Agriculture 271 Plantation crops 162 Crop improvement 147 Crop production 114 Agronomy 107 Crops 104 Horticulture 88 Plant Propagation 76 Field crops 67 Plant breeding 67 Plant Breeding and Genetics 63 Plant diseases 60 Plant pathology 60 Biotechnology 59 Fruit crops 52 Field Crops 51 Horticultural Crops, (New March 2000) 48 Plant Production 44 Plant Biotechnology 42 Feild crops 41 Horticultural crops 41 Vegetable crops 40 Plants 39 Soil Science and Agricultural Chemistry 39 Plant protection 38 Soil science 38 Vegetables 38 Field Crops, (New March 2000) 35 Crop Produce 34 Plant Pests, (New March 2000) 33