Changes in soil properties following conversion of Acacia senegal plantation to other land management systems in North Kordofan State,Sudan |
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| Authors: | BA El Tahir DM Ahmed J Ardö AM Gaafar AA Salih |
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| Institution: | 1. Department of Human Geography, Planning and International Development, University of Amsterdam, Plantage Muidergracht 14, 1018 TV Amsterdam, The Netherlands;2. Faculty of Renewable Natural Resources (FRNR), Kwame Nkrumah University of Science and Technology (KNUST), Kumasi, Ghana;3. Department of Silviculture and Forest Management, Faculty of Renewable Natural Resources (FRNR), Kwame Nkrumah University of Science and Technology (KNUST), Kumasi, Ghana;1. Department of Symbiotic Science of Environment and Natural Resources, Tokyo University of Agriculture and Technology, Fuchu, Tokyo, Japan;2. Department of International Environmental and Agriculture Science, Tokyo University of Agriculture and Technology, Fuchu, Tokyo, Japan;3. Department of Ecosystem Science and Sustainability, Colorado State University, Fort Collins, CO 80523-1476, USA;4. Civil Engineering Research Institute for Cold Region, Public Works Research Institute, Sapporo, Japan;5. Forest Resources and Environmental Management Faculty, Vietnam Forestry University, Xuan Mai, Chuong My, Hanoi, Vietnam;6. Science Devision, Department of Science, IT, Innovation and the Arts, GPO Box 5078, Brisbane, 4001, Queensland, Australia |
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| Abstract: | Changes in soil texture, bulk density, pH, concentrations and stocks of OC, N, P and K before and after conversion of a 6-year-old Acacia senegal plantation to other land management systems (LMS) were investigated, after three cropping seasons, in the drylands of western Sudan. LMS included pure and intercropped sorghum (PS), roselle (PR) and grasses (PG) with A. senegal at high- and low-tree densities (HD 433 and LD 266 trees ha?1). Significant changes included increase in coarse sand and a decrease in fine sand under pure and intercropped systems at LD; decrease in clay contents in PS and PR; an increase in clay ratio in all pure crops and HD + R; a decrease in aggregated mean concentrations of OC, N and P under all LMS by 42%, 68% and 45%, respectively; increase in soil pH under all LMS; a depletion of aggregated mean stocks of OC, N, P and K in all LMS by 38%, 30%, 52% 13%, respectively. The study established that wholesale tree clearance constitutes a major cause of soil degradation, and tree inputs and cycling of nutrients are of major importance to soil fertility in the study area. |
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