Agriculture 241 Pharmacology and Toxicology 203 Plantation crops 162 Crop improvement 147 Drugs 146 Crop production 114 Crops 104 Horticulture 81 Plant Propagation 76 Biotechnology 70 Plant breeding 68 Field crops 67 Plant diseases 60 Medicine 59 Drawing 55 Plant pathology 55 Fruit crops 52 Field Crops 51 History 51 Medicinal plants 51 Plant Breeding and Genetics 51 Horticultural Crops, (New March 2000) 48 Pharmacology 48 Plant Production 44 Plants 44 Agronomy 43 Arts 43 Feild crops 41 Horticultural crops 41 Genetics 40