Subjects -> ENVIRONMENTAL STUDIES (Total: 913 journals)
    - ENVIRONMENTAL STUDIES (810 journals)
    - POLLUTION (31 journals)
    - TOXICOLOGY AND ENVIRONMENTAL SAFETY (54 journals)
    - WASTE MANAGEMENT (18 journals)

ENVIRONMENTAL STUDIES (810 journals)                  1 2 3 4 5 | Last

Showing 1 - 200 of 378 Journals sorted alphabetically
ACS Chemical Health & Safety     Hybrid Journal   (Followers: 4)
ACS Environmental Au     Open Access   (Followers: 10)
ACS ES&T Engineering     Hybrid Journal   (Followers: 1)
Acta Brasiliensis     Open Access  
Acta Ecologica Sinica     Open Access   (Followers: 9)
Acta Oecologica     Hybrid Journal   (Followers: 12)
Advanced Electronic Materials     Hybrid Journal   (Followers: 12)
Advanced Energy and Sustainability Research     Open Access   (Followers: 5)
Advanced Membranes     Open Access   (Followers: 8)
Advanced Sustainable Systems     Hybrid Journal   (Followers: 7)
Advances in Ecological Research     Full-text available via subscription   (Followers: 43)
Advances in Environmental Chemistry     Open Access   (Followers: 13)
Advances in Environmental Sciences - International Journal of the Bioflux Society     Open Access   (Followers: 16)
Advances in Environmental Technology     Open Access   (Followers: 2)
Advances in Life Science and Technology     Open Access   (Followers: 11)
Advances in Tropical Biodiversity and Environmental Sciences     Open Access   (Followers: 4)
Aeolian Research     Hybrid Journal   (Followers: 7)
Agricultura Tecnica     Open Access   (Followers: 2)
Agricultural & Environmental Letters     Open Access   (Followers: 4)
Agro-Science     Full-text available via subscription   (Followers: 2)
Agroecological journal     Open Access   (Followers: 1)
Agronomy for Sustainable Development     Open Access   (Followers: 19)
Agrosystems, Geosciences & Environment     Open Access   (Followers: 6)
Amazon's Research and Environmental Law     Open Access   (Followers: 3)
Ambiens. Revista Iberoamericana Universitaria en Ambiente, Sociedad y Sustentabilidad     Open Access  
Ambiente & sociedade     Open Access   (Followers: 2)
American Journal of Energy and Environment     Open Access   (Followers: 4)
American Journal of Environmental Engineering     Open Access   (Followers: 6)
American Journal of Environmental Protection     Open Access   (Followers: 5)
American Journal of Environmental Sciences     Open Access   (Followers: 9)
American Naturalist     Full-text available via subscription   (Followers: 79)
Animal - Open Space     Open Access   (Followers: 5)
Annals of Civil and Environmental Engineering     Open Access   (Followers: 1)
Annals of Environmental Science and Toxicology     Open Access   (Followers: 3)
Annals of GIS     Open Access   (Followers: 31)
Annual Review of Ecology, Evolution, and Systematics     Full-text available via subscription   (Followers: 82)
Annual Review of Environment and Resources     Full-text available via subscription   (Followers: 16)
Annual Review of Pharmacology and Toxicology     Full-text available via subscription   (Followers: 38)
Annual Review of Resource Economics     Full-text available via subscription   (Followers: 11)
Applied and Environmental Soil Science     Open Access   (Followers: 15)
Applied Ecology and Environmental Sciences     Open Access   (Followers: 29)
Applied Environmental Education & Communication     Hybrid Journal   (Followers: 17)
Applied Journal of Environmental Engineering Science     Open Access   (Followers: 1)
Aquatic Ecology     Hybrid Journal   (Followers: 42)
Aquatic Toxicology     Hybrid Journal   (Followers: 26)
Arcada : Revista de conservación del patrimonio cultural     Open Access  
Architecture, Civil Engineering, Environment     Open Access   (Followers: 4)
Archives des Maladies Professionnelles et de l'Environnement     Full-text available via subscription  
Archives of Environmental and Occupational Health     Hybrid Journal   (Followers: 10)
Archives of Environmental Contamination and Toxicology     Hybrid Journal   (Followers: 12)
Archives of Environmental Protection     Open Access   (Followers: 5)
Archives of Toxicology     Hybrid Journal   (Followers: 20)
Arctic Environmental Research     Open Access  
Asian Journal of Environment & Ecology     Open Access   (Followers: 2)
Asian Journal of Rural Development     Open Access   (Followers: 10)
Asian Review of Environmental and Earth Sciences     Open Access   (Followers: 2)
ATBU Journal of Environmental Technology     Open Access   (Followers: 1)
Atmospheric and Climate Sciences     Open Access   (Followers: 38)
Atmospheric Environment     Hybrid Journal   (Followers: 72)
Atmospheric Environment : X     Open Access   (Followers: 3)
Augm Domus : Revista electrónica del Comité de Medio Ambiente de AUGM     Open Access  
Austral Ecology     Hybrid Journal   (Followers: 17)
Australasian Journal of Environmental Management     Hybrid Journal   (Followers: 9)
Australasian Journal of Human Security     Full-text available via subscription   (Followers: 2)
Australian Journal of Environmental Education     Full-text available via subscription   (Followers: 10)
Basic & Clinical Pharmacology & Toxicology     Hybrid Journal   (Followers: 14)
Basic and Applied Ecology     Hybrid Journal   (Followers: 22)
Behavioral Ecology     Hybrid Journal   (Followers: 57)
Behavioral Ecology and Sociobiology     Hybrid Journal   (Followers: 35)
Biocenosis     Open Access  
Biochar     Hybrid Journal   (Followers: 1)
Biodegradation     Hybrid Journal   (Followers: 2)
Biodiversity     Hybrid Journal   (Followers: 28)
Biofouling: The Journal of Bioadhesion and Biofilm Research     Hybrid Journal   (Followers: 2)
Bioremediation Journal     Hybrid Journal   (Followers: 4)
BioRisk     Open Access   (Followers: 2)
Boletín Semillas Ambientales     Open Access  
Bothalia : African Biodiversity & Conservation     Open Access  
Built Environment     Full-text available via subscription   (Followers: 6)
Bulletin of Environmental Contamination and Toxicology     Hybrid Journal   (Followers: 10)
Bulletin of the American Meteorological Society     Open Access   (Followers: 63)
Bumi Lestari Journal of Environment     Open Access  
Canadian Journal of Earth Sciences     Hybrid Journal   (Followers: 22)
Canadian Journal of Remote Sensing     Full-text available via subscription   (Followers: 55)
Canadian Journal of Soil Science     Full-text available via subscription   (Followers: 12)
Canadian Water Resources Journal     Hybrid Journal   (Followers: 18)
Capitalism Nature Socialism     Hybrid Journal   (Followers: 21)
Carbon Capture Science & Technology     Open Access  
Carbon Resources Conversion     Open Access   (Followers: 2)
Case Studies in Chemical and Environmental Engineering     Open Access  
Cell Biology and Toxicology     Hybrid Journal   (Followers: 10)
Chain Reaction     Full-text available via subscription  
Challenges in Sustainability     Open Access   (Followers: 10)
Chemical Research in Toxicology     Hybrid Journal   (Followers: 22)
Chemico-Biological Interactions     Hybrid Journal   (Followers: 3)
Chemosphere     Hybrid Journal   (Followers: 19)
Child and Adolescent Mental Health     Hybrid Journal   (Followers: 69)
Chinese Journal of Environmental Law     Hybrid Journal   (Followers: 1)
Ciencia, Ambiente y Clima     Open Access   (Followers: 1)
City and Environment Interactions     Open Access   (Followers: 3)
Civil and Environmental Engineering     Open Access   (Followers: 7)
Civil and Environmental Engineering Reports     Open Access   (Followers: 4)
Civil and Environmental Research     Open Access   (Followers: 14)
CLEAN - Soil, Air, Water     Hybrid Journal   (Followers: 18)
Clean Technologies     Open Access   (Followers: 1)
Clean Technologies and Environmental Policy     Hybrid Journal   (Followers: 5)
Cleaner and Circular Bioeconomy (CLCB)     Open Access   (Followers: 9)
Cleaner Energy Systems     Open Access   (Followers: 6)
Cleaner Environmental Systems     Open Access  
Cleaner Production Letters     Hybrid Journal  
Cleaner Waste Systems     Open Access   (Followers: 5)
Cleanroom Technology     Full-text available via subscription   (Followers: 1)
Climate and Energy     Full-text available via subscription   (Followers: 10)
Climate Change Ecology     Open Access   (Followers: 29)
Climate Change Economics     Hybrid Journal   (Followers: 51)
Climate Policy     Hybrid Journal   (Followers: 60)
Climate Resilience and Sustainability     Open Access   (Followers: 34)
Coastal Engineering Journal     Hybrid Journal   (Followers: 9)
Cogent Environmental Science     Open Access  
Columbia Journal of Environmental Law     Open Access   (Followers: 13)
Computational Ecology and Software     Open Access   (Followers: 9)
Computational Water, Energy, and Environmental Engineering     Open Access   (Followers: 5)
Conservation and Society     Open Access   (Followers: 14)
Conservation Letters     Open Access   (Followers: 50)
Conservation Science     Open Access   (Followers: 29)
Consilience : The Journal of Sustainable Development     Open Access   (Followers: 2)
Contemporary Problems of Ecology     Hybrid Journal   (Followers: 4)
Critical Reviews in Environmental Science and Technology     Hybrid Journal   (Followers: 11)
Critical Reviews in Toxicology     Hybrid Journal   (Followers: 25)
Cuadernos de Investigación Geográfica / Geographical Research Letters     Open Access  
Culture, Agriculture, Food and Environment     Hybrid Journal   (Followers: 24)
Culture, Agriculture, Food and Environment     Hybrid Journal   (Followers: 8)
Current Environmental Health Reports     Hybrid Journal   (Followers: 2)
Current Forestry Reports     Hybrid Journal   (Followers: 1)
Current Landscape Ecology Reports     Hybrid Journal   (Followers: 2)
Current Opinion in Environmental Science & Health     Hybrid Journal  
Current Opinion in Environmental Sustainability     Hybrid Journal   (Followers: 14)
Current Research in Ecological and Social Psychology     Open Access   (Followers: 3)
Current Research in Environmental Sustainability     Open Access   (Followers: 4)
Current Research in Green and Sustainable Chemistry     Open Access   (Followers: 1)
Current Research in Microbiology     Open Access   (Followers: 20)
Current Sustainable/Renewable Energy Reports     Hybrid Journal   (Followers: 7)
Die Bodenkultur : Journal of Land Management, Food and Environment     Open Access  
Disaster Prevention and Management     Hybrid Journal   (Followers: 27)
Discover Sustainability     Open Access   (Followers: 3)
disP - The Planning Review     Hybrid Journal   (Followers: 1)
Drug and Chemical Toxicology     Hybrid Journal   (Followers: 13)
Duke Environmental Law & Policy Forum     Open Access   (Followers: 8)
E3S Web of Conferences     Open Access  
Earth and Environmental Science Transactions of the Royal Society of Edinburgh     Hybrid Journal   (Followers: 7)
Earth Interactions     Open Access   (Followers: 10)
Earth Science Informatics     Hybrid Journal   (Followers: 7)
Earth System Governance     Open Access   (Followers: 1)
Earth System Science Data (ESSD)     Open Access   (Followers: 9)
Earth Systems and Environment     Hybrid Journal   (Followers: 3)
EchoGéo     Open Access  
Eco-Environment & Health     Open Access   (Followers: 5)
Eco-Thinking     Open Access   (Followers: 2)
Ecocycles     Open Access   (Followers: 4)
Ecohydrology     Hybrid Journal   (Followers: 11)
Ecohydrology & Hydrobiology     Full-text available via subscription   (Followers: 5)
Ecologia Aplicada     Open Access  
Ecología en Bolivia     Open Access  
Ecological Applications     Full-text available via subscription   (Followers: 162)
Ecological Chemistry and Engineering S     Open Access   (Followers: 3)
Ecological Complexity     Hybrid Journal   (Followers: 8)
Ecological Engineering     Hybrid Journal   (Followers: 5)
Ecological Indicators     Hybrid Journal   (Followers: 22)
Ecological Informatics     Hybrid Journal   (Followers: 4)
Ecological Management & Restoration     Hybrid Journal   (Followers: 15)
Ecological Modelling     Hybrid Journal   (Followers: 73)
Ecological Monographs     Full-text available via subscription   (Followers: 37)
Ecological Processes     Open Access   (Followers: 2)
Ecological Questions     Open Access   (Followers: 5)
Ecological Research     Hybrid Journal   (Followers: 10)
Ecological Restoration     Full-text available via subscription   (Followers: 22)
Ecologist, The     Full-text available via subscription   (Followers: 22)
Ecology     Full-text available via subscription   (Followers: 390)
Ecology and Evolution     Open Access   (Followers: 100)
Ecology Letters     Hybrid Journal   (Followers: 274)
EcoMat : Functional Materials for Green Energy and Environment     Open Access  
Economics and Policy of Energy and the Environment     Full-text available via subscription   (Followers: 14)
Economics of Energy & Environmental Policy     Hybrid Journal   (Followers: 1)
Économie rurale     Open Access   (Followers: 3)
Ecoprint : An International Journal of Ecology     Open Access   (Followers: 4)
Ecopsychology     Hybrid Journal   (Followers: 7)
Ecosphere     Open Access   (Followers: 12)
Ecosystem Services     Hybrid Journal   (Followers: 8)
Ecosystems     Hybrid Journal   (Followers: 33)
Ecosystems and People     Open Access   (Followers: 4)
Ecotoxicology     Hybrid Journal   (Followers: 9)
Ecotoxicology and Environmental Safety     Hybrid Journal   (Followers: 10)
Ecotrophic : Journal of Environmental Science     Open Access  
Ecozon@ : European Journal of Literature, Culture and Environment     Open Access   (Followers: 3)
Éducation relative à l'environnement     Open Access  
Electronic Green Journal     Open Access   (Followers: 4)
Empowering Sustainability International Journal     Open Access   (Followers: 4)
Energy & Environment     Hybrid Journal   (Followers: 26)
Energy & Environmental Science     Hybrid Journal   (Followers: 33)
Energy and Climate Change     Hybrid Journal   (Followers: 11)

        1 2 3 4 5 | Last

Similar Journals
Journal Cover
Canadian Journal of Soil Science
Journal Prestige (SJR): 0.52
Citation Impact (citeScore): 1
Number of Followers: 12  
 
  Full-text available via subscription Subscription journal
ISSN (Print) 0008-4271 - ISSN (Online) 1918-1841
Published by NRC Research Press Homepage  [19 journals]
  • Fertilizing effect of wastewater-derived granular struvite on contrasting
           Manitoba soils

    • Free pre-print version: Loading...

      Authors: Joanne R. Thiessen Martens, Oban D. Srinathan, Inoka Amarakoon
      Abstract: Canadian Journal of Soil Science, Ahead of Print.
      Wastewater-derived struvite is a promising phosphorus (P) fertilizer but more information on its behaviour in soil is needed to guide management practices for this slow-release fertilizer. After 20 days of incubation in two contrasting low-P soils in Petri dishes at two temperatures, the Olsen-P concentrations in soil surrounding struvite granules were 30–122 mg kg−1, which were much lower than after amendment with monoammonium phosphate (MAP) (435–1063 mg kg−1). Olsen-P concentrations further from the granule showed that MAP fertilized a larger volume of soil than struvite. Thus, the fertilizing effect of struvite may be very localized in soil.
      Citation: Canadian Journal of Soil Science
      PubDate: 2023-01-09T08:00:00Z
      DOI: 10.1139/cjss-2022-0013
       
  • Soil quality index under different land-use types: the case of Choke
           Mountain agroecosystems, upper Blue Nile Basin, Ethiopia

    • Free pre-print version: Loading...

      Authors: Demeku Mesfin, Engdawork Assefa, Belay Simane
      Abstract: Canadian Journal of Soil Science, Ahead of Print.
      In an agroecosystem (AES), land-use types affect soil quality. As a result, determining soil quality in various land uses is critical. This study was carried out to evaluate the soil quality index (SQI) of the different land-use types in AESs of the Choke Mountain watershed, upper Blue Nile Basin. Forty-seven soil samples were taken from cultivated land (CL), grazing land (GL), plantation forest land (PFL), and natural forest land (NFL) of the five AESs. The minimum data set (MDS) was chosen using principal component analysis. To calculate SQI, five soil quality indicators were selected as an MDS: silt, pH, cation exchange capacity, exchangeable potassium, and soil organic matter. SQIs for the overall land uses were ordered as GL > NFL > PFL > CL. Compared with NFL, the SQIs of PFL and CL were reduced by 10% and 19.7%, respectively, whereas the SQI of GL was increased by 1.8%. Among AESs of Choke, SQI of GL was higher in the midland plain, dominated by Vertisol (AES 2), followed by the midland plain with Nitosols (AES 3). SQI of CL was intermediate, and SQIs of GL, NFL, and PFL were good. AES 2 of the watershed recorded the highest total SQI value, whereas hilly and mountainous highlands (AES 5) recorded the lowest SQIs compared to other AESs. Thus, site-specific land use and management practices across the various AESs should be recommended to policymakers and farmers for a sustainable ecosystem and environment.
      Citation: Canadian Journal of Soil Science
      PubDate: 2023-01-09T08:00:00Z
      DOI: 10.1139/cjss-2022-0053
       
  • Mapping the maximum peat thickness of cultivated organic soils in the
           southwest plain of Montreal

    • Free pre-print version: Loading...

      Authors: Raphaël Deragon, Daniel D. Saurette, Brandon Heung, Jean Caron
      Abstract: Canadian Journal of Soil Science, Ahead of Print.
      Large organic deposits in the southwestern plain of Montreal have been converted to agricultural land for vegetable production. In addition to the variable depth of the organic deposits, these soils commonly have an impermeable coprogenous layer between the peat and the underlying mineral substratum. Estimations of the depth and thickness of these materials are critical for soil management. Therefore, five drained and cultivated peatlands were studied to estimate their maximum peat thickness (MPT)—a potential key soil property that can help identify management zones for their conservation. MPT can be defined as the depth to the mineral layer (DML) minus the coprogenous layer thickness (CLT). The objective of this study was to estimate DML, CLT, and MPT at a regional scale using environmental covariates derived from remote sensing. Three machine-learning models (Cubist, Random Forest, and k-Nearest Neighbor) were compared to produce maps of DML and CLT, which were combined to generate MPT at a spatial resolution of 10 m. The Cubist model performed the best for predicting both features of interest, yielding Lin’s concordance correlation coefficients of 0.43 and 0.07 for DML and CLT, respectively, using a spatial cross-validation procedure. Interpretation of the drivers of CLT was limited by the poor predictive power of the final model. More precise data on MPT are needed to support soil conservation practices, and more CLT field observations are required to obtain a higher prediction accuracy. Nonetheless, digital soil mapping using open-access geospatial data shows promise for understanding and managing cultivated peatlands.
      Citation: Canadian Journal of Soil Science
      PubDate: 2023-01-05T08:00:00Z
      DOI: 10.1139/cjss-2022-0031
       
  • Predictive mapping of wetland soil types in the Canadian Prairie Pothole
           Region using high-resolution digital elevation model terrain derivatives

    • Free pre-print version: Loading...

      Authors: Jeremy Kiss, Angela Bedard-Haughn, Preston Sorenson
      Abstract: Canadian Journal of Soil Science, Ahead of Print.
      Wetland soil types, which can be distinguished based on calcium carbonate content, vary in their effect on ecosystem functions like phosphorus retention, salinity contributions, and greenhouse gas forcing. These soil types may be predictively mapped with machine learning models that use terrain derivatives calculated from high-resolution digital elevation models. Soil profiles from three Saskatchewan study sites were classified into three functional categories—upland, calcareous wetland, or noncalcareous wetland—and used to train random forest models for predictive soil mapping. Multiple terrain derivatives were included as predictor variables to capture local- and landscape-scale morphometry and hydrology influences, including five derivatives developed for this study. Models were developed at three spatial resolutions: 2, 5, and 10 m, and tested via internal cross-validation and independent validation with datasets from previous studies. Predictive accuracies were highest when mapping at 2 m resolution (independent validation accuracy range = 64%–100%) but also successful when mapping at 5 and 10 m resolutions (independent validation accuracy range = 63%–100%); however, visual inspection determined that the maps generated at 10 m resolution were less detailed and occasionally featured questionable discontinuous soil distributions. Three of the five terrain derivatives developed for this study were among the most important predictor variables (first, second, and 10th most important). Models trained using only data from a specific site had slightly better performance than models trained using data from all sites, except in regions where training data were lacking.
      Citation: Canadian Journal of Soil Science
      PubDate: 2022-11-23T08:00:00Z
      DOI: 10.1139/cjss-2022-0034
       
  • Crop rotational diversity alters the composition of stabilized soil
           organic matter compounds in soil physical fractions

    • Free pre-print version: Loading...

      Authors: Huan Tong, Meiling Man, Claudia Wagner-Riddle, Kari E. Dunfield, Bill Deen, Myrna J. Simpson
      Abstract: Canadian Journal of Soil Science, Ahead of Print.
      Crop rotational diversity is an important part of sustainable agricultural and soil management to improve crop yield and soil fertility including enhancing soil organic matter (SOM) stabilization. Because of the physical protection via interactions with soil minerals, SOM in mineral-associated fractions is believed to be longer-lived and more stable relative to SOM in particulate (light) fractions. However, it is still unclear how crop rotational diversity alters soil carbon distribution, composition and stabilization in soil physical fractions. To address this, we studied a 37 years’ agricultural site with different crop rotational diversity (from continuous corn or alfalfa up to four species (corn, soybean, winter wheat, and red clover)). Soil carbon analysis, targeted compound analysis and nuclear magnetic resonance spectroscopy methods were used to obtain the distribution and degradation of SOM components in light and mineral-associated (F53–2000 µm, F2–53 µm, and F
      Citation: Canadian Journal of Soil Science
      PubDate: 2022-11-23T08:00:00Z
      DOI: 10.1139/cjss-2022-0058
       
  • Identifying rotation and tillage practices that maintain or enhance soil
           carbon and its relation to soil health

    • Free pre-print version: Loading...

      Authors: Erin Wepruk, Amanda Diochon, Laura L. Van Eerd, Edward Gregorich, Bill Deen, David Hooker
      Abstract: Canadian Journal of Soil Science, Ahead of Print.
      Physical fractions of soil organic matter (SOM) are established indicators of management-induced change and have been used to estimate the soil carbon storage capacity and storage potential. Here, we use SOM physical fractions and soil textures to identify management practices that maintain or enhance soil health and carbon storage in agricultural soils in Ontario. Metadata from the National Soil Database were used to estimate carbon storage potentials and calculate carbon deficits. A map was created showing carbon deficits in Ontario's agricultural soils and indicates that these soils have the potential to store an additional 0 to 2 kg m−2 in the top 20 cm of the soil. Tillage system generally had no effect on the size of the carbon deficit at four long-term agricultural experiments (Delhi, Elora, Ottawa, and Ridgetown). There was only a significant tillage effect at Ridgetown and only in the maize–soybean crop rotation, where the carbon deficit was 2.95 g C kg soil−1 under conventional tillage compared to 8.97 g C kg soil−1 with no tillage. A statistically significant effect of crop rotation was detected in Elora and Ridgetown. In Elora, continuous alfalfa had the smallest carbon deficit (7.25 g C kg soil−1) and maize–soybean rotation had the largest deficit (12.07 g C kg soil−1). In Ridgetown, the maize–soybean rotation had the smallest carbon deficit (2.95 g C kg soil−1). Regression analysis showed a weak negative relationship (R2 = 0.11; P 
      Citation: Canadian Journal of Soil Science
      PubDate: 2022-09-15T07:00:00Z
      DOI: 10.1139/cjss-2021-0161
       
  • Biochar–compost mixture and cover crop effects on soil carbon and
           nitrogen dynamics, yield, and fruit quality in an irrigated vineyard

    • Free pre-print version: Loading...

      Authors: Mehdi Sharifi, Monireh Hajiaghaei-Kamrani
      Abstract: Canadian Journal of Soil Science, Ahead of Print.
      Effects of biochar–compost (B+Com) mixture and cover crop were assessed on soil and grapevine productivity in an irrigated Merlot (Vitis vinifera L.) vineyard in Okanagan Valley, British Columbia (BC), Canada, from 2017 to 2020. The experimental design was a factorial arrangement of control, B+Com, cover crop, and combination of cover crop and B+Com (cover crop/B+Com) treatments in alleys with four replications. The B+Com comprised a 1:1 ratio of biochar and compost and was applied at a rate of 22 Mg ha−1 dry weight basis in May 2017 and 2019. The cover crop consisted of a dryland forage mixture and bird’s-foot trefoil (Lotus corniculatus L.). B+Com treatment did not affect cover crop biomass or tissue C and N concentrations except for a 12% reduction in 2019 biomass. B+Com and cover crop/B+Com increased soil C content averaged across sampling dates by 11% and 17% (P 
      Citation: Canadian Journal of Soil Science
      PubDate: 2022-08-05T07:00:00Z
      DOI: 10.1139/cjss-2021-0147
       
  • The story of long-term research sites and soil health in Canadian
           agriculture

    • Free pre-print version: Loading...

      Authors: Charlotte E. Norris, Monika Gorzelak, Melissa Arcand, Darren Bruhjell, Cameron N. Carlyle, Miles Dyck, Benjamin Ellert, Martin Entz, Charles M. Geddes, Xiying Hao, Ken Janovicek, Francis Larney, William May, Mervin St. Luce, Laura L. Van Eerd, Tiequan Zhang, Ryan Beck, Tony Cowen, Daniel Liptzin, Cristine L.S. Morgan
      Abstract: Canadian Journal of Soil Science, Ahead of Print.
      Canada's interest in agricultural lands has changed with time from a desire of crop yields at Confederation through to discussions in the Senate on adaptation and resilience in 2018. Long-term research experiments (LTRs) have been present and utilized by federal and university researchers to provide answers throughout. Here we highlight the importance of LTRs by identifying the historical context of LTRs and soil health research in Canada. We then briefly describe the history and key results from select LTRs and illustrate the wealth of information collected from the North American Project to Evaluate Soil Health Measurements cross-country point-in-time soil sampling from these LTRs. We discuss the LTRs, and the knowledge gained from them, with the hope that by showing the distinctive narratives associated with each of these study sites, researchers will be inspired to use them to address their research questions and make sound predictions to facilitate the adaptation of Canadian agroecosystems to climate challenges. Through identifying the value generated by these unique LTRs, we hope that the importance of these sites will inspire not only their continued maintenance but also the next generation of LTRs.
      Citation: Canadian Journal of Soil Science
      PubDate: 2022-07-27T07:00:00Z
      DOI: 10.1139/cjss-2021-0174
       
  • Modeling of total and active organic carbon dynamics in agricultural soil
           using digital soil mapping: a case study from Central Nova Scotia

    • Free pre-print version: Loading...

      Authors: Siddhartho S. Paul, Brandon Heung, Derek H. Lynch
      Abstract: Canadian Journal of Soil Science, Ahead of Print.
      Monitoring the changes in soil organic carbon (SOC) pools is critical for sustainable soil and agricultural management. This case study models total and active organic carbon dynamics (2015/2016 to 2019/2020) using digital soil mapping (DSM) techniques. Model predictors include topographic variables generated from light detection and ranging data; soil and vegetation indices derived from Landsat satellite images; and soil and crop inventory information from Agriculture and Agri-Food Canada to predict total organic carbon (TOC) and permanganate oxidizable carbon (POXc) at the 0–15 cm depth increment for a 37 km2 study area in Truro, Nova Scotia. Quantile Regression Forest and stochastic Gradient Boosting Model were utilized for prediction. Although both models performed equally well for predicting TOC and POXc, the accuracy of TOC predictions (e.g., concordance correlation coefficient (CCC) = 0.67) was better than POXc predictions (e.g., CCC = 0.53). The Landsat variables and crop inventory were dominant predictors, while topographic variables across the relatively homogeneous terrain had relatively little influence. During the study period, changes in POXc were predicted across 98% of the study area, with a mean absolute loss of 5.77 (±11.48) mg/kg/year, and in TOC on 27% of the area, with a mean absolute loss of 0.15 (±0.09) g/kg/year. While the annual crop fields observed the highest loss of TOC and POXc, the decline in pasture–grassland–forage fields was relatively low. The study reinforced the effectiveness of DSM for modeling multiple SOC pools at the farm to landscape scales.
      Citation: Canadian Journal of Soil Science
      PubDate: 2022-07-27T07:00:00Z
      DOI: 10.1139/cjss-2022-0012
       
  • Improved parent material map disaggregation methods in the Saskatchewan
           prairies using historical bare soil composite imagery

    • Free pre-print version: Loading...

      Authors: P.T. Sorenson, J. Kiss, A.K. Bedard-Haughn
      Abstract: Canadian Journal of Soil Science, Ahead of Print.
      The major drivers of soil variation in Saskatchewan at scales finer than the existing soil maps are parent material variance, slope position, and salinity. There is therefore a need to generate finer-scale parent material maps as part of updating soil maps in Saskatchewan. As spatially referenced soil point data are lacking in Saskatchewan, predictive soil mapping methods that disaggregate existing soil parent material maps are required. This study focused on investigating important environmental covariates to use in parent material disaggregation, particularly bare soil composite imagery (BSCI). Synthetic point observations were generated using an area-proportional approach based on existing soil survey polygons and a random forest model was trained with those synthetic observations to predict parent material classes. Including BSCI as environmental covariates increased model accuracy from 0.38 to 0.52 and the model Kappa score from 0.19 to 0.35 compared with models where it was not included. Models that included training points from all locations, regardless of whether BSCI was available, and included BSCI as environmental covariates had similar results to the BSCI model with an accuracy of 0.48 and a Kappa value of 0.30. Based on these results, BSCI is an important covariate for parent material disaggregation in the Saskatchewan Prairies. Future work to disaggregate soil classes based on slope position and salinity, and to combine those methods with parent material disaggregation is needed to generate detailed soil maps for the Canadian Prairies.
      Citation: Canadian Journal of Soil Science
      PubDate: 2022-07-15T07:00:00Z
      DOI: 10.1139/cjss-2021-0154
       
  • Ex situ soil respiration assessment using minimally disturbed microcosms
           and dried–sieved soils; comparison of methods to assess soil health

    • Free pre-print version: Loading...

      Authors: Louis-Pierre Comeau, Kyle MacKinley, Adrian Unc, Jeremiah Vallotton
      Abstract: Canadian Journal of Soil Science, Ahead of Print.
      Soil respiration measurements are commonly used as soil health indicators. Several ex situ soil respiration methods exist, but comparative performances between them have rarely been analyzed. Specifically, there is a lack of comparisons between intact microcosms and destructive methods. The objective of this study was to analyze and compare three different ex situ soil respiration methodologies: minimally disturbed microcosms using fresh soil, dried–sieved 24 h burst test, and dried–sieved 10-day incubation. We hypothesized that (i) the respiration rates for the three methods are correlated to each other; (ii) the respiration rates are strongly correlated with soil physico-chemical parameters; (iii) disturbance caused by drying and sieving reduces regression coefficients compared with microcosms; and (iv) drying and sieving soil produces larger respiration rates. Soil was collected in the Province of New Brunswick, Canada. Total carbon and nitrogen (C:N), pH, aggregate stability, total dissolved C and N, NO3 and NH4, texture, and labile C were determined prior to incubations. Our results showed that the three methods had CO2 efflux in similar ranges. However, all the methods had low to no significant correlations between soil physico-chemical parameters and respiration. Total dissolved N had the strongest correlation with CO2 efflux. The results of the microcosm method significantly correlated with the results for 24 h burst test but not with the 10-day incubation method. We conclude that drying and sieving soil prior to performing ex situ soil heterotrophic respiration measurements using the 24 h burst tests can produce cautiously reliable results. Despite the disturbance, results from the 24 h burst tests are comparable with the results of the microcosm method.
      Citation: Canadian Journal of Soil Science
      PubDate: 2022-07-05T07:00:00Z
      DOI: 10.1139/cjss-2021-0143
       
  • Twenty-four years of contrasting cropping systems on a brown chernozem in
           Southern Alberta: crop yields, soil carbon, and subsoil salinity

    • Free pre-print version: Loading...

      Authors: E. Bremer, D. Pauly, R.H. McKenzie, B.H. Ellert, H.H. Janzen
      Abstract: Canadian Journal of Soil Science, Ahead of Print.
      Cropping systems with perennial forages and reduced fallow frequency generally increase soil organic carbon and thus subsequent soil health and crop yield. We evaluated the impact of prior cropping systems on subsequent yields and soil properties in a semiarid region by using crop yields as a bioassay of soil health following the termination of a 24-year crop rotation study in the Brown soil zone in Alberta. During 24 growing seasons from 1992 to 2015, the study included three fallow-containing rotations, two annual crop rotations that were cropped continuously, and perennial grass hay, each with two to six fertilizer treatments. During the bioassay period from 2016 through 2020, all plots in the study were uniformly cropped. Compared to unfertilized fallow wheat, soil organic C in the fall of 2015 was 54% higher after 24 years of fertilized grass and up to 14% higher following annual crops in rotations without fallow. The most notable impact of the previous cropping system on yield during the bioassay years was low yield following perennial grass in 2016 and 2018. Soil electrical conductivity measurements showed that subsoil salinity was elevated following perennial grass, demonstrating the importance of subsoil characteristics for healthy soils. Crop yields in the fifth year of the crop bioassay were 10%–20% greater due to reduced fallow frequency or increased crop diversity. The long-term impact of the cropping system on crop yield in this study depended on drought intensity due to counteracting changes in soil organic matter and subsoil salinity.
      Citation: Canadian Journal of Soil Science
      PubDate: 2022-06-29T07:00:00Z
      DOI: 10.1139/cjss-2021-0181
       
  • Better recognition of limnic materials at the great group and subgroup
           

    • Free pre-print version: Loading...

      Authors: Daniel D. Saurette, Raphaël Deragon
      Abstract: Canadian Journal of Soil Science, Ahead of Print.
      In the Canadian System of Soil Classification (CSSC), soils of the Organic order are classified at the great group level primarily based on the dominant organic material in the middle tier. The system recognizes four types of organic horizons: fibric (Of), mesic (Om), humic (Oh), and coprogenous earth (Oco), of which only the latter is not recognized at the great group level of the Organic order. Furthermore, at the subgroup level, Limnic subgroups cannot have terric or hydric layers. This is problematic in soils where the middle tier is dominated by limnic materials, and those which have dominantly limnic materials and have a terric layer. We describe 29 soil profiles in Ontario and Quebec, which are either poorly captured in the CSSC or that cannot be classified into the Organic order based on their diagnostic criteria. Based on an analysis of soil survey information in five provinces across Canada, we estimate 32 057 ha of organic soils which potentially contain limnic deposits. In key vegetable-producing areas of Quebec, large organic deposits in agricultural production are subject to peat subsidence and erosion, resulting in shallower depths to underlying coprogenous earth, which is not a suitable medium for crop production. This can potentially have negative effects on crops when mixed with humic materials in the plow layer. Due to these taxonomic and agronomic considerations, we propose the addition of a new great group, Limnisol, and suggest further integration of limnic materials at the subgroup level for the Humisol, Mesisol, and Fibrisol great groups.
      Citation: Canadian Journal of Soil Science
      PubDate: 2022-06-06T07:00:00Z
      DOI: 10.1139/cjss-2022-0030
       
  • Adoption of beneficial management practices to improve soil health

    • Free pre-print version: Loading...

      Authors: Ananka Shah, Alfons Weersink, Richard Vyn
      First page: 825
      Abstract: Canadian Journal of Soil Science, Ahead of Print.
      Healthy soils are fundamental to building prosperous and resilient farms and to efforts to reduce greenhouse gas emissions and enhance overall environmental impacts from agriculture. Understanding the adoption of beneficial management practices (BMPs) that promote soil health is necessary for these benefits to be obtained. Drawing from a survey of Ontario farmers (n = 247) with 60% being crop producers and 22% livestock farmers, we explore the variation in adoption for six soil health BMPs: cover crops, crop rotations, no-till, soil testing, conservation buffers, and organic amendments. Soil testing had the highest rate of adoption, while conservation buffers had the least. The majority of farmers (73%) implemented four or more BMPs as the use of practices such as a rotation with winter wheat, cover cropping, and no-till tend to be positively correlated. Adopters of the BMPs tend to operate larger farms both in the area operated and farm cash receipts than non-adopters. Improving soil health was the most widely selected motivation for adoption across all six BMPs. The most effective interventions to enhance adoption among non-adopters include financial incentives, easily accessible information and advice, and farmer-to-farmer learning. Our results suggest that farmers that adopt BMPs do so primarily to enhance soil health rather than solely for economic considerations. Encouraging use among non-adopters may require monitoring and promoting the benefits of soil health. The results should aid in the development of strategic frameworks that facilitate innovations in policy to enhance soil health.
      Citation: Canadian Journal of Soil Science
      PubDate: 2022-04-22T07:00:00Z
      DOI: 10.1139/cjss-2021-0187
       
  • Comparing direct and indirect approaches to predicting soil texture class

    • Free pre-print version: Loading...

      Authors: Daniel D. Saurette
      First page: 835
      Abstract: Canadian Journal of Soil Science, Ahead of Print.
      Soil texture, or the relative proportions of sand, silt, and clay, is a key soil attribute that influences many important physical, chemical, and biological properties of soils. Digital soil mapping is increasingly used to predict soil texture; however, few comparisons have been made between direct prediction of a texture class, and the indirect prediction of texture class by first predicting sand, silt, and clay content, and subsequently converting the predictions to a texture class. We predicted soil texture class for the 5–15 and 30–60 cm depth intervals of the Ottawa soil survey project using direct and indirect approaches which yielded a similar overall accuracy (28–36%) and kappa (0.19–0.27). The predicted soil maps had a similar spatial distribution of soil texture classes. We then used the Euclidean distance between the texture classes to adjust the model performance metrics, revealing the indirect approach provided the better soil texture class prediction. When comparing the predictions, the 5–15 and 30–60 cm maps were in perfect agreement for 53% and 42% of the study area, respectively, and in both cases texture class predictions were within one texture class for over 87% of the map area. For many studies, including legacy soil surveys, texture class information is available, and particle size distribution data are generally lacking. This study confirms that direct prediction of soil texture class performs almost equally with indirect prediction.
      Citation: Canadian Journal of Soil Science
      PubDate: 2022-04-27T07:00:00Z
      DOI: 10.1139/cjss-2022-0040
       
  • Predictive soil mapping in the Boreal Plains of Northern Alberta by using
           multi-temporal remote sensing data and terrain derivatives

    • Free pre-print version: Loading...

      Authors: Preston T. Sorenson, Jeremy Kiss, Anna Serdetchnaia, Javed Iqbal, Angela K. Bedard-Haughn
      First page: 852
      Abstract: Canadian Journal of Soil Science, Ahead of Print.
      As Canada's vast Boreal Plains are extensively managed, predictive soil mapping could be used as an effective tool to generate high-resolution soil information for the region to inform sustainable resource management. This study aimed to investigate the use of multi-temporal remote sensing data and terrain derivatives to map soil types in the region. A method of constraining subgroup and great-group soil-type predictions based on the predictions at higher-order levels (great-group and order, respectively) was tested. Sentinel time series median values obtained by using Google Earth Engine were tested in combination with first- and second-order digital elevation model derivatives for use as predictor variables in the predictive models. A recursive feature selection process was implemented to reduce the number of predictor variables used in model training. Soil classes were predicted at the order, great-group, and subgroup levels and two approaches were tested. In the first approach, models were unconstrained based on previous predictions. In the second approach, models were constrained to predict only soil great-group classes that occur within the predicted soil order for a given location and similarly predict only soil subgroup classes that occur within the predicted soil great group for a given location. Determined through independent validation testing, the most probable predicted soil maps had overall accuracies ranging from 42% to 68% and kappa scores ranging from 0.33 to 0.48. Overall, the constrained models had the best performance of the approaches tested.
      Citation: Canadian Journal of Soil Science
      PubDate: 2022-06-13T07:00:00Z
      DOI: 10.1139/cjss-2022-0028
       
  • A proposed framework for assigning soil drainage classes to
           non-redoximorphic soils in the Canadian System of Soil Classification

    • Free pre-print version: Loading...

      Authors: Daniel D. Saurette, C. James (Jim) Warren, Richard J. Heck
      First page: 867
      Abstract: Canadian Journal of Soil Science, Ahead of Print.
      Drainage refers to the frequency and duration of periods of saturation, and how quickly excess water is removed from the soil profile. It is one of the central concepts used to differentiate soil series within the Canadian System of Soil Classification (CSSC). Currently, seven drainage classes are recognized in the CSSC: very rapid, rapid, well, moderately well, imperfect, poor, and very poor. In redoximorphic soils (imperfect, poor, and very poor drainage classes), drainage is typically differentiated based on morphological features (i.e., the presence of gleying and mottles). Non-redoximorphic soils (very rapid, rapid, and well-drained classes) do not display such morphological features but are differentiated based on available water holding capacity (AWHC) as inferred from soil texture and particle size. Moderately well-drained soils are intermediate, in some cases defined by the presence of redoximorphic characteristics, but in other cases inferred based on texture. In effect, drainage in materials without redoximorphic features is estimated based on AWHC as related to texture class, which should include sand subfractions. Values for AWHC were calculated using a published pedotransfer function for combinations of sand, silt, and clay-sized particles, including various combinations of very fine to very coarse sand separates as input. Calculated values were compared with currently assigned drainage classes and several inconsistencies were identified. Revisions are proposed to textural assessment of soil drainage for non-redoximorphic soils.
      Citation: Canadian Journal of Soil Science
      PubDate: 2022-05-11T07:00:00Z
      DOI: 10.1139/cjss-2022-0024
       
  • Magnetic phases of soils developed from igneous rocks in a climate
           gradient transept, Brazilian northern Amazonia

    • Free pre-print version: Loading...

      Authors: Aduan L. Silva, Roberto C. Araújo, Valdinar F. Melo, Cássio S. Sergio, Carlos Ernesto G.R. Schaefer
      First page: 879
      Abstract: Canadian Journal of Soil Science, Ahead of Print.
      Knowledge on magnetic phases and properties of magnetic minerals has wide applications in soils and in agriculture, by the possibility, and perspectives in application of rock magnetic methods in soil science and agriculture; however, their role in highly weathered soils is still unclear. We characterized the mineralogy of soils from Brazilian northern Amazonia, with emphasis on magnetic soils. Samples with varying weathering degrees were collected from four different localities, and their magnetic phases (MPs) were separated and subjected to the following analysis: X-ray fluorescence (XRF), X-ray diffractometry (XRD), and measurements of field and temperature magnetization. The chemical composition by XRF analyses revealed the predominance of Fe, Si, Ti, and Mn. The XRD analysis, using the Rietveld method, revealed the presence of hematite, goethite, maghemite, and magnetite as magnetic phases: The highest concentration of MPs was detected in an Fe-rich Typic Eutrudept (54% magnetite). Magnetization measurements of the magnetic phases showed the presence of magnetite, associated with hematite and goethite, with magnetization values and transition temperature characteristics of these minerals. The magnetization varied according to soil type, indicating different weathering processes. Soil magnetism varied as a function of parent igneous rocks, in the following order: diabase > basalt > granite. The results indicate that parent material and mineral weathering influence soil magnetism in a tropical climate.
      Citation: Canadian Journal of Soil Science
      PubDate: 2022-04-25T07:00:00Z
      DOI: 10.1139/cjss-2021-0171
       
  • Improving drought tolerance of Opuntia ficus-indica under field using
           subsurface water retention technology: changes in physiological and
           biochemical parameters

    • Free pre-print version: Loading...

      Authors: Soufiane Lahbouki, Lahoucine Ech-chatir, Salah Er-Raki, Abdelkader Outzourhit, Abdelilah Meddich
      First page: 888
      Abstract: Canadian Journal of Soil Science, Ahead of Print.
      The prickly pear (Opuntia ficus-indica) is an essential economic and ecological medicinal plant in arid and semi-arid areas, especially in Morocco, where water scarcity affects its survival and growth. Evidence suggests that subsurface water retention technology (SWRT) may enhance crops’ drought resistance. A field experiment was conducted to explore SWRT application effects on cactus cladodes’ growth and physiological and biochemical performance under drought conditions. Two water regimes were applied (rainfed conditions; irrigated with 4 L of water twice a week) with two treatments (without SWRT; with SWRT). The results showed that cactus cladodes’ growth and physiological and biochemical parameters cultivated for 8 months were negatively affected by drought. Drought-exposed cactus cladodes under SWRT application showed an increase in surface area and cladode stomatal densities by 65% and 29%, respectively, compared with no SWRT. This technology reduced drought-induced oxidative stress by mitigating malondialdehyde and hydrogen peroxide excess by 22% and 17%, respectively. Moreover, lower levels of enzymatic and nonenzymatic antioxidant activities were concluded, and soil organic matter and assimilable phosphorus contents were enhanced. In conclusion, our findings highlighted SWRT’s positive impacts on the tested parameters, thus presenting it as a promising technology for cactus growth and development improvement under water deficiency.
      Citation: Canadian Journal of Soil Science
      PubDate: 2022-05-17T07:00:00Z
      DOI: 10.1139/cjss-2022-0022
       
  • Beware of scaling artefacts and implicit model characteristics when
           fitting soil water release and moisture capacity data

    • Free pre-print version: Loading...

      Authors: W. Daniel Reynolds, Craig F. Drury
      First page: 899
      Abstract: Canadian Journal of Soil Science, Ahead of Print.
      The primary objectives of this study were to: (i) elucidate the impacts of nonlinear scale transformations on the shapes and parameter values of soil water release and moisture capacity curves; and (ii) demonstrate how implicit characteristics of some established soil water release and moisture capacity models can impact model-data fits and estimates of model parameters. Nonlinear scale transformations of the tension head (h) axis (e.g., log10 h, h1/2) were found to distort release and capacity curve shapes, create fictitious curve inflections and modes, and occasionally erase visual evidence of actual inflections and modes. The popular van Genuchten–Mualem and Assouline–Grant models were shown to always generate a release curve inflection and a capacity curve mode, even when inflections and modes did not exist in the data, and this in turn caused poor model-data fits in the critical near-saturated region. The van Genuchten model with four independently fitted parameters and the Dexter–Weibull model could accurately fit data sets with no inflection or mode, but this resulted in a physically unrealistic zero-angle intersection between the release curve and the water content axis. It was concluded that nonlinear h axis transforms should not be used when determining inflections, modes, pore size distributions, soil structure parameters, or soil quality indexes from soil water release and moisture capacity data-sets. It was also recommended that more flexible release curve models should be developed that do not assume the existence of inflections and modes, and also produce physically realistic angles of intersection between the water content axis and the fitted model.
      Citation: Canadian Journal of Soil Science
      PubDate: 2022-06-02T07:00:00Z
      DOI: 10.1139/cjss-2022-0003
       
  • Spatial variability of one-parameter model of soil water characteristic
           curve at field scale in black soil region of northeast China

    • Free pre-print version: Loading...

      Authors: Jizhen Li, Jilong Liu, Lingling Zhang, Qing Xu, Qiang Fu, Yaoyu Wu, Junfeng Chen, Hang Lv, Olga Idimesheva
      First page: 919
      Abstract: Canadian Journal of Soil Science, Ahead of Print.
      The soil water characteristic curve (SWCC) is an important parameter for simulating soil water movement and solute transport, and has obvious spatial variability. The models fitting the SWCC generally contain two or more parameters, which makes the spatial variability of the soil water characteristic curve difficult to express. This paper established a one-parameter model of the soil water characteristic curve based on the Gardner model and analyzed its spatial variability with multifractal and joint multifractal methods. Parameter B in the one-parameter model had moderate variation. The local information leading to spatial variability of parameter B in the top soil layer (0–15 cm) and deep soil layer (15–20 cm) was its low values and high values, respectively. At the single scale, spatial variability of parameter B was mainly caused by the bulk density and clay content in the 0–5 cm soil layer, and by the bulk density and sand content in the 5–10, 10–15, and 15–20 cm soil layers. At the multiscale, the most obvious two factors that led to spatial variability of parameter B were the bulk density and silt content in the 0–5 cm soil layer, bulk density and sand content in the 5–10 cm soil layer, and bulk density and clay content in the 10–15 and 15–20 cm soil layers, respectively. The relationships between parameter B and soil properties had scale dependence.
      Citation: Canadian Journal of Soil Science
      PubDate: 2022-06-02T07:00:00Z
      DOI: 10.1139/cjss-2021-0163
       
  • Effects of increasing soil pH to near-neutral using lime on phosphorus
           saturation index and water-extractable phosphorus

    • Free pre-print version: Loading...

      Authors: Sylvia Nyamaizi, Aimé J. Messiga, Jean-Thomas Cornelis, Sean M. Smukler
      First page: 929
      Abstract: Canadian Journal of Soil Science, Ahead of Print.
      We studied the effects of liming to increase soil pH from acidic to near-neutral on the degree of phosphorus saturation (DPS), the P saturation index (PSI), Mehlich-3 P (PM3), and water-extractable P (Pw). Soils collected from a long-term highbush blueberry experiment were incubated at 22.5 °C for 93 days after CaCO3 amendment to increase pH values from 4.1, 4.8, and 5.5 to 6 and from 5.8 to 6.5. Liming decreased PM3 by 8%, 6%, 10%, and 11% with increasing initial soil pH. The PM3 concentrations of all the studied soils belonged to the very high class with critical DPS > 25%, which are associated with increased environmental risk of P loss with runoff. For soils with initial pH values of 5.8, Pw was 3.65 mg kg–1 , in line with critical DPS > 25%, but decreased to 2.74 mg kg–1 with CaCO3 addition. In contrast, soils with initial pH  2500 mg kg–1) enhanced the fixation of phosphate ions from the soil solution, thus reducing Pw. Our results suggest that using PM3 as a sole indicator of environmental risk likely underestimates potential P losses compared with Pw.
      Citation: Canadian Journal of Soil Science
      PubDate: 2022-06-02T07:00:00Z
      DOI: 10.1139/cjss-2021-0197
       
  • Deep vertical rotary tillage increases the diversity of bacterial
           communities and alters the bacterial network structure in soil planted to
           corn

    • Free pre-print version: Loading...

      Authors: Wanyu Xia, Xiaoyue Ren, Yanyun Chen
      First page: 946
      Abstract: Canadian Journal of Soil Science, Ahead of Print.
      Deep vertical rotary tillage (DVRT) is a novel technique; however, its influence on soil bacterial diversity and community structure remains unclear. Herein, it was hypothesized that this tillage method significantly improves the bacterial diversity and alters the bacterial community structure and therefore it supports enhanced soil ecosystem functions in cultivated land. We investigated the soil bacterial communities and performed molecular ecological network analysis of cultivated land soils under different tillage regimes using high-throughput 16S rRNA gene Illumina sequencing. Soil samples were collected from the experimental field under 2 treatments: DVRT and conventional rotary tillage (CT) in Shizuishan City, Ningxia, China, in a 2-year field experiment. The α-diversity indices showed that DVRT resulted in higher bacterial diversity. In addition, the principal coordinate analysis results revealed a clear separation among the groups of cultivated land soils under the 2 treatment regimes. The key physicochemical factors that significantly influenced bacterial diversity and community structure were pH and total potassium concentration. The network analysis indicated that the bacterial network of DVRT soils consisted of more functionally interrelated bacterial modules than that of soils under CT, and the topological roles of characteristic bacteria and key bacteria were also different. In relation to CT, the relative abundances of organisms belonging to the functional groups of “Xenobiotics biodegradation and metabolism”, “Signal transduction”, and “Metabolism of cofactors and vitamins” were significantly increased in cultivated land soils under DVRT. It was concluded that DVRT treatment could improve bacterial diversity, alter the bacterial network structure, and enhance potential ecosystem functions in soils of cultivated land.
      Citation: Canadian Journal of Soil Science
      PubDate: 2022-06-02T07:00:00Z
      DOI: 10.1139/cjss-2021-0208
       
  • Analysis of mulched drip irrigation with brackish water in cotton fields
           using the HYDRUS-3D numerical model

    • Free pre-print version: Loading...

      Authors: Shan Yuyang, Su Lijun, Wang Quanjiu, Sun Yan, Mu Weiyi, Zhang Jihong, Wei Kai
      First page: 959
      Abstract: Canadian Journal of Soil Science, Ahead of Print.
      This study combined continuous monitoring in the field using computer modeling to understand soil water movement and salt transport so as to design a suitable irrigation system for cotton using mulched drip irrigation with brackish water. A reasonable irrigation regime was determined and verified using thresholds of water and salinity stress in the various stages of cotton growth. In addition, some key factors, such as emitter discharge rate, emitter spacing, and initial water content, were screened for simulation, and irrigation uniformity and desalination rate were selected as the indicators for evaluation. The results showed that: (i) The HYDRUS-3D model was a useful tool for designing suitable irrigation regimes, and the determined suitable irrigation quota was 5160 m3 hm−2 under mulched drip irrigation with brackish water during the growth period of cotton in 2019. (ii) The irrigation uniformity and leaching rate decreased with an increase in the emitter discharge, and the linear relationship between uniformity, leaching rate, and emitter discharge could be identified. (iii) The irrigation uniformity and leaching rate decreased with an increase in emitter spacing, and power functions might be used to calculate uniformity, leaching rate, and emitter spacing. (iv) The irrigation uniformity and leaching rate increased with an increase in initial water content, and the relationship between the two indexes and initial water content was defined by a linear function and a power function, respectively. These results provided a valuable reference for the rational use of drip irrigation with brackish water.
      Citation: Canadian Journal of Soil Science
      PubDate: 2022-06-17T07:00:00Z
      DOI: 10.1139/cjss-2022-0047
       
  • The impacts of rock pulverization on soil quality and functional soil
           nematode and respiration properties of boreal lands converted from forest
           to agricultural use

    • Free pre-print version: Loading...

      Authors: Erika H. Young, Jeremiah D. Vallotton, Amana J. Kedir, Ayodeji O. Medaiyese, Claudia Goyer, Louis-Pierre Comeau, Adrian Unc
      First page: 977
      Abstract: Canadian Journal of Soil Science, Ahead of Print.
      Rock pulverization is recommended when converting boreal forests to agricultural land use to facilitate tillage operations. Resulting rock dust incorporation might alter physical, chemical, and biological properties of soils. We assessed soil nematode trophic group abundances and indices, basal and burst respiration, and phosphorus extractability after land use conversion (LUC) and recent pulverization (
      Citation: Canadian Journal of Soil Science
      PubDate: 2022-07-05T07:00:00Z
      DOI: 10.1139/cjss-2022-0007
       
  • Water and salt transport characteristics in a soil column in the presence
           of a low-permeable body

    • Free pre-print version: Loading...

      Authors: Yi Guo, Quanjiu Wang, Yang Liu, Jihong Zhang, Kai Wei
      First page: 991
      Abstract: Canadian Journal of Soil Science, Ahead of Print.
      Soil water infiltration is an important factor affecting surface runoff, soil erosion, and soil solute transmission. Increasing soil infiltration reduces runoff and erosion. The presence of low-permeable body in soil can enhance soil infiltration capacity. However, different depths of low-permeable body have unknown effects on water infiltration and salt transfer. In this work, we evaluated the effects of low-permeable body with varied depths (control (CK), 0, 0.5, 1, and 1.5 cm) on silty loam soil water and salt movement using 15 soil columns (23 cm internal diameter, 50 cm length). Experimental results showed that low-permeable body increased infiltration rate and wetting front migration rate. Infiltration rate and wetting front propulsion rate decreased with the increase of the burial depth. Compared with the CK, when the depth of wetting front reached 20 cm, the infiltration time of 0, 0.5, 1, and 1.5 cm burial depth treatment was shortened by 72.24%, 56.29%, 44.61%, and 31.01%, respectively. Simultaneously, the existence of low-permeable body led to the increase of soil water content and salt content in the same soil layer, which indicated that the low-permeable body enhanced the soil holding capacity and reduced the salt leakage to the deep soil. Furthermore, the Philip’s model and the algebraic model were used to describe the infiltration process. Fitting results showed that the sorptivity in the Philip’s model increased with burial depth, while the comprehensive shape coefficient in the algebraic model decreased. Therefore, this study provides a reference for the application of low-permeable body in the improving soil infiltration capacity and controlling salt transport.
      Citation: Canadian Journal of Soil Science
      PubDate: 2022-07-05T07:00:00Z
      DOI: 10.1139/cjss-2022-0061
       
  • Nitrous oxide emissions from productive and degraded potato fields in the
           Fraser Valley delta of British Columbia

    • Free pre-print version: Loading...

      Authors: Chantel J. Chizen, Maja Krzic, T. Andrew Black, Rachhpal S. Jassal, Sean M. Smukler
      First page: 1000
      Abstract: Canadian Journal of Soil Science, Ahead of Print.
      Soil nitrous oxide (N2O) emissions and potato yield were evaluated under 0, 90, and 120 kg N ha−1 fertilizer rates and two planting dates, at productive and degraded fields in the Fraser Valley delta. During the growing season, N2O emissions were comparable among N fertilizer rates. Following November rainfall, N2O emissions increased by three times with 120 kg N ha−1. In the degraded field, yield did not respond to the increasing N fertilizer rates. These findings suggest that lower N fertilizer rates, especially in fields with degraded soils, can lower N2O emissions from British Columbia potato production.
      Citation: Canadian Journal of Soil Science
      PubDate: 2022-05-11T07:00:00Z
      DOI: 10.1139/cjss-2022-0032
       
  • Perennial grain Kernza® fields have higher particulate organic carbon at
           depth than annual grain fields

    • Free pre-print version: Loading...

      Authors: Laura K. van der Pol, Brian Nester, Brandon Schlautman, Timothy E. Crews, M. Francesca Cotrufo
      First page: 1005
      Abstract: Canadian Journal of Soil Science, Ahead of Print.
      Conversion from annual to perennial grains such as intermediate wheatgrass Kernza® could sequester soil organic carbon (SOC). To date, no studies have quantified SOC under Kernza on working farms. We sampled three sites with paired fields under annual grains and converted to Kernza 5–17 years ago to 100 cm and compared their SOC stocks as distributed between mineral-associated organic matter (MAOM) and particulate organic matter (POM). POM-C was higher under Kernza cultivation but total and MAOM-C were similar. Our findings suggest that Kernza increases SOC at depth as POM. Further study is needed to assess whether this will result in long-term SOC sequestration.
      Citation: Canadian Journal of Soil Science
      PubDate: 2022-09-23T07:00:00Z
      DOI: 10.1139/cjss-2022-0026
       
  • Correction: Soil organic carbon content: decreases partly attributed to
           dilution by increased depth of cultivation in southern Ontario

    • Free pre-print version: Loading...

      Authors: C.J. Warren, D.D. Saurette, A.W. Gillespie
      First page: 1010
      Abstract: Canadian Journal of Soil Science, Ahead of Print.

      Citation: Canadian Journal of Soil Science
      PubDate: 2022-10-28T07:00:00Z
      DOI: 10.1139/cjss-2022-0106
       
 
JournalTOCs
School of Mathematical and Computer Sciences
Heriot-Watt University
Edinburgh, EH14 4AS, UK
Email: journaltocs@hw.ac.uk
Tel: +00 44 (0)131 4513762
 


Your IP address: 35.172.230.154
 
Home (Search)
API
About JournalTOCs
News (blog, publications)
JournalTOCs on Twitter   JournalTOCs on Facebook

JournalTOCs © 2009-