Soil science 20 Biochemistry 13 geochemistry-weathering 13 Metabolism 11 Photosynthesis 11 Agricultural chemistry 7 History - agricultural universities 7 Respiration 7 soil chemistry 7 chemistry-agriculture 5 Agricultural chemistry-dictionary 4 Biomolecules 4 Literature 4 Soil Science- Chemical properties 4 plant crops 4 Civil service 3 Fermentation 3 Kerala 3 Law and legislation 3 metabolism 3 photosynthesis 3 soil science 3 Energenetics 2 Enzymes 2 Literature Sanskrit 2 Philosophy 2 Religion 2 Soil Science Chemical properties 2 Soil chemistry 2 aliphatic compounds 2