Nitrogen fixation in tropical cropping systems

Tropical environments - climates, soils and cropping systems nitrogen fixing organisms in the tropics nitrogen fixation process and its role in the tropics tropical crops and cropping systems - cereal crops and grasses, wetland rice, grain legumes, legumes as animal fodder, plantation crops, agroforestry optimizing contributions from nitrogen fixation - mixed farming systems, environmental constraints, past approaches, realizing potential benefits.