Origin Language and languages 8 Human beings 5 Life 5 Biological Resources (Plant) 4 History 4 Plant Breeding and Genetics 4 Plant Production 4 Viral, Bacterial and Fungal Diseases of Plants, (New March 2000) 4 Crop production 3 Field Crops, (New March 2000) 3 Human evolution 3 Indo-Aryans 3 Plant Ecology 3 Plant Pests, (New March 2000) 3 Plant breeding 3 Plant disease control 3 Plant ecology 3 Plant pests 3 Taxonomy 3 Taxonomy and Evolution 3 Anthropological linguistics 2 Biotechnology 2 Cosmology 2 Crop Produce 2 Cropping systems 2 Cultivars 2 Development 2 Evolution(Biology) 2 Food Economics, (New March 2000) 2