Subjects -> AGRICULTURE (Total: 963 journals)
    - AGRICULTURAL ECONOMICS (93 journals)
    - AGRICULTURE (662 journals)
    - CROP PRODUCTION AND SOIL (120 journals)
    - POULTRY AND LIVESTOCK (58 journals)

AGRICULTURE (662 journals)            First | 1 2 3 4     

Showing 201 - 263 of 263 Journals sorted by number of followers
Biodiversity     Hybrid Journal   (Followers: 28)
Agriculture & Food Security     Open Access   (Followers: 22)
Future of Food : Journal on Food, Agriculture and Society     Open Access   (Followers: 21)
Nature Plants     Full-text available via subscription   (Followers: 17)
African Journal of Food, Agriculture, Nutrition and Development     Open Access   (Followers: 17)
Advances in Agriculture     Open Access   (Followers: 16)
Agricultural History Review     Full-text available via subscription   (Followers: 15)
Indian Journal of Agricultural Sciences     Open Access   (Followers: 12)
Advances in Life Science and Technology     Open Access   (Followers: 11)
Biological Agriculture & Horticulture : An International Journal for Sustainable Production Systems     Partially Free   (Followers: 11)
Journal of Land and Rural Studies     Hybrid Journal   (Followers: 11)
Agriculture and Food Sciences Research     Open Access   (Followers: 10)
Agricultural Research     Hybrid Journal   (Followers: 10)
Indian Horticulture     Full-text available via subscription   (Followers: 9)
Culture, Agriculture, Food and Environment     Hybrid Journal   (Followers: 8)
Arboricultural Journal : The International Journal of Urban Forestry     Hybrid Journal   (Followers: 7)
Aceh International Journal of Science and Technology     Open Access   (Followers: 7)
International Journal of Agriculture and Forestry     Open Access   (Followers: 7)
New Journal of Botany     Hybrid Journal   (Followers: 6)
Invertebrate Reproduction & Development     Hybrid Journal   (Followers: 6)
Journal of Agriculture and Sustainability     Open Access   (Followers: 6)
Journal of Agriculture and Social Research (JASR)     Open Access   (Followers: 6)
American Journal of Rural Development     Open Access   (Followers: 6)
Journal of Agriculture, Forestry and the Social Sciences     Full-text available via subscription   (Followers: 6)
Journal of Advances in Agriculture     Open Access   (Followers: 5)
Acta Scientiarum. Animal Sciences     Open Access   (Followers: 5)
EvoDevo     Open Access   (Followers: 5)
Italian Journal of Agronomy     Open Access   (Followers: 4)
Cereal Chemistry     Full-text available via subscription   (Followers: 4)
Studies in Australian Garden History     Full-text available via subscription   (Followers: 4)
Journal of Agricultural Science     Open Access   (Followers: 4)
Journal of Agriculture and Rural Development in the Tropics and Subtropics     Open Access   (Followers: 4)
Tanzania Journal of Agricultural Sciences     Open Access   (Followers: 4)
Journal of Modern Agriculture     Open Access   (Followers: 4)
EU Agrarian Law     Open Access   (Followers: 4)
Journal of Agricultural Extension and Rural Development     Open Access   (Followers: 4)
Acta Agrobotanica     Open Access   (Followers: 4)
Food and Energy Security     Open Access   (Followers: 4)
Journal of the Ghana Science Association     Full-text available via subscription   (Followers: 3)
Journal of Agriculture and Natural Resources Sciences     Open Access   (Followers: 3)
Journal of Science and Technology (Ghana)     Open Access   (Followers: 3)
Biocatalysis and Agricultural Biotechnology     Hybrid Journal   (Followers: 3)
Revista Verde de Agroecologia e Desenvolvimento Sustentável     Open Access   (Followers: 3)
Sustainable Agriculture Research     Open Access   (Followers: 3)
International Journal of Agricultural Research, Innovation and Technology     Open Access   (Followers: 3)
International Journal of Applied Agriculture and Apiculture Research     Open Access   (Followers: 3)
Agra Europe     Full-text available via subscription   (Followers: 3)
Journal of Essential Oil Research     Hybrid Journal   (Followers: 3)
Diatom Research     Hybrid Journal   (Followers: 3)
Acta Universitatis Sapientiae, Alimentaria     Open Access   (Followers: 3)
Journal of Food Security     Open Access   (Followers: 3)
Journal of Agricultural Chemistry and Environment     Open Access   (Followers: 3)
Asian Journal of Medical and Biological Research     Open Access   (Followers: 3)
Rural China     Hybrid Journal   (Followers: 2)
Revista Cubana de Ciencia Agrícola     Open Access   (Followers: 2)
Rivista di Studi sulla Sostenibilità     Full-text available via subscription   (Followers: 2)
Nigerian Food Journal     Full-text available via subscription   (Followers: 2)
Tropical Agricultural Research     Open Access   (Followers: 2)
International Journal of Agricultural Management and Development     Open Access   (Followers: 2)
Tropical Agricultural Research and Extension     Open Access   (Followers: 2)
New Zealand Journal of Agricultural Research     Hybrid Journal   (Followers: 2)
International Journal for Parasitology : Parasites and Wildlife     Open Access   (Followers: 2)
Journal of Apicultural Science     Open Access   (Followers: 2)
Ciencia forestal en México     Open Access   (Followers: 2)
Agricultura Tropica et Subtropica     Open Access   (Followers: 2)
Journal of Biology, Agriculture and Healthcare     Open Access   (Followers: 2)
Journal of Sustainable Society     Open Access   (Followers: 2)
Journal of Agricultural Extension     Open Access   (Followers: 2)
Journal of Agriculture and Food Sciences     Full-text available via subscription   (Followers: 2)
Journal of Agricultural Engineering     Open Access   (Followers: 2)
Huria : Journal of the Open University of Tanzania     Full-text available via subscription   (Followers: 2)
Agro-Science     Full-text available via subscription   (Followers: 2)
Rural Sustainability Research     Open Access   (Followers: 2)
Ghana Journal of Agricultural Science     Full-text available via subscription   (Followers: 2)
Journal of Agricultural Studies     Open Access   (Followers: 1)
Berkala Ilmiah Pertanian     Open Access   (Followers: 1)
Journal of Natural Sciences Research     Open Access   (Followers: 1)
Agricultural Commodities     Full-text available via subscription   (Followers: 1)
Progressive Agriculture     Open Access   (Followers: 1)
COCOS : The Journal of the Coconut Research Institute of Sri Lanka     Open Access   (Followers: 1)
Jurnal Veteriner     Open Access   (Followers: 1)
Nigerian Journal of Technological Research     Full-text available via subscription   (Followers: 1)
Science, Technology and Arts Research Journal     Open Access   (Followers: 1)
Revista Brasileira de Higiene e Sanidade Animal     Open Access   (Followers: 1)
Wartazoa. Indonesian Bulletin of Animal and Veterinary Sciences     Open Access   (Followers: 1)
Archivos de Zootecnia     Open Access   (Followers: 1)
Folia Horticulturae     Open Access   (Followers: 1)
Acta Technologica Agriculturae     Open Access   (Followers: 1)
International Journal of Agricultural Extension     Open Access   (Followers: 1)
Frontiers in Science     Open Access   (Followers: 1)
Emirates Journal of Food and Agriculture     Open Access   (Followers: 1)
Research in Agriculture, Livestock and Fisheries     Open Access   (Followers: 1)
Journal of Agricultural Engineering     Full-text available via subscription   (Followers: 1)
Buletin Peternakan : Bulletin of Animal Science     Open Access   (Followers: 1)
RIA. Revista de Investigaciones Agropecuarias     Open Access   (Followers: 1)
Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca : Food Science and Technology     Open Access   (Followers: 1)
Journal of Degraded and Mining Lands Management     Open Access   (Followers: 1)
Global Approaches to Extension Practice : A Journal of Agricultural Extension     Full-text available via subscription   (Followers: 1)
Plant Knowledge Journal     Open Access   (Followers: 1)
Iranian Journal of Applied Animal Science     Open Access   (Followers: 1)
Agrociencia Uruguay     Open Access   (Followers: 1)
Chemical and Biological Technologies for Agriculture     Open Access   (Followers: 1)
International Journal of Recycling of Organic Waste in Agriculture     Open Access   (Followers: 1)
Journal of Science Foundation     Open Access   (Followers: 1)
Annals of Agricultural Sciences     Open Access   (Followers: 1)
Avances en Investigacion Agropecuaria     Open Access   (Followers: 1)
International Journal of Sustainable Agricultural Management and Informatics     Hybrid Journal   (Followers: 1)
Bangladesh Journal of Agricultural Research     Open Access   (Followers: 1)
Journal of Agricultural Sciences     Open Access   (Followers: 1)
Jurnal Ilmu dan Kesehatan Hewan (Veterinary Science and Medicine Journal)     Open Access   (Followers: 1)
Innovare Journal of Agricultural Science     Open Access   (Followers: 1)
Arquivos do Instituto Biológico     Open Access   (Followers: 1)
Social and Natural Sciences Journal     Open Access  
Jurnal Agroteknologi     Open Access  
Perspectivas Rurales Nueva Época     Open Access  
Organic Farming     Open Access  
Research Ideas and Outcomes     Open Access  
Jurnal Udayana Mengabdi     Open Access  
Landtechnik : Agricultural Engineering     Open Access  
International Letters of Natural Sciences     Open Access  
International Journal of Agriculture System     Open Access  
Heliyon     Open Access  
Ciência e Técnica Vitivinícola     Open Access  
Oilseeds and fats, Crops and Lipids     Open Access  
Annals of Silvicultural Research     Open Access  
Pastura : Journal Of Tropical Forage Science     Open Access  
Journal of Citrus Pathology     Open Access  
Revista Iberoamericana de las Ciencias Biológicas y Agropecuarias     Open Access  
Kansas Agricultural Experiment Station Research Reports     Open Access  
International Journal of Secondary Metabolite     Open Access  
Scientia Agropecuaria     Open Access  
Pelita Perkebunan (Coffee and Cocoa Research Journal)     Open Access  
Revista de Agricultura Neotropical     Open Access  
Cogent Food & Agriculture     Open Access  
Fave : Sección ciencias agrarias     Open Access  
Revista de Ciências Agrárias     Open Access  
Review of Agrarian Studies     Open Access  
Nigerian Journal of Biotechnology     Open Access  
Nigeria Agricultural Journal     Full-text available via subscription  
Annales des Sciences Agronomiques     Full-text available via subscription  
Journal of the Bangladesh Agricultural University     Open Access  
Journal of Buffalo Science     Hybrid Journal  
Revista de Ciências Agroveterinárias     Open Access  
Tropical Grasslands - Forrajes Tropicales     Open Access  
Research in Plant Sciences     Open Access  
World Journal of Agricultural Research     Open Access  
Universal Journal of Agricultural Research     Open Access  
Research & Reviews : Journal of Agriculture Science and Technology     Full-text available via subscription  
Revue Marocaine des Sciences Agronomiques et Vétérinaires     Open Access  
Nativa     Open Access  
SAARC Journal of Agriculture     Open Access  
West African Journal of Applied Ecology     Open Access  
Journal of Agricultural Research and Development     Full-text available via subscription  
Journal de la Recherche Scientifique de l'Universite de Lome     Full-text available via subscription  
Global Journal of Agricultural Sciences     Full-text available via subscription  
Agrosearch     Open Access  
Agronomie Africaine     Full-text available via subscription  
Professional Agricultural Workers Journal     Open Access  
Interciencia     Open Access  
Nepal Journal of Science and Technology     Open Access  
Journal of the Saudi Society of Agricultural Sciences     Open Access  
Information Processing in Agriculture     Open Access  
Sabaragamuwa University Journal     Open Access  
Ceiba     Open Access  
Research in Sierra Leone Studies : Weave     Open Access  
The Agriculturists     Open Access  
La Calera     Open Access  
Selçuk Tarım ve Gıda Bilimleri Dergisi     Open Access  
Revista de la Universidad del Zulia     Open Access  
Journal of Arid Land     Hybrid Journal  
Rangifer     Open Access  
Encuentro     Open Access  
Journal Of Agrobiotechnology     Open Access  
Coffee Science     Open Access  
Bangladesh Journal of Scientific Research     Open Access  
Landbohistorisk Tidsskrift     Open Access  
Biotecnología en el Sector Agropecuario y Agroindustrial     Open Access  
Walailak Journal of Science and Technology     Open Access  
Universidad y Ciencia     Open Access  
Tropical and Subtropical Agroecosystems     Open Access  
Terra Latinoamericana     Open Access  
Revista Iberoamericana de Tecnologia Postcosecha     Open Access  
Revista Brasileira de Ciências Agrárias     Open Access  
Multiciencias     Open Access  
Ensaios e Ciência : Ciências Biológicas, Agrárias e da Saúde     Open Access  
Bioagro     Open Access  
Agroalimentaria     Open Access  
Revista Mexicana de Ciencias Agrícolas     Open Access  
Revista U.D.C.A Actualidad & Divulgación Científica     Open Access  
Revista Ciencias Técnicas Agropecuarias     Open Access  
Revista Chapingo. Serie horticultura     Open Access  
Pastos y Forrajes     Open Access  
Fitosanidad     Open Access  
Cultivos Tropicales     Open Access  
Cuadernos de Desarrollo Rural     Open Access  
Ciencia e Investigación Agraria     Open Access  
Agronomía Mesoamericana     Open Access  
Agronomía Costarricense     Open Access  
Agrociencia     Open Access  
Agrivita : Journal of Agricultural Science     Open Access  

  First | 1 2 3 4     

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Journal Cover
Journal of Agricultural Science
Number of Followers: 4  

  This is an Open Access Journal Open Access journal
ISSN (Print) 1916-9752 - ISSN (Online) 1916-9760
Published by CCSE Homepage  [43 journals]
  • Reviewer Acknowledgements for Journal of Agricultural Science, Vol. 14,
           No. 12

    • Abstract: Reviewer acknowledgements for Journal of Agricultural Science, Vol. 14, No. 12, 2022.
      PubDate: Mon, 14 Nov 2022 11:54:37 +000
  • Long-Term Organic Inputs Determine Soil Productivity Better in
           Sorghum-Cowpea Rotation Than in Sorghum Monoculture

    • Abstract: Information on long-term fertilization combined with crop rotation can contribute to better management of West African Lixisols. There is little information on how long-term organic inputs influence soil chemical properties under cereal monoculture versus a rotation with a legume. Here, we investigated how fertilization regimes with emphasis on organic inputs influence soil chemical properties in sorghum monoculture compared to sorghum-cowpea rotation. The long-term field trial of Saria in Burkina Faso, which has been in operation since 1960, was used for this purpose. Soils were sampled at the 0-20 cm depth to determine their organic C, total N, total P, mineral N, available P, pHwater, exchangeable basic cations, and cation exchange capacity. The best soil properties were exhibited with the application of 40 t ha-1 of manure. Recycling of sorghum residues combined with mineral fertilization led to a decrease in mineral N and available P but maintained a higher level of total N and P compared to exclusive mineral fertilization. Organic inputs determined soil properties and sorghum yield better (R2 = 0.89) in rotation than in monoculture. Our results show that a better productivity of the studied Lixisol requires an application of manure at more than 5 t ha-1 combined with mineral fertilization. In addition, a rotation including a legume and a regular recycling of crop residues is necessary.
      PubDate: Mon, 14 Nov 2022 11:43:34 +000
  • Spatial Variability of the Organic Matter in the Soil in Cassava
           Cultivation Under Differentiated Management

    • Abstract: The management of soil organic matter (SOM) is fundamental in agriculture for soil conservation and crop yields. However, in addition the soil being dynamics, it is heterogeneous, therefore, understanding the spatial variability of SOM is essential. The main objective of this study was to evaluate the spatial variability of SOM in a cassava cultivation under different management, seeking to classify its spatial dependence by geostatistics. A filed experiment was conducted out on soil classified as oxisol with four different management systems: irrigation (micro sprinkler, drip and no irrigation), spacing (1.0 × 0.8 m, 1.0 × 1.0 m and 1.0 × 1.5 m), weed control (manual control and no control) and acidity correction (limestone and withouth limestone), totaling 36 experimental plots. To determine the SOM, the wet oxidation method was used, and the semivariograms were generated by the GS+® software. The effect of the different management systems on the spatial variability of the SOM was evaluated at a depth of 0.0-0.2 m. The theoretical semivariogram model that best fitted the study was the Gaussian model, with a well-defined level, also expressing the condition of data stationarity. The spatial dependence was classified as strong and, through the thematic map generated from the kriging, it was possible to observe the variability in the SOM content for different management zones. The use of geostatistics techniques provided important information for understanding the spatial distribution of soil organic matter.
      PubDate: Mon, 14 Nov 2022 11:38:57 +000
  • The Use of Volume Yield and the Number of Trees to Control Forest
           Management Operations and Combat Illegal Harvesting

    • Abstract: There is a lack of understanding on the relationship between the authorized volume of wood harvest in Sustainable Forest Management Plans (SFMP) in the Amazon, the volumes listed in the official systems of volume control, the actual harvested volumes, and the consequences these parameters have for the illegal wood market.The objective of this study was to evaluate the production and volume yield and the number of harvested trees as part of forest management plans in public and private forests through analysis of harvest data from 85 SFMP registered in the official electronic system of control of forest products in the state of Pará. The forest management plans were categorized into public (federal and state), and private, with these being further subdivided into having one or more than one annual production unit, and community-managed forest. This analysis was based on the hypothesis that production and volume yield from SFMP in public and private forests did not differ. Calculations were made to test this hypothesis, and these included forest harvest yield, the percentage of the number of trees harvested in the SFMP using the relationship between the authorized and harvested volumes as well as the numbers of authorized trees and those harvested.The results show that the yields based on numbers of trees and volumes were statistically lower for SFMP in public forests compared to private forests. These results suggest that a significant part of SFMP in private forests could systematically become a source of forest credits used to obtain fraudulent documents for forest products that are illegally harvested, which is referred to as “esquentamento” in Portuguese.
      PubDate: Mon, 14 Nov 2022 11:35:27 +000
  • Identification and Characterization of Fusarium Species Associated With
           Amaranth (Amaranthus Species) Wilt Disease in the Semi-deciduous and
           Guinea Savannah Agro-ecological Zones of Ghana

    • Abstract: Fusarium wilt is a major constraint in amaranth production in Africa; the disease can lead to total crop failure. However, few studies have identified Fusarium species associated with amaranth diseases in Ghana. The study was conducted to identify Fusarium species causing wilt in amaranth in the Semi-deciduous and Guinea Savannah
      Agro-ecological zones of Ghana and determine variations in isolates. Using standard laboratory procedures, fungal pathogens were isolated and culture characteristics studied. Variations in virulence were determined using root dip method. Sequence analysis of the internal transcribed spacer region of isolates was carried out for species identfication. Based on morphological features complemented by sequence analysis; Fusarium equiseti, F. oxysporum, F. solani and F. proliferatum were identified. Fusarium equiseti was the dominant species appearing in 82% of isolates. All the isolates were pathogenic. Based on virulence level, 9% of the isolates were classified as very highly virulent whilst 56% were weakly virulent. Genetically, isolates clustered into four groups irrespective of origin. The work identified and classified Fusarium species causing amaranth wilt in Ghana.
      PubDate: Mon, 14 Nov 2022 11:29:50 +000
  • Performance and Fruit Ripening of Red Orange Tree Grafted onto Two

    • Abstract: The cultivar Sanguínea de Mombuca (Citrus sinensis [L.] Osbeck) bears lycopene-rich fruits with attractive red pulp and high nutritional value; thus, this cultivar has the potential to diversify orchards for the production of fruits for natural consumption and juice. Therefore, studies on the productive performance in combination with rootstocks are required. This study evaluated the phenological cycles, yield, ripening curve, and fruit quality of this cultivar grafted onto ‘Rangpur’ lime and ‘Swingle’ citrumelo. The study was conducted in the Midwest of the state of São Paulo, in the subtropical region of southeastern Brazil, and the field experiment was performed over two consecutive seasons. Rootstocks had little effect on the duration of the phenological cycles. The fruit ripening curve predicted the time of harvest as approximately 240 days after anthesis, regardless of rootstock. Fruits harvested from trees grafted onto ‘Swingle’ citrumelo showed higher levels of soluble solids and sugars and higher technological indices. The larger number of fruits and greater fresh weight confirmed that better yield performance occurred with the trees grafted onto the ‘Rangpur’ lime as opposed to the ‘Swingle’ citrumelo rootstock.
      PubDate: Mon, 14 Nov 2022 11:26:38 +000
  • Involvement of Women in Adopting Climate Change Adaptation Practices in
           Cacao Farming in Côte d’Ivoire

    • Abstract: The adverse effects of climate change are leading producers to adopt endogenous strategies. Nevertheless, the involvement of women in the adoption of adaptation practices was assessed in the localities of Abengourou, Gagnoa, Soubré and Vavoua. Interviews with cocoa farmers, 69 female and 288 male, show that drought (77.8%) is one of the most observed climatic factors by farmers in cocoa farms. In order to reduce the effects, 27% of women farmers preferred to set up nurseries close to water points and at home, compared to 15.2% of men. 73.7% Women leave the plants for 4 months before planting compared to 59.2% of men. In soil fertility management, 67.9% of women use leguminous plants as cover crops, compared to 52.8% of men. During the rainy season, they ferment the beans for 6 days (35% compared to 22% of men) and harvest the pods at least once a week (16% compared to 1% of men) in the absence of rain. Women are strongly involved in the adoption of practices at all stages of cocoa production. In terms of adaptation, it would be important that the practices identified be integrated into the training of women producers to enable them to be resilient.
      PubDate: Mon, 14 Nov 2022 11:23:29 +000
  • Thermo-physical Properties and Oxidative Stability of the Oil of Babassu
           Palm (Attalea vitrivir Zona, Arecaceae)

    • Abstract: Population growth and the concern about its environmental impact have increased the demand for vegetable oils in recent years. Vegetable oils are used in several industry sectors and have been investigated as an alternative energy source to replace traditional fossil fuels. Knowledge of physical and chemical properties is essential to assess the potential use of vegetable oil in the production of biofuels. The present study aimed to determine the oxidative stability of the seed oil of the babassu palm tree, Attalea vitrivir, native to the Brazilian cerrado and originated from two different regions, before and after storage for 12 months. The relative density of the oil did not differ between regions and did not change over time. Kinematic viscosity was lower for area 1 and increased with storage in oils from both areas. The induction period in the Rancimat test was lower in area 2 and decreased in the stored oil, regardless of the area, though it remained higher than the minimum required for its use as biofuel. The evaluation of oxidation by the oven method also showed satisfactory results, confirming the high thermo-oxidative stability of the babassu oil rich in lauric acid.
      PubDate: Mon, 14 Nov 2022 11:20:32 +000
  • Using Sulphonated Silicon Nutrient Solution with S8 Elemental Sulfur and
           Changing Planting Arrangement in Potato Winter Cultivation

    • Abstract: This experiment with aims to increase the tuber yield and quality by using sulphonated silicon nutrient solution with S8 and changing the planting arrangement in potato winter cultivation was investigated in Potato Research Station of Ardabil Province, IRAN during 2022. This experiment was carried out based on the factorial experimental design in three factors and three repetitions. The first factor with two levels including: (1) Spring cultivation and (2) Winter cultivation; the second factor consists of two levels: (1) The planting arrangement of one row on one stack, and (2) The arrangement of planting two rows on one stack in a zigzag pattern and the third factor with three levels includes: (1) Spraying on tuber and soil before planting and foliar spraying in three stages of vegetative growth, tuberization and tuber bulking with a dose of 5 liter nutrient solution in 1000 liters of water per hectare, (2) Foliar spraying in three stages of vegetative growth, tuberization and tuber bulking with a dose of 5 liter nutrient solution of S8 in 1000 liters of water per hectare, and 3. Control (without sulphonated silicon nutrient solution of S8) were. The irrigation method was in the form of drip irrigation. During the growth period, plant height, number of main stems per plant, tuber number and weight per plant and tuber yield were measured. By using nutrient solution and changing the planting arrangement (two rows on one stack) increased tuber yield, tuber number and weight per plant, plant height and water use efficiency in winter and spring cultivation.
      PubDate: Mon, 14 Nov 2022 11:14:06 +000
  • Parametric Models of Covariance Matrices for Repeated Measures: A
           Simulation Study on Fit, Error and Statistical Power in Mixed Linear

    • Abstract: The premise in experiments with repeated measures is that observations taken in the same experimental unit are correlated and that correlations decrease proportionally to the increase in the distance between measurements in time or space. Nevertheless, these experiments are often analyzed as if the correlations between the repeated measures were constant or using methods that only consider correlations different, which may impact on the rejection rate of the null hypothesis, and ultimately type I error rate and statistical power. In this context, this study investigated the application of mixed linear models with different assumptions about the covariance matrix in data sets from simulated experiments with repeated measures. 84 scenarios that varied in terms of the covariance matrix pattern (14 structures), number of repeated measurements (4 and 8) and sample size (4, 8 and 12) were evaluated. 10,000 data sets were simulated for each scenario based on a multivariate normal distribution and were subsequently analyzed using mixed linear models. Type I error rate and statistical power for the hypothesis test of the interaction between treatments and repeated measures were estimated as the proportion of p values less than or equal to 0.01 or 0.05 out of a total of 10,000 tests for each scenario. The models were also evaluated for their ability to fit the data using Bayesian Information Criteria (BIC). Thus, the frequency with which the covariance structures were chosen by the selection criteria was computed. Results indicate that the assumption chosen most frequently by the information criteria resulted from the specified covariance structure that corresponded to the empirical covariance structure of the analyzed data sets, particularly for those with larger number of repeated measures and sample sizes. Results also indicate that the use of covariance models that do not recognize heterogeneous correlations between repeated measures can inflate type I error or reduce it to very conservative levels, which may affect the conclusion of agricultural experiments. For a 5% significance level, type I error bias was greater than 2α, while for 1% significance level, bias was over 5α. In addition, the statistical power was reduced when the assumption about the covariance matrix of the data sets did not correspond to the empirical covariance structure, particularly for those data sets with a smaller sample size.
      PubDate: Mon, 14 Nov 2022 10:59:57 +000
  • Confirmation of 4-Hydroxyphenylpyruvate Dioxygenase Inhibitor-Resistant
           and 5-Way Multiple-Herbicide-Resistant Waterhemp in Ontario, Canada

    • Abstract: This is the first confirmation of 4-hydroxyphenylpyruvate dioxygenase-(HPPD)-inhibitor resistant waterhemp and the first report of 5-way multiple-herbicide-resistant (MHR) waterhemp in Ontario to Group 2, 5, 9, 14, and 27 herbicides. Seed was collected across southern Ontario in 2021 and tested for resistance to imazethapyr, atrazine, metribuzin, glyphosate, lactofen, mesotrione, and mesotrione + atrazine representing Group 2, 5, 5, 9, 14, 27, and 27 + 5 herbicides, respectively. All of the waterhemp populations collected in 2021 had 4-way resistance to imazethapyr, atrazine, glyphosate, and mesotrione. In seven Ontario counties, 5-way resistant waterhemp was confirmed which includes resistance to the HPPD-inhibiting herbicides.
      PubDate: Mon, 14 Nov 2022 10:02:24 +000
  • Genotypic Yield Stability of Wild and Landrace Sorghum Species Under
           Drought Stress and Striga Infestation

    • Abstract: Recurring drought stress cycles and widespread striga (Striga hermonthica (Del.) Benth) infestations are two of the major constraints of sorghum production in sub-Saharan Africa (SSA) where they cause a crop loss of about 60 billion US dollars and affect a population of about 100 M people annually. Plant breeders continue to employ conventional and molecular crop breeding strategies in the search for durable genetic resistance/tolerance mechanisms or for germplasm with genes against these two constraints. Crop wild relatives and landraces remain valuable resources of resistance/tolerance genes and have been utilized in the past to improve tolerance to drought stress and resistance to striga. The aim of this study was to assess the stability of performance of 64 sorghum wild relatives, landraces and progenies from some generation of crosses under striga infested and drought stress conditions in agroecological environments endemic for these two stresses. The performance of the genotypes under drought stress was assessed in well-watered and in water stressed conditions at the Kenya Agricultural Livestock Research Organization (KALRO) Kiboko Research Centre whereas the same set was evaluated under striga artificially infested field and potted trials at the KALRO Alupe Research Centre during 2018/2019 rainy seasons. Genotypes, B35 × ICSV III N, Macia, N13, ICSV 111 IN, F6YQ212 × B35, SRN39, GENO47293, ICSV 111 IN × B35, IS9830, Framida, GENO 45827, F6YQ212, B35 × AKUOR ACHOT were found to maintain stable high yields in both striga and drought conditions. The results here, showed that Genotype, Genotype × Environment (GGE) interaction partitioned genotypes in two of the four mega-environments according to their stability and mean grain yield (GY) and identified representative genotypes of the two traits that could be exploited to develop superior sorghum varieties adapted to drought and striga prone environments.
      PubDate: Mon, 14 Nov 2022 09:59:31 +000
  • Potential of Bluetooth Wireless Technology as a Tool for Agricultural

    • Abstract: Information and Communication Technology (ICT) provides opportunities to improve farmers’ livelihoods. Bluetooth wireless technology (BWT) is a simple cellphone-based innovation that can significantly reduce the cost of disseminating information to farmers. A two-stage survey was conducted in Ghana in 2011 and 2012 to: (i) appraise cellphone ownership, cost, and the existence of BWT, and (ii) assess the potential of using BWT to disseminate information to farmers on grain storage technology. The survey was conducted in four districts in the Northern and Ashanti regions of Ghana. Results of the appraisal study show that there were 27 cellphones for about 1,000 people, with 20% owned by women. The majority (78%) of phones were purchased new for $20 or less. About half (48%) of the cellphones had BWT. The follow-up study showed that most respondents learned (91.7%) and received (88.3%) the videos on grain storage (Purdue Improved Crop Storage-PICS) technology via BWT from extension agents. Three-fourths of the respondents watched the PICS videos on their cellphones six times or more. Among those who received the PICS videos, each viewed and shared it with nine and seven more people, respectively. The overall results support the effective use of BWT embedded in basic phones as a tool for conveying agricultural extension messages to farmers. Development partners and extension services should take advantage of BTW embedded in basic phones to improve access to agricultural and health information.
      PubDate: Mon, 14 Nov 2022 09:55:34 +000
  • Rural Household Food Consumption in Bengkulu, Indonesia: Estimating a
           Demand System Based on SUSENAS Microdata

    • Abstract: The paper aims to estimate the food demand of rural households in Bengkulu Province, Indonesia, using the Quadratic Almost Ideal Demand System (QUAIDS) and microdata from the SUSENAS. We aggregate food into five groups: staple food, animal food, vegetables & fruits, prepared food, and other food. The results show that demand for animal food is the most sensitive to food expenditure, whereas the demand for staple food is the most expenditure-inelastic. Staple food, animal food, vegetables & fruits, and other food are substitutes for each other. On the other hand, prepared food and staple food complement each other. Other food is the easiest to be substituted, and staple food is the most difficult to be substituted. The demographic variables, as well as prices and expenditures, impact household demand. For example, as family size increases, the demand for staple food increases, while the demand for animal food, vegetables & fruits decreases. The number of children under five years old has a positive impact on animal food demand but a negative impact on staple food and other food demand. Staple farmer households have a higher need for staple food than non-agricultural households. Due to being unmarried, divorced or bereaved, single households have a lower demand for staple food but a higher demand for prepared food. We mainly imply that the food price stabilization policy should emphasize animal food, especially beef and poultry, without increasing prices.
      PubDate: Mon, 14 Nov 2022 09:53:27 +000
  • Effect of Two Different Irrigation Strategies on the Yield Components of
           Five Rice Varieties in a Cold Mediterranean climate in the South-Central
           Zone of Chile

    • Abstract: Rice is one of the agricultural species that consumes a lot of water. In countries with cold climates such as Chile, a 200 mm high sheet of water is used to cope with night temperatures below 10 °C. This practice consumes 18,000 m3 ha-1 of water per season. Climate change is currently a major problem, where the reduction in precipitation can exceed 40%. Under this context, the current rice production system is unsustainable. The objective of the research seeks to evaluate five rice varieties with different lengths of the productive cycle, under two water management strategies (intermittent vs. traditional irrigation), evaluating the yield components of rice varieties. The trial was conducted in the Mediterranean climate of South-Central Chile, zone is characterized by low temperatures. The traditional commercial variety used was Zafiro (Oryza sativa sp. japonica), which showed good yields under flood irrigation conditions with 8,100 and 7,300 kg/ha for both seasons, respectively. However, under intermittent irrigation conditions, it showed a drastic yield reduction of 94 and 42% for both seasons, respectively. While the short-cycle variety MA042, showed yields of 12,663 and 11,063 kg/ha under flood irrigation strategy for both seasons, while under AWD system it showed only 34 and 4% reduction, respectively. The use of short cycle varieties, which require less water and are more tolerant to low temperatures, represent a productive option for rice farmers in cold climates, where water resources are an increasingly scarce commodity.
      PubDate: Mon, 14 Nov 2022 09:51:29 +000
School of Mathematical and Computer Sciences
Heriot-Watt University
Edinburgh, EH14 4AS, UK
Tel: +00 44 (0)131 4513762

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