Green manures 7 Azolla 6 Green manure 6 Green Manuring 4 Green manuring 4 green manures 4 Field crops-botany 3 Organic farming 3 Plant Nutrition 3 fibre crops 3 forage crops 3 Biofertilizers 2 Cropping systems 2 Fertilizers and other Amendments 2 Field Crops, (New March 2000) 2 Forage and Fodder Crops, (New March 2000) 2 GREEN MANURE 2 GREEN MANURING 2 GREEN MANURING PRACTICES 2 Green Manure 2 Nitrogen 2 Organic manures 2 Plant Cropping Systems 2 Plant Physiology and Biochemistry 2 Plant Production 2 ACCUMULATION OF BIOMASS AND NITROGEN 1 AGROTECHNOLOGY OF GREEN MANURING 1 AZOLLA 1 Acid deposition 1 Agricultural practices- New Mexico 1