Soil organic carbon, carbohydrates, amino sugars, and potentially mineralizable nitrogen under different land-use systems in oxisols of the Brazilian cerrados
Adapting participatory research methods for developing integrated crop management for cassava-based systems, Northeast Brazil
Aggregation studied by laser diffraction in relation to plowing, soil organic matter, and lime in the Brazilian cerrados
Farmers` independent experimentation with green manure and/or cover crops: a component of participatory research for improving Ugandan farming systems
Designing sustainable, commercial, farmer seed production systems in Africa: case studies from Uganda