Nitrogen fixing trees Trees 3 Biochemistry and Physiology of Microorganisms, (New March 2000) 2 Nitrogen 2 Nitrogen fixation 2 Nitrogen fixing bacteria 2 Plants 2 Soil Biology 2 Woody plants 2 Agroforestry 1 Agroforestry and Multipurpose Trees: Community, Farm and Social Forestry 1 Asia 1 Azolla 1 Cover crops 1 Cropping systems 1 Crops 1 Denitrification 1 Fabaceae 1 Ferns 1 Fertilizers and other Amendments 1 Field Crops, (New March 2000) 1 Fodder legumes 1 Forage and Fodder Crops, (New March 2000) 1 Forests and Forest Trees (Biology and Ecology) 1 Genetics and Molecular Biology of Microorganisms, (New March 2000) 1 Genome analysis 1 Genomes 1 Green manures 1 Horticultural Crops, (New March 2000) 1 India 1