Plantation crops 162 Crops 104 Field crops 67 Agriculture 53 Fruit crops 52 Field Crops 51 Horticultural Crops, (New March 2000) 48 Molecular cloning 48 Plant Breeding and Genetics 46 Cloning 42 Cross-cultural studies 41 Feild crops 41 Horticultural crops 41 Plant breeding 41 Genetic engineering 40 Vegetable crops 40 Plant Production 39 History 37 Novel 37 Plants 37 Crop production 36 Biotechnology 35 Field Crops, (New March 2000) 35 English literature 33 English fiction 32 CROPS 30 Plant Pests, (New March 2000) 30 Genetics 29 Horticulture 28 Literature 28