Titlebook: Managing Organic Matter in Tropical Soils: Scope and Limitations; Proceedings of a Wor C. Martius,H. Tiessen,P. L. G. Vlek Conference proce

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Management of soil organic matter in semiarid Africa for annual cropping systems,). There is an urgent need to improve the management of all types of . input. In this paper; the authors review a wide range of agricultural practices and discuss their advantages, limitations and feasibility. They distinguish ‘traditional systems’ such as traditional fallow, parkland and manuring f

ensemble

Soil management under no-tillage systems in the tropics with special reference to Brazil,-humid tropics. Compared to conventional tillage (tillage operations resulting in < 30% cover of plant residue remaining on the surface), no-tillage combined with crop rotation involving cover crops increases soil organic matter content, whilst improving soil fertility. This was mostly evident at 0–

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Soil organic carbon management for sustainable land use in Sudano-Sahelian West Africa,zone of West Africa are highly unsustainable for crop production intensification. With kaolinite as the main clay type, the cation exchange capacity of the soils in this region, often less than 1 cmol. kg.soil, depends heavily on the organic carbon (Corg) content. However, due to low carbon sequestr

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Soil organic carbon (SOC) management for sustainable productivity of cropping and agro-forestry sysultural systems has resulted in widespread agro-ecosystems with high soil organic carbon and nutrient depletion. This is quite evident in farming systems with reduced fallow period or those that practice continuous cropping without or with little inputs. Long-term experiments indicate that losses of

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Preserving tropical soil organic matter at watershed level. A possible contribution of urban organithod of material flux analysis to a watershed in Boyacd in Colombia. We estimate the order of magnitude of the dry organic matter and carbon fluxes between the rural and urban parts of the region, including estimates on biomass growth, tillage, organic waste, and sewage. These estimates are used to

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Social, economic and policy dimensions of soil organic matter management in sub-Sahara Africa: chaltion and limited external inputs in the form of mineral fertilizers. Deterioration of SOM varies by agro-ecological zones, by soil types and by cropping patterns. It is more intense in East Africa, followed by coastal West Africa and Southern Africa and least intensive in the Sahel and Central Afric

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,Farmer’s view on soil organic matter depletion and its management in Bangladesh,oduct is 30%. Rice is the major food crop while jute, sugarcane and tea are the main cash crops. Other important crops are wheat, tobacco, pulses, vegetables and fruits. Overall productivity in Bangladesh is stagnating or declining. The implication of yield stagnation or declining productivity is se

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,Farmers’ perceptions and management of soil organic matter — a case study from West Africa, organic matter’ (SOM) and its management. The results of a closed questionnaire accompanied by open discussions showed that most farmers are well aware of SOM and its importance for crop yields. In southern Ghana, farmers perceive SOM generally by its colour, while in northern Ghana, it is mostly a

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