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Showing 1 - 200 of 2350 Journals sorted alphabetically
3D Printing in Medicine     Open Access  
3D Research     Hybrid Journal   (Followers: 21, SJR: 0.214, h-index: 10)
4OR: A Quarterly J. of Operations Research     Hybrid Journal   (Followers: 10, SJR: 1.073, h-index: 25)
AAPS J.     Hybrid Journal   (Followers: 22, SJR: 1.192, h-index: 74)
AAPS PharmSciTech     Hybrid Journal   (Followers: 7, SJR: 0.718, h-index: 54)
Abdominal Imaging     Hybrid Journal   (Followers: 14, SJR: 0.723, h-index: 60)
Abhandlungen aus dem Mathematischen Seminar der Universitat Hamburg     Hybrid Journal   (Followers: 4, SJR: 0.447, h-index: 12)
Academic Psychiatry     Full-text available via subscription   (Followers: 23, SJR: 0.492, h-index: 32)
Academic Questions     Hybrid Journal   (Followers: 8, SJR: 0.135, h-index: 6)
Accreditation and Quality Assurance: J. for Quality, Comparability and Reliability in Chemical Measurement     Hybrid Journal   (Followers: 26, SJR: 0.378, h-index: 30)
Acoustical Physics     Hybrid Journal   (Followers: 11, SJR: 0.355, h-index: 20)
Acoustics Australia     Hybrid Journal  
Acta Analytica     Hybrid Journal   (Followers: 7, SJR: 0.387, h-index: 6)
Acta Applicandae Mathematicae     Hybrid Journal   (Followers: 1, SJR: 0.624, h-index: 34)
Acta Biotheoretica     Hybrid Journal   (Followers: 4, SJR: 0.419, h-index: 25)
Acta Diabetologica     Hybrid Journal   (Followers: 17, SJR: 1.318, h-index: 46)
Acta Endoscopica     Hybrid Journal   (Followers: 1, SJR: 0.113, h-index: 8)
acta ethologica     Hybrid Journal   (Followers: 4, SJR: 0.465, h-index: 23)
Acta Geochimica     Hybrid Journal   (Followers: 6)
Acta Geodaetica et Geophysica     Hybrid Journal   (Followers: 2, SJR: 0.294, h-index: 13)
Acta Geotechnica     Hybrid Journal   (Followers: 7, SJR: 1.818, h-index: 22)
Acta Informatica     Hybrid Journal   (Followers: 5, SJR: 0.524, h-index: 32)
Acta Mathematica     Hybrid Journal   (Followers: 12, SJR: 8.021, h-index: 47)
Acta Mathematica Hungarica     Hybrid Journal   (Followers: 2, SJR: 0.53, h-index: 29)
Acta Mathematica Sinica, English Series     Hybrid Journal   (Followers: 6, SJR: 0.406, h-index: 30)
Acta Mathematica Vietnamica     Hybrid Journal   (SJR: 0.451, h-index: 5)
Acta Mathematicae Applicatae Sinica, English Series     Hybrid Journal   (SJR: 0.22, h-index: 20)
Acta Mechanica     Hybrid Journal   (Followers: 21, SJR: 0.898, h-index: 52)
Acta Mechanica Sinica     Hybrid Journal   (Followers: 5, SJR: 0.426, h-index: 29)
Acta Metallurgica Sinica (English Letters)     Hybrid Journal   (Followers: 7, SJR: 0.525, h-index: 18)
Acta Meteorologica Sinica     Hybrid Journal   (Followers: 3, SJR: 0.524, h-index: 14)
Acta Neurochirurgica     Hybrid Journal   (Followers: 6, SJR: 0.833, h-index: 73)
Acta Neurologica Belgica     Hybrid Journal   (Followers: 1, SJR: 0.348, h-index: 27)
Acta Neuropathologica     Hybrid Journal   (Followers: 5, SJR: 6.61, h-index: 117)
Acta Oceanologica Sinica     Hybrid Journal   (Followers: 3, SJR: 0.295, h-index: 17)
Acta Parasitologica     Hybrid Journal   (Followers: 10, SJR: 0.581, h-index: 28)
Acta Physiologiae Plantarum     Hybrid Journal   (Followers: 2, SJR: 0.551, h-index: 39)
Acta Politica     Hybrid Journal   (Followers: 14, SJR: 0.658, h-index: 20)
Activitas Nervosa Superior     Hybrid Journal  
adhäsion KLEBEN & DICHTEN     Hybrid Journal   (Followers: 6, SJR: 0.103, h-index: 4)
ADHD Attention Deficit and Hyperactivity Disorders     Hybrid Journal   (Followers: 23, SJR: 0.871, h-index: 15)
Adhesion Adhesives & Sealants     Hybrid Journal   (Followers: 9)
Administration and Policy in Mental Health and Mental Health Services Research     Partially Free   (Followers: 16, SJR: 0.795, h-index: 40)
Adsorption     Hybrid Journal   (Followers: 4, SJR: 0.774, h-index: 52)
Advances in Applied Clifford Algebras     Hybrid Journal   (Followers: 4, SJR: 0.319, h-index: 15)
Advances in Atmospheric Sciences     Hybrid Journal   (Followers: 37, SJR: 0.959, h-index: 44)
Advances in Computational Mathematics     Hybrid Journal   (Followers: 19, SJR: 1.255, h-index: 44)
Advances in Contraception     Hybrid Journal   (Followers: 3)
Advances in Data Analysis and Classification     Hybrid Journal   (Followers: 51, SJR: 1.113, h-index: 14)
Advances in Gerontology     Partially Free   (Followers: 8, SJR: 0.141, h-index: 3)
Advances in Health Sciences Education     Hybrid Journal   (Followers: 27, SJR: 1.397, h-index: 42)
Advances in Manufacturing     Hybrid Journal   (Followers: 3, SJR: 0.2, h-index: 4)
Advances in Polymer Science     Hybrid Journal   (Followers: 43, SJR: 0.637, h-index: 89)
Advances in Therapy     Hybrid Journal   (Followers: 5, SJR: 0.79, h-index: 44)
Aegean Review of the Law of the Sea and Maritime Law     Hybrid Journal   (Followers: 6)
Aequationes Mathematicae     Hybrid Journal   (Followers: 2, SJR: 0.882, h-index: 23)
Aerobiologia     Hybrid Journal   (Followers: 3, SJR: 0.511, h-index: 36)
Aesthetic Plastic Surgery     Hybrid Journal   (Followers: 9, SJR: 0.821, h-index: 49)
African Archaeological Review     Hybrid Journal   (Followers: 16, SJR: 0.612, h-index: 24)
Afrika Matematika     Hybrid Journal   (Followers: 1, SJR: 0.248, h-index: 6)
AGE     Hybrid Journal   (Followers: 7, SJR: 1.358, h-index: 33)
Ageing Intl.     Hybrid Journal   (Followers: 7, SJR: 0.337, h-index: 10)
Aggiornamenti CIO     Hybrid Journal   (Followers: 1)
Aging Clinical and Experimental Research     Hybrid Journal   (Followers: 3, SJR: 0.529, h-index: 55)
Agricultural Research     Hybrid Journal   (Followers: 4)
Agriculture and Human Values     Hybrid Journal   (Followers: 14, SJR: 1.197, h-index: 49)
Agroforestry Systems     Hybrid Journal   (Followers: 19, SJR: 0.64, h-index: 56)
Agronomy for Sustainable Development     Hybrid Journal   (Followers: 12, SJR: 1.732, h-index: 59)
AI & Society     Hybrid Journal   (Followers: 8, SJR: 0.171, h-index: 19)
AIDS and Behavior     Hybrid Journal   (Followers: 13, SJR: 2.006, h-index: 71)
Air Quality, Atmosphere & Health     Hybrid Journal   (Followers: 4, SJR: 0.706, h-index: 19)
Akupunktur & Aurikulomedizin     Full-text available via subscription   (Followers: 1)
Algebra and Logic     Hybrid Journal   (Followers: 5, SJR: 0.566, h-index: 18)
Algebra Universalis     Hybrid Journal   (Followers: 2, SJR: 0.388, h-index: 22)
Algebras and Representation Theory     Hybrid Journal   (Followers: 1, SJR: 0.868, h-index: 20)
Algorithmica     Hybrid Journal   (Followers: 9, SJR: 0.898, h-index: 56)
Allergo J.     Full-text available via subscription   (Followers: 1, SJR: 0.183, h-index: 20)
Allergo J. Intl.     Hybrid Journal   (Followers: 2)
Alpine Botany     Hybrid Journal   (Followers: 5, SJR: 0.729, h-index: 20)
ALTEX : Alternatives to Animal Experimentation     Open Access   (Followers: 3, SJR: 1.392, h-index: 32)
AMBIO     Hybrid Journal   (Followers: 11, SJR: 1.094, h-index: 87)
American J. of Cardiovascular Drugs     Hybrid Journal   (Followers: 16, SJR: 0.864, h-index: 39)
American J. of Community Psychology     Hybrid Journal   (Followers: 27, SJR: 1.237, h-index: 83)
American J. of Criminal Justice     Hybrid Journal   (Followers: 8, SJR: 0.634, h-index: 13)
American J. of Cultural Sociology     Hybrid Journal   (Followers: 15, SJR: 0.283, h-index: 3)
American J. of Dance Therapy     Hybrid Journal   (Followers: 4, SJR: 0.175, h-index: 13)
American J. of Potato Research     Hybrid Journal   (Followers: 2, SJR: 0.558, h-index: 35)
American J. of Psychoanalysis     Hybrid Journal   (Followers: 20, SJR: 0.293, h-index: 13)
American Sociologist     Hybrid Journal   (Followers: 12, SJR: 0.18, h-index: 13)
Amino Acids     Hybrid Journal   (Followers: 8, SJR: 1.362, h-index: 83)
AMS Review     Partially Free   (Followers: 4)
Analog Integrated Circuits and Signal Processing     Hybrid Journal   (Followers: 7, SJR: 0.21, h-index: 37)
Analysis and Mathematical Physics     Hybrid Journal   (Followers: 5, SJR: 0.665, h-index: 7)
Analysis in Theory and Applications     Hybrid Journal   (Followers: 1)
Analysis of Verbal Behavior     Hybrid Journal   (Followers: 5)
Analytical and Bioanalytical Chemistry     Hybrid Journal   (Followers: 32, SJR: 1.096, h-index: 123)
Anatomical Science Intl.     Hybrid Journal   (Followers: 2, SJR: 0.301, h-index: 26)
Angewandte Schmerztherapie und Palliativmedizin     Hybrid Journal  
Angiogenesis     Hybrid Journal   (Followers: 3, SJR: 2.212, h-index: 69)
Animal Cognition     Hybrid Journal   (Followers: 19, SJR: 1.122, h-index: 55)
Annales françaises de médecine d'urgence     Hybrid Journal   (Followers: 1, SJR: 0.156, h-index: 4)
Annales Henri Poincaré     Hybrid Journal   (Followers: 3, SJR: 1.377, h-index: 32)
Annales mathématiques du Québec     Hybrid Journal   (Followers: 4)
Annali dell'Universita di Ferrara     Hybrid Journal   (SJR: 0.504, h-index: 14)
Annali di Matematica Pura ed Applicata     Hybrid Journal   (Followers: 1, SJR: 1.167, h-index: 26)
Annals of Biomedical Engineering     Hybrid Journal   (Followers: 18, SJR: 1.182, h-index: 94)
Annals of Combinatorics     Hybrid Journal   (Followers: 4, SJR: 0.849, h-index: 15)
Annals of Data Science     Hybrid Journal   (Followers: 11)
Annals of Dyslexia     Hybrid Journal   (Followers: 10, SJR: 0.857, h-index: 40)
Annals of Finance     Hybrid Journal   (Followers: 29, SJR: 0.686, h-index: 14)
Annals of Forest Science     Hybrid Journal   (Followers: 7, SJR: 0.929, h-index: 57)
Annals of Global Analysis and Geometry     Hybrid Journal   (Followers: 1, SJR: 1.136, h-index: 23)
Annals of Hematology     Hybrid Journal   (Followers: 16, SJR: 1.117, h-index: 62)
Annals of Mathematics and Artificial Intelligence     Hybrid Journal   (Followers: 12, SJR: 0.593, h-index: 42)
Annals of Microbiology     Hybrid Journal   (Followers: 10, SJR: 0.402, h-index: 26)
Annals of Nuclear Medicine     Hybrid Journal   (Followers: 4, SJR: 0.68, h-index: 45)
Annals of Operations Research     Hybrid Journal   (Followers: 10, SJR: 1.186, h-index: 78)
Annals of Ophthalmology     Hybrid Journal   (Followers: 12)
Annals of Regional Science     Hybrid Journal   (Followers: 7, SJR: 0.405, h-index: 42)
Annals of Software Engineering     Hybrid Journal   (Followers: 13)
Annals of Solid and Structural Mechanics     Hybrid Journal   (Followers: 9, SJR: 0.553, h-index: 8)
Annals of Surgical Oncology     Hybrid Journal   (Followers: 14, SJR: 1.902, h-index: 127)
Annals of Telecommunications     Hybrid Journal   (Followers: 9, SJR: 0.315, h-index: 25)
Annals of the Institute of Statistical Mathematics     Hybrid Journal   (Followers: 1, SJR: 0.931, h-index: 31)
Antonie van Leeuwenhoek     Hybrid Journal   (Followers: 5, SJR: 0.992, h-index: 87)
Apidologie     Hybrid Journal   (Followers: 4, SJR: 1.14, h-index: 57)
APOPTOSIS     Hybrid Journal   (Followers: 8, SJR: 1.554, h-index: 87)
Applicable Algebra in Engineering, Communication and Computing     Hybrid Journal   (Followers: 2, SJR: 0.354, h-index: 27)
Applications of Mathematics     Hybrid Journal   (Followers: 2, SJR: 0.274, h-index: 20)
Applied Biochemistry and Biotechnology     Hybrid Journal   (Followers: 43, SJR: 0.575, h-index: 80)
Applied Biochemistry and Microbiology     Hybrid Journal   (Followers: 17, SJR: 0.267, h-index: 26)
Applied Cancer Research     Open Access  
Applied Categorical Structures     Hybrid Journal   (Followers: 2, SJR: 0.361, h-index: 21)
Applied Composite Materials     Hybrid Journal   (Followers: 49, SJR: 0.705, h-index: 35)
Applied Entomology and Zoology     Partially Free   (Followers: 3, SJR: 0.554, h-index: 34)
Applied Geomatics     Hybrid Journal   (Followers: 3, SJR: 0.323, h-index: 9)
Applied Geophysics     Hybrid Journal   (Followers: 8, SJR: 0.541, h-index: 13)
Applied Intelligence     Hybrid Journal   (Followers: 12, SJR: 0.777, h-index: 43)
Applied Magnetic Resonance     Hybrid Journal   (Followers: 4, SJR: 0.358, h-index: 34)
Applied Mathematics & Optimization     Hybrid Journal   (Followers: 6, SJR: 0.955, h-index: 33)
Applied Mathematics - A J. of Chinese Universities     Hybrid Journal   (SJR: 0.275, h-index: 8)
Applied Mathematics and Mechanics     Hybrid Journal   (Followers: 5, SJR: 0.37, h-index: 26)
Applied Microbiology and Biotechnology     Hybrid Journal   (Followers: 63, SJR: 1.262, h-index: 161)
Applied Physics A     Hybrid Journal   (Followers: 9, SJR: 0.535, h-index: 121)
Applied Physics B: Lasers and Optics     Hybrid Journal   (Followers: 24, SJR: 0.983, h-index: 104)
Applied Psychophysiology and Biofeedback     Hybrid Journal   (Followers: 8, SJR: 0.677, h-index: 47)
Applied Research in Quality of Life     Hybrid Journal   (Followers: 11, SJR: 0.288, h-index: 15)
Applied Solar Energy     Hybrid Journal   (Followers: 18, SJR: 0.251, h-index: 6)
Applied Spatial Analysis and Policy     Hybrid Journal   (Followers: 4, SJR: 0.351, h-index: 9)
Aquaculture Intl.     Hybrid Journal   (Followers: 22, SJR: 0.613, h-index: 40)
Aquarium Sciences and Conservation     Hybrid Journal   (Followers: 1)
Aquatic Ecology     Hybrid Journal   (Followers: 33, SJR: 0.646, h-index: 44)
Aquatic Geochemistry     Hybrid Journal   (Followers: 4, SJR: 0.764, h-index: 39)
Aquatic Sciences     Hybrid Journal   (Followers: 13, SJR: 1.172, h-index: 53)
Arabian J. for Science and Engineering     Hybrid Journal   (Followers: 5, SJR: 0.345, h-index: 20)
Arabian J. of Geosciences     Hybrid Journal   (Followers: 2, SJR: 0.417, h-index: 16)
Archaeological and Anthropological Sciences     Hybrid Journal   (Followers: 20, SJR: 1.056, h-index: 15)
Archaeologies     Hybrid Journal   (Followers: 12, SJR: 0.397, h-index: 13)
Archiv der Mathematik     Hybrid Journal   (Followers: 1, SJR: 0.597, h-index: 29)
Archival Science     Hybrid Journal   (Followers: 59, SJR: 0.804, h-index: 22)
Archive for History of Exact Sciences     Hybrid Journal   (Followers: 8, SJR: 0.28, h-index: 15)
Archive for Mathematical Logic     Hybrid Journal   (Followers: 2, SJR: 0.946, h-index: 23)
Archive for Rational Mechanics and Analysis     Hybrid Journal   (SJR: 4.091, h-index: 66)
Archive of Applied Mechanics     Hybrid Journal   (Followers: 5, SJR: 0.865, h-index: 40)
Archives and Museum Informatics     Hybrid Journal   (Followers: 148)
Archives of Computational Methods in Engineering     Hybrid Journal   (Followers: 5, SJR: 2.841, h-index: 40)
Archives of Dermatological Research     Hybrid Journal   (Followers: 7, SJR: 0.9, h-index: 65)
Archives of Environmental Contamination and Toxicology     Hybrid Journal   (Followers: 14, SJR: 0.846, h-index: 84)
Archives of Gynecology and Obstetrics     Hybrid Journal   (Followers: 16, SJR: 0.695, h-index: 47)
Archives of Microbiology     Hybrid Journal   (Followers: 8, SJR: 0.702, h-index: 85)
Archives of Orthopaedic and Trauma Surgery     Hybrid Journal   (Followers: 8, SJR: 1.039, h-index: 56)
Archives of Osteoporosis     Hybrid Journal   (Followers: 2, SJR: 1.092, h-index: 13)
Archives of Sexual Behavior     Hybrid Journal   (Followers: 10, SJR: 1.198, h-index: 74)
Archives of Toxicology     Hybrid Journal   (Followers: 17, SJR: 1.595, h-index: 76)
Archives of Virology     Hybrid Journal   (Followers: 5, SJR: 1.086, h-index: 90)
Archives of Women's Mental Health     Hybrid Journal   (Followers: 14, SJR: 1.264, h-index: 50)
Archivio di Ortopedia e Reumatologia     Hybrid Journal  
Archivum Immunologiae et Therapiae Experimentalis     Hybrid Journal   (Followers: 2, SJR: 1.2, h-index: 42)
ArgoSpine News & J.     Hybrid Journal   (SJR: 0.102, h-index: 3)
Argumentation     Hybrid Journal   (Followers: 5, SJR: 0.295, h-index: 18)
Arid Ecosystems     Hybrid Journal   (Followers: 2)
Arkiv för Matematik     Hybrid Journal   (Followers: 1, SJR: 0.948, h-index: 22)
Arnold Mathematical J.     Hybrid Journal   (Followers: 1)
Arthropod-Plant Interactions     Hybrid Journal   (Followers: 2, SJR: 0.797, h-index: 17)
Arthroskopie     Hybrid Journal   (Followers: 1, SJR: 0.145, h-index: 8)
Artificial Intelligence and Law     Hybrid Journal   (Followers: 11, SJR: 0.288, h-index: 25)
Artificial Intelligence Review     Hybrid Journal   (Followers: 14, SJR: 0.948, h-index: 48)
Artificial Life and Robotics     Hybrid Journal   (Followers: 9, SJR: 0.231, h-index: 14)
Asia Europe J.     Hybrid Journal   (Followers: 5, SJR: 0.247, h-index: 9)
Asia Pacific Education Review     Hybrid Journal   (Followers: 12, SJR: 0.371, h-index: 17)
Asia Pacific J. of Management     Hybrid Journal   (Followers: 16, SJR: 1.676, h-index: 50)
Asia-Pacific Education Researcher     Hybrid Journal   (Followers: 12, SJR: 0.353, h-index: 13)
Asia-Pacific Financial Markets     Hybrid Journal   (Followers: 2, SJR: 0.19, h-index: 15)
Asia-Pacific J. of Atmospheric Sciences     Hybrid Journal   (Followers: 19, SJR: 1.006, h-index: 14)
Asian Business & Management     Hybrid Journal   (Followers: 9, SJR: 0.41, h-index: 10)
Asian J. of Business Ethics     Hybrid Journal   (Followers: 9)
Asian J. of Criminology     Hybrid Journal   (Followers: 5, SJR: 0.263, h-index: 8)
AStA Advances in Statistical Analysis     Hybrid Journal   (Followers: 2, SJR: 0.681, h-index: 15)
AStA Wirtschafts- und Sozialstatistisches Archiv     Hybrid Journal   (Followers: 5, SJR: 0.195, h-index: 5)
ästhetische dermatologie & kosmetologie     Full-text available via subscription  

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Journal Cover Agroforestry Systems
  [SJR: 0.64]   [H-I: 56]   [19 followers]  Follow
   Hybrid Journal Hybrid journal (It can contain Open Access articles)
   ISSN (Print) 1572-9680 - ISSN (Online) 0167-4366
   Published by Springer-Verlag Homepage  [2350 journals]
  • Preliminary phenotypic characterization of Sorbus domestica and S.
           torminalis under selection for timber production
    • Authors: Maria Claudia Piagnani; Claudio Costa; Gianfranco Minotta; Daniele Bassi
      Pages: 589 - 597
      Abstract: The current timber production in Italy covers only 20 % of the national demand. The national timber industry has been trying to increase the domestic production of sliced veneer logs from indigenous broadleaved species, which are largely employed by the furniture and interior design industry. The present work shows for the first time the results concerning the phenotypic characterizations of Sorbus domestica and Sorbus torminalis accessions under selection in the Po Valley (Northern Italy) for timber production: thirty-one S. domestica seedlings from three provenances—Toscanella (Northern Apennines, Italy), Serbia (from a research Institute), and Oxford (United Kingdom) botanical garden—and one hundred and twenty-five S. torminalis seedlings from a single mother tree, from the Northern Apennines (Italy), were classified for annual diameter and height increase into three groups. S. domestica seedlings were also evaluated according to ‘superior phenotypes’ scoring method. Six S. domestica ‘high-value’ ideotypes, scoring 20–42 % with respect to the comparison trees, were selected.
      PubDate: 2018-06-01
      DOI: 10.1007/s10457-016-9995-y
      Issue No: Vol. 92, No. 3 (2018)
  • Allometric equations for predicting above-ground biomass of selected woody
           species to estimate carbon in East African rangelands
    • Authors: Kenea Feyisa; Sheleme Beyene; Bekele Megersa; Mohammed Y. Said; de Leeuw Jan; Ayana Angassa
      Pages: 599 - 621
      Abstract: We developed species specific equations to predict aboveground biomass (AGB) of ten woody species in Borana rangelands of southern Ethiopia. A total of 150 plants 15 for each species were measured for biometric variables including the diameter at stump height (DSH), diameter at breast height (DBH), tree height (TH) and crown diameters were destructively harvested to obtain dry biomass. Many equations that related three biomass components: total aboveground, stem and branches to single or combination of predicator variables: DSH, DBH, TH, crown area (CA) and crown volume (CV) fit the data well to predict total AGB and by components for each of the species (adj.R2 > 0.80; P < 0.0001), but the form and variables comprising the best model varied among species. The total AGB of specifics (A. seyal, A. drepanolobium and A. etbaica and Lannea rivae) was significantly predicted from a combination of DSH, and CV and that of A.bussei species by the combination of DBH and CV, with a high adjusted coefficient of determination (adj.R2 > 0.80; P < 0.0001), whereas the combination of DBH and TH best predicted the total AGB and component biomass (stem and branch) of A. tortilis (umbrella canopy shape), with adj.R2 > 0.93; P < 0.0001. A generalized mixed-species allometric model developed from the pooled data of seven species was most accurately predicted by the combination of three predicators (DSH-TH-CA models), with adj. R2 between 0.84 and 0.90 for all AGB categories. Hence, our species-specific allometric models could be adopted for the indirect biomass estimation in semi-arid savanna ecosystem of southern Ethiopia. The mixed species allometric models will give a good opportunity when species-specific equations are not available and contribute to estimate the biomass and carbon stock in woody vegetations of East African rangelands.
      PubDate: 2018-06-01
      DOI: 10.1007/s10457-016-9997-9
      Issue No: Vol. 92, No. 3 (2018)
  • Ten years of seed production and establishment of regeneration
           measurements in Nothofagus antarctica forests under different crown cover
           and quality sites, in Southern Patagonia
    • Authors: Héctor A. Bahamonde; M. V. Lencinas; G. Martínez Pastur; L. Monelos; R. Soler; P. L. Peri
      Pages: 623 - 635
      Abstract: This study evaluated the seed production and quality and the subsequent regeneration establishment in five pure Nothofagus antarctica forests growing at different site qualities and crown cover during 10 years, in Southern Patagonia (Argentina). Four traps of 1 m2 were installed in each stand and sampled monthly (between February and May) each year. The incorporation and survival of seedlings were evaluated using four permanent plots of 1 m2 in each stand. The site quality of the studied forests did not influence seed production and regeneration. The amount of seed production and seed quality were proved to have a decisive influence on the N. antarctica seedling establishment in the subsequent years. At the same time, our results suggest that independently of the site class, the canopy openness for silvopastoral use improved the conditions for seedling establishment. However, the success of seedling survival over time would be conditioned for the influence of other factors such as understory competition.
      PubDate: 2018-06-01
      DOI: 10.1007/s10457-016-9999-7
      Issue No: Vol. 92, No. 3 (2018)
  • Mowed orchards of the thermophyticum in Central Europe as vanishing
           refugia for steppe spiders
    • Authors: Martin Čejka; Jaroslav Holuša; Hana Skokanová
      Pages: 637 - 642
      Abstract: Orchards on slopes with southern exposure and calcareous substrates are typical of the thermophyticum area of the Bohemian Basin. Because these slopes have long been maintained by mowing, they support semi-natural dry grassland stands and scrublands. These slopes are no longer mowed, however, and recently have become overgrown with grasses and subsequently with shrubs and woody plants. Pitfall traps were used to compare the abundance and community composition of spiders in two abandoned orchard sites in Central Bohemia: an orchard meadow site and shrubs site. Spider abundance was significantly greater at the orchard meadow site. Of the 62 species captured at both sites, 25 were found exclusively at the orchard meadow site. Xerothermic species of steppe spiders were detected at the orchard meadow site. The difference in spider abundance and community composition between the two sites presumably reflects changes in the habitat structure.
      PubDate: 2018-06-01
      DOI: 10.1007/s10457-016-0026-9
      Issue No: Vol. 92, No. 3 (2018)
  • Agroforestry in Bulgaria: history, presence status and prospects
    • Authors: Vania Kachova; Georgi Hinkov; Emil Popov; Lyubcho Trichkov; Rosa Mosquera-Losada
      Pages: 655 - 665
      Abstract: Agroforestry is a multifunctional, environmentally-friendly and modern system of land use by which we can reach economic, environmental and social benefits for the society. Bulgaria has achieved good results in the establishment of agroforestry practices, such as: protective forest belts, forest farming (agricultural use of forest areas), silvopasture (forest-grassland complexes). Moreover there are also legal basis and political understanding for promoting these types of systems. Missing, however, entire Concept and Strategy of supporting the development of agroforestry in the country. There is a strong need for the introduction and elaboration of best practices and new agroforestry technologies in the country where agricultural areas cover 47 % and forest areas 37 % from the territory. As a modern form of land use, agroforestry is a viable alternative for providing good income for land owners in many areas of the country, particularly these which livelihood are formed by a tobacco-production. Agroforestry can pushed up agricultural returns by diversification of production and can give many ecological and social benefits for society. The perspectives are targeted at the production of forest fruit tree species with high value tree timber, and forest farming.
      PubDate: 2018-06-01
      DOI: 10.1007/s10457-016-0029-6
      Issue No: Vol. 92, No. 3 (2018)
  • Estimation of stem and leaf dry biomass using a non-destructive method
           applied to African Coffea  species
    • Authors: P. Okoma; S. Akaffou; P. De Reffye; P. Hamon; S. Hamon; O. Konan; K. H. Kouassi; H. Legnate; V. Letort; S. Sabatier
      Pages: 667 - 675
      Abstract: The coffee tree is an important economic plant for several developing countries. Stem and leaf dry biomass, which are key traits of plant production, are used in functional-structural plant models to simulate plant growth and predict yield. These values are difficult to obtain since they classically rely on time-consuming protocols and require destructive measurements. Measuring stem and leaf dimensions (length and width) to estimate them provides a non-destructive and rapid approach for use in the field. In this study we sought the best allometric relationships existing between stem and leaf dimensions and their corresponding dry mass in order to avoid destructive measurements which are also time-consuming. This was investigated in three coffee species: Coffea canephora, Coffea liberica var. liberica and Coffea liberica var. dewevrei in Ivory Coast. For each species, the internodes and leaves of three axis categories (stem, branch and branchlet) comprising the main compartments were sampled. Two different equations were found to estimate the stem and leaf dry mass whatever the species and the axis categories: (1) a linear equation for the relation between the stem volume (V) and its corresponding dry mass (IWe), IWe = 0.70 × V and (2) a power law for the relation between the leaf area [as the product of length (LL) and width (Wi)] and its dry mass (LWe), LWe = 0.007 (LL × LWi)1.02. Finally, stem and leaf dry mass could be easily obtained without destructive measurements. This method could be applied to estimate the plant total leaf area and the total stem and leaf biomass of a plant in an agroforestry system.
      PubDate: 2018-06-01
      DOI: 10.1007/s10457-016-0031-z
      Issue No: Vol. 92, No. 3 (2018)
  • Broomcorn [ Sorghum bicolor (L.) Moench] responses to shade: an
           agroforestry system interface simulation
    • Authors: Ciro Abbud Righi; Dulcinéia Elizabete Foltran
      Pages: 693 - 704
      Abstract: Broomcorn is a sub-species of sorghum principally cultivated for its inflorescences, which take the form of panicles from which brooms are manufactured. Broomcorn cultivation is common on small properties, occupying marginal areas or grown in rotation with traditional crops. Despite the generalized use of plastics, there is a wide and increasing market for hand-made products fabricated from natural materials, which can represent a good opportunity for additional revenue to low-income families. There have been few studies on broomcorn, and, in particular, there are no reported scientific studies of the performance of this species of sorghum in agroforestry systems. In the present study, production into various organs of broomcorn (stem, leaves, panicle, and seeds) has been evaluated as a function of the availability of solar radiation, in order to assess the adaptive capacity of broomcorn. In a field study, broomcorn plants were submitted to solar radiation moderated by shading provided by adjacent trees, corresponding to different levels (IR) of full-sun irradiance, varying from 42 to 95%. The evaluated plant biomasses displayed close relationships with the available radiation. Out to distances slightly greater than their height, the shading trees had a negative influence on plant biomass production. Once the quantity of received radiation exceeded about 83% of that provided by full sun, the sorghum production displayed only small changes with further increases in available radiation. It did appear that a small reduction in the available radiation was beneficial, for production at IR = 88–92% was observed to be between 2 and 22% greater than under IR = 95%, depending on the production parameter considered. In response to a decrease in the irradiance, broomcorn showed an increased capacity to exploit solar radiation. Consideration of the current methods of agricultural production of broomcorn and the poverty of the small properties on which it is raised indicates that there are excellent prospects for success from the future cultivation of broomcorn within agroforestry systems. Additional beneficial factors are crop protection by the trees and conservation of forested areas. An agroforestry system will offer increased production from the broomcorn crop together with new products coming from the trees, and the start of small agriculture-based industries.
      PubDate: 2018-06-01
      DOI: 10.1007/s10457-016-0036-7
      Issue No: Vol. 92, No. 3 (2018)
  • Effect of drying methods on nutritional quality of young shoots and leaves
           of two Moringa species as non-conventional fodders
    • Authors: Elfadıl E. Babiker; Fahad A. L. Juhaimi; Kashif Ghafoor; Khalid A. Abdoun
      Pages: 717 - 729
      Abstract: The present study was conducted to compare the effect of partial shade (PS) and direct sun (DS) drying on the nutritional quality of young shoots and leaves of Moringa oleifera and Moringa peregrina as non-conventional fodder. The chemical composition, total energy, total and individual phenolics, ascorbic acid, carotenoids, antioxidant activity, amino acid and minerals composition of the leaves and young shoots of both species dried by either PS or DS were determined. The Student’s t test was used to compare the parameters obtained for the two drying methods. The results revealed that the effect on chemical composition varied between the two drying methods for both Moringa species. PS dried parts of both species showed significantly lower amount of total phenolics, but higher ascorbic acid and β-carotene. The antioxidant activity of sun dried parts was significantly (p ≤ 0.01) higher than those dried under partial shade. With few exceptions, for both species, PS drying resulted in higher amino acid and minerals contents. It could be concluded that drying method has a great impact on the studied parameters.
      PubDate: 2018-06-01
      DOI: 10.1007/s10457-016-0043-8
      Issue No: Vol. 92, No. 3 (2018)
  • Explaining the distribution of Rhabdopterus jansoni in coffee plantations:
           insights from diet breadth and preference
    • Authors: Zachary Hajian-Forooshani; Ryan Kuesel; David J. Gonthier
      Pages: 731 - 738
      Abstract: Understanding the factors that influence the dynamics of herbivory becomes a particularly important challenge when considering agricultural systems. Here we use the regionally specific herbivore of Coffea spp., Rhabdopterus jansoni (Jacoby) (Coleoptera: Chrysomelidae) and explore the potential factors which contribute to its dynamics and relative densities in coffee agroecosystems. Our experiments have shown that R. jansoni did not feed differentially on varieties of Coffea arabica, but preferred all varieties of Coffea arabica to Coffea canephora. No difference was found in R. jansoni’s preference for young or old coffee leaves, R. jansoni was more abundant in plantations of C. arabica relative to C. canephora, and finally, R. jansoni was found on 15 of 18 shade trees surveyed in the agroecosystem. Interestingly the lab preference experiments correspond to the relative densities of R. jansoni in the field, suggesting to us that field surveys may represent a metric of preference for some herbivores in agroecosystems. Additionally we discuss various factors to be considered when attempting to understand the role that shade trees may play in agroforestry systems.
      PubDate: 2018-06-01
      DOI: 10.1007/s10457-016-0044-7
      Issue No: Vol. 92, No. 3 (2018)
  • Factors influencing the adoption of riparian forest buffers in the Tuttle
           Creek Reservoir watershed of Kansas, USA
    • Authors: Thad K. Rhodes; Francisco X. Aguilar; Shibu Jose; Michael Gold
      Pages: 739 - 757
      Abstract: Environmental benefits of riparian forest buffers (trees located along streams) are well documented, yet an understanding of factors influencing landowner adoption on properties adjacent to agricultural fields is limited. Reasons for adoption and non-adoption were examined using survey data collected from landowners in Kansas’ Tuttle Creek Reservoir watershed, an area of high concern for water quality and quantity. Survey questionnaires focused on four latent adoption factors: attitudes toward trees, economic motivation, knowledge of riparian forest buffer benefits, and perceptions of government-funded incentive programs. Responses were analyzed with Spearman’s correlation coefficient to determine whether relationships existed between landowner type and each latent adoption factor, Cronbach’s alpha for scale reliability, and the Mann–Whitney U test for differences between adopters and non-adopters. Significant differences between landowner types were revealed indicating that riparian forest buffers were not likely to be adopted if landowners had unfavorable attitudes toward trees, were motivated by economic factors, were unaware of riparian forest buffer benefits, or had negative perceptions of the current design of government payment programs for establishing trees in riparian areas. The following themes were identified for their potential to increase adoption: riparian forest buffers need to be perceived as profitable; opportunities exist for education; financial and technical resources represent major constraints to riparian forest buffer adoption; and there is an apparent need to create awareness of financial assistance programs.
      PubDate: 2018-06-01
      DOI: 10.1007/s10457-016-0045-6
      Issue No: Vol. 92, No. 3 (2018)
  • Above-ground biomass models for coffee bushes ( Coffea arabica L.) in
           Líbano, Tolima, Colombia
    • Authors: Hernán J. C. Andrade; Milena A. Segura; Mateo Feria; Wilber Suárez
      Pages: 775 - 784
      Abstract: Biomass models are practical and useful tools to estimate biomass of perennial wood plants in land use systems that mitigate climate changes, such as coffee plantations. In Colombia, biomass models for coffee (Coffea arabica L.) have not been developed. These models have been built through destructive sampling of 40 individuals of Caturra and Castillo cultivars that grow in the most dominant coffee production systems in the municipality of Líbano, Tolima, Colombia: (1) monoculture; (2) agroforestry systems (AFS) with plantain (Musa AAB); (3) AFS with Spanish elm (Cordia alliodora (Ruiz & Pavon) Oken)); and (4) organic. The bushes were measured (trunk diameter at 15 cm high, D 15, and total height, ht), cut at ground level, and their biomass was estimated gravimetrically by component (trunks, branches, leaves and fruits). Correlation analysis between dependent and independent variables were carried out, and generic models with linear and transformed variables were tested. Biomass models by component, and total, with R2 of 0.62–0.88, including D 15 and ht as an independent variable were found. However, for practical purposes, a total above-ground biomass model was developed exclusively based on D 15 [B = 0.36 − 0.18 * D 15 + 0.08 * D 15 2 ; R2 = 0.82; where B: total above-ground biomass (kg/plant)]. These models represent practical tools in carbon fixation studies and nutrient cycling.
      PubDate: 2018-06-01
      DOI: 10.1007/s10457-016-0047-4
      Issue No: Vol. 92, No. 3 (2018)
  • Impact of agroforestry parklands on crop yield and income generation: case
           study of rainfed farming in the semi-arid zone of Sudan
    • Authors: Mustafa Kamil Mahmoud Fahmi; Dafa-Alla Mohamed Dafa-Alla; Markku Kanninen; Olavi Luukkanen
      Pages: 785 - 800
      Abstract: National food security has been a major policy goal in Sudan since the country gained its independence in 1956. One of the fundamental reasons is to ensure the social welfare for people living in rural areas. In this study we aimed to analyse how farmers secure their food and generate income in the semi-arid Sennar state in Sudan, using two selected sites, El Dali and El Mazmum, as examples. We interviewed 281 randomly sampled household heads, of which 145 at El Dali and 136 at El Mazmum, between July and November 2011. We identified four distinct land use systems, of which three consist of monocropping and one of cultivation in agroforestry parklands. Several statistical techniques and economic analysis were applied on the study data. Our results show that, in the two areas, the highest average yields over a 10-year period for the three crops studied, sorghum, pearl millet and sesame, were achieved in agroforestry system, except for the case of sesame at El Mazmum. Economic returns for the farmers, as indicated by net present value or benefit/cost ratio, followed the same pattern. The study concludes that farmers should rely more on agroforestry to improve their food security and cash income generation. Land use and land right policies, which currently discourage farmers from growing trees on their lands, should be revised, so as to give more incentive to them to adopt ecologically and economically more sustainable land use practices.
      PubDate: 2018-06-01
      DOI: 10.1007/s10457-016-0048-3
      Issue No: Vol. 92, No. 3 (2018)
  • Advances in European agroforestry: results from the AGFORWARD project
    • Authors: Paul J. Burgess; Adolfo Rosati
      Abstract: In global terms, European farms produce high yields of safe and high quality food but this depends on the use of many off-farm inputs and the associated greenhouse gas emissions, loss of soil nutrients and other negative environmental impacts incur substantial societal costs. Farmers in the European Union receive support through a Common Agricultural Policy (CAP) that comprises direct payments to farmers (Pillar I) and payments related to rural development measures (Pillar II). This paper examines the ways in which agroforestry can support European agriculture and rural development drawing on the conclusions of 23 papers presented in this Special Issue of Agroforestry Systems which have been produced during a 4-year research project called AGFORWARD. The project had the goal of promoting agroforestry in Europe and focused on four types of agroforestry: (1) existing systems of high nature and cultural value, and agroforestry for (2) high value tree, (3) arable, and (4) livestock systems. The project has advanced our understanding of the extent of agroforestry in Europe and of farmers’ perceptions of agroforestry, including the reasons for adoption or non-adoption. A participatory approach was used with over 40 stakeholder groups across Europe to test selected agroforestry innovations through field trials and experiments. Innovations included improved grazing management in agroforestry systems of high nature and cultural value and the introduction of nitrogen fixing plants in high value timber plantations and olive groves. Other innovations included shelter benefits for arable crops, and disease-control, nutrient-retention, and food diversification benefits from integrating trees in livestock enterprises. Biophysical and economic models have also been developed to predict the effect of different agroforestry designs on crop and tree production, and on carbon sequestration, nutrient loss and ecosystems services in general. These models help us to quantify the potential environmental benefits of agroforestry, relative to agriculture without trees. In view of the substantial area of European agroforestry and its wider societal and environmental benefits, the final policy papers in this Special Issue argue that agroforestry should play a more significant role in future versions of the CAP than it does at present.
      PubDate: 2018-06-09
      DOI: 10.1007/s10457-018-0261-3
  • Predicting the potential impact of climate change on the declining
           agroforestry species Borassus aethiopum Mart. in Benin: a mixture of
           geostatistical and SDM approach
    • Authors: Valère Kolawolé Salako; Romaric Vihotogbé; Thierry Houéhanou; Idelphonse Akoeugnigan Sodé; Romain Glèlè Kakaï
      Abstract: Predicted effects of climate change (CC) on plant species distribution have raised concerns on their conservation and domestication. Appropriate stand density may enhance species ability to adapt to CC. Therefore, combining species distribution modeling (SDM) and spatial pattern of density should provide insightful information for setting conservation actions. We combined geostatistical and SDM techniques to assess (1) current tree density spatial pattern and its relationship with bioclimatic zone (humid, sub-humid, and semi-arid), land-use type (protected areas vs. agrosystems), and soil type (eight types), and (2) present-day and future distributions of suitable habitats under low-RCP4.5 and high-RCP8.5 emissions scenarios for Borassus aethiopum, a declining agroforestry palm in Benin. Data were obtained from 2880 one-ha plots. Semivariogram and kriging were used to model spatial patterns of density while Maximum Entropy was used for SDM. Tree density followed an isotropic spatial model with a range of 2.15 km, indicating extremely fragmented density pattern. Tree density was 8-times higher in protected areas (PAs, 68.6 ± 5.09 trees ha−1) than in agrosystems (8.4 ± 0.31 trees ha−1) and greater on ferruginous soils. Though 80% of the country was currently highly suitable with similar trend for PAs and agrosystems, future predictions showed major habitat loss (20–61%), particularly under RCP8.5. While changes were similar between PAs and agrosystems, the decrease in habitat suitability was pronounced in the semi-arid zone where the species is currently widely-distributed with higher abundance. Very weak link was found between present-day abundance and present-day and future distribution. It is concluded that B. aethiopum has a fragmented density pattern and will be sensitive to CC. In-situ and circa-situ conservations or orchards establishment were suggested depending on the projected changes and the bioclimatic zone. The approach used here is exemplary for other agroforestry tree species.
      PubDate: 2018-06-07
      DOI: 10.1007/s10457-018-0262-2
  • Targeting educational needs based on natural resource professionals’
           familiarity, learning, and perceptions of silvopasture in the southeastern
    • Abstract: Natural Resource Professionals (NRPs) are commonly regarded as the front lines of agriculture and forest management innovations, including silvopasture, an agroforestry practice. Yet, as silvopasture is a departure from more traditional land management practices, many NRPs may not have the expertise or training to help landowners make informed decisions. Targeted training of professionals may prove beneficial. Through a web survey of NRPs with cooperative extension, Natural Resource Conservation Service (NRCS), state forestry services, and private foresters in Alabama, Georgia, Mississippi, and Florida, we found that 64% of respondents are “somewhat” or “very familiar” with silvopasture and 54% have participated in a silvopasture field day. Rates of silvopasture training were highest for NRPs in the NRCS (78%) lowest for registered foresters (29%) (p < .001 Chi square = 55.367) and highest in Alabama (67%) and Mississippi (63%), and lowest in Georgia (41%) (p < .01). Perceptions of the physiographic suitability for silvopasture were lowest in Mississippi (p = .02; test statistic 14.632; DF = 3). The state forestry service NRPs and NRPs in Mississippi and Georgia present strong opportunities for education regarding silvopasture.
      PubDate: 2018-06-07
      DOI: 10.1007/s10457-018-0260-4
  • Quantitatively characterizing the floristics and structure of a
           traditional homegarden in a village landscape, Sri Lanka
    • Authors: Meredith Martin; Klaus Geiger; B. M. P. Singhakumara; Mark S. Ashton
      Abstract: Our study examined the species composition and vegetative structure of traditional homegardens within the context of the surrounding land use mosaic typical of village lands in the southwest region of Sri Lanka. We conducted interviews and spatially mapped the land uses of a single traditional village comprising over thirty households. After mapping the different land uses for each household we selected ten households and conducted a census of the vegetation of their land use areas. Land use categories included homegarden, patio, rubber, tea plantation, and secondary forest and scrub. Land holdings varied in size between 0.18 and 1.34 hectares and comprised 39% tea land, 27% homegarden, 12% patio, 17% secondary forest and scrub land, and 4% rubber plantation. We identified a total of 268 plant species on the ten properties in a total of 216 genera and 84 families across all growth habits combined (trees, shrubs, herbs and climbers). Our results show three times the plant species richness in homegardens than for any similar research on tree gardens elsewhere, but a large proportion are exotic and almost all have some kind of utilitarian purpose. The top three tree species are palms in homegardens which represent over two-thirds of the stem density and half the basal area. The conservation activities within tree gardens emphasizes the crucial—but perhaps undervalued—role local livelihoods and land management activities play in retaining tree species diversity comparable but dramatically differing in taxa as compared to the original rain forest.
      PubDate: 2018-06-04
      DOI: 10.1007/s10457-018-0254-2
  • Carbon storage in a silvopastoral system compared to that in a deciduous
           dry forest in Michoacán, Mexico
    • Authors: José G. López-Santiago; Fernando Casanova-Lugo; Gilberto Villanueva-López; Víctor F. Díaz-Echeverría; Francisco J. Solorio-Sánchez; Pablo Martínez-Zurimendi; Deb R. Aryal; Alfonso J. Chay-Canul
      Abstract: Livestock production in the tropics contributes significantly to global greenhouse gas emissions, so better understanding the role of silvopastoral systems (SPS) in mitigating such emissions is necessary. The aim of this study was to evaluate the amounts of carbon stored in the biomass and soil organic carbon (SOC) components of a Leucaena leucocephala cum Panicum maximum silvopasture system (SPS) compared to a deciduous tropical forest (DTF), and a grass monoculture (GM) in Michoacán, Mexico. The above- and below-ground biomass were measured by destructive sampling in the SPS and GM, while previously reported allometric equations were used to quantify biomass stocks in the DTF. The SOC concentration up to 30 cm was determined by dry combustion method. The SPS and DTF contained more aboveground biomass (41.8 ± 3.30 and 36.7 ± 5.72 Mg DM ha−1) compared to GM (8.0 ± 0.76 Mg DM ha−1). However, the SPS exhibited greater belowground biomass (16.4 ± 1.95 Mg DM ha−1) than the other systems. The DTF had the highest SOC fraction in all depth classes with values ranging from 3.1 ± 0.07% to 3.7 ± 0.06%, respectively, compared to the other systems. The total carbon stocks in SPS was similar to DTF (120.7 ± 10.97 vs. 120.9 ± 6.38 Mg C ha−1) but was significantly higher than GM (78.2 ± 8.41 Mg C ha−1). In dry tropical conditions, SPS displays enormous potential for increasing biomass and soil carbon stocks compared to the GM and can thus be used as a greenhouse gas mitigation strategy in livestock production systems.
      PubDate: 2018-06-04
      DOI: 10.1007/s10457-018-0259-x
  • Functions for aboveground biomass estimation derived from satellite images
           data in Mediterranean agroforestry systems
    • Authors: Ana Cristina Gonçalves; Adélia M. O. Sousa; Paulo Mesquita
      Abstract: Forest biomass has been having an increasing importance in the world economy and in the evaluation of the forests development and monitoring. The main goal of this study is the development of functions for the estimation of aboveground biomass, using crown cover as independent variable, for Quercus rotundifolia, Quercus suber and Pinus pinea in agroforestry systems, both for monospecies and multispecies stands, based on Portuguese data. Crown cover per specie was derived from crown horizontal projection obtained by processing very high spatial resolution satellite images (Quickbird and Worldview-2), with contrast split segmentation method and object-oriented classification. The stand species composition distinguished species and monospecies from multispecies stands. The best model was the one with crown cover and dummy variables for composition as explanatory variables, reflecting the differences between species and stand structure. Aboveground biomass with this function should ideally be calculated with the grid areas applied in this study, though similar accuracies can be obtained for other grid sizes.
      PubDate: 2018-06-02
      DOI: 10.1007/s10457-018-0252-4
  • Biomass and buffer management practice effects on soil hydraulic
           properties compared to grain crops for claypan landscapes
    • Authors: Salah M. Alagele; S. H. Anderson; R. P. Udawatta
      Abstract: Biomass production systems as well as agroforestry and grass buffers have been found to improve soil hydraulic properties and water quality relative to row crop management for temperate regions. Objectives of this study were to assess the effects of biomass crops, agroforestry buffers, and grass buffers grown on claypan soils relative to a traditional corn (Zea mays L.)–soybean (Glycine max L.) rotation for hydraulic properties which included saturated hydraulic conductivity (Ksat), soil water retention, bulk density, and pore size distributions. Experiment was conducted in northeastern Missouri, USA. Buffers and biomass crops were established in 1997 and 2012, respectively. Grain crop production watersheds were established in 1991. Agroforestry buffers consisted of grasses and forbs with pin oak (Quercus palustris Muenchh.) trees. Redtop (Agrostis gigantea Roth), brome grass (Bromus spp.), and birdsfoot trefoil (Lotus Corniculatus L.) were planted in grass buffer areas. Biomass crops included switchgrass (Panicum Virgatum L.) and native grasses. Undistributed soil cores (7.6 cm diam. by 7.6 cm long) were taken by 10 cm depth increments with six replications from the surface to the 40 cm depth. Samples were measured and evaluated for bulk density, Ksat, water retention, and pore size distributions. Results illustrated that bulk density values were significantly lower (P < 0.01) for the buffer treatments and biomass crops compared to the row crop treatment averaged across depths. Significantly greater Ksat occurred for biomass crops and agroforestry buffers than row crops affected by soil depth, particularly at the soil surface 0–10 and 10–20 cm depths. Macropores (> 1000 µm effective diam.) and coarse mesopores (60–1000 µm effective diam.) were significantly higher for the biomass treatment than the other treatments for the first depth 0–10 cm. Although the claypan soil horizon dominates hydrology in northeastern Missouri, this study showed that biomass crops as well as agroforestry and grass buffer practices improve soil hydraulic properties relative to row crop management; they also have valuable economic and environmental benefits.
      PubDate: 2018-06-02
      DOI: 10.1007/s10457-018-0255-1
  • Edaphic and climatic factors and the nutrient dynamics in Uapaca kirkiana
           dominated miombo woodland agroforestry ecosystems
    • Authors: K. Ramachela
      Abstract: Soil and foliar analysis were used to investigate influence of edaphic and climatic factors on the soil–plant nutrient dynamics in Uapaca kirkiana dominated woodland ecosystem in Zimbabwe. Examination of the relationship between soil factors and foliar nutrient concentrations as analysed by multiple regression analysis showed that between 60 and 97% of the variations in foliar nutrient concentrations during the wet period, with the exception of nitrogen, could be explained by soil factors: soil nutrient content, texture and pH. In the dry winter period, influence of these soil factors on foliar nutrient content was in the range between 48 and 97%. Factors that had significant influence (P < 0.05) were particularly exhibited during the wet period and these were those influencing foliar P, Fe, Mn and Zn. Multiple regression analysis between climatic factors and foliar nutrients showed temperature had a statistically significant negative relationship with Fe whilst precipitation had a highly significant positive relationship with Fe during the dry winter period. Correlation between foliar Fe and rainfall was negatively statistically significant during the rainy period (P < 0.05) and became positively statistically highly significant during the dry period (P < 0.01). There was also a highly statistically significant negative relationship between the total annual rainfall and foliar nitrogen during the dry winter period. Findings of the study highlight importance of both soil and climatic factors on soil–plant nutrient dynamics in the miombo ecosystem, and should therefore be taken into consideration when establishing U. kirkiana in an agroforestry system.
      PubDate: 2018-06-02
      DOI: 10.1007/s10457-018-0256-0
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