Horticulture Agriculture 18 Floriculture 17 floriculture 14 Agronomy 10 Vegetables 9 edible tubers 9 Entomology 7 Soil science 6 Botany 5 Fruits 4 Garden crops 4 Olericulture 4 Plant physiology 4 Plantation Crops and Spices 4 Biotechnology 3 Crops 3 Gardening 3 Horticultural Crops, (New March 2000) 3 Medicinal plants 3 Plant Production 3 Plant Propagation 3 Plant pathology 3 Soil Science 3 fruits 3 Agroforestry 2 Aromatic plants 2 Biochemistry 2 Compost 2 Crop Produce 2