Crops 537 Field crops 267 Congresses 240 Food crops 187 Agriculture 172 Tropical crops 138 Crops and climate 120 meer ... Diseases and pests 85 Genetic engineering 80 Crop yields 78 Crop improvement 77 Germplasm resources 76 Nutrition 74 Physiology 74 Postharvest technology 73 Cropping systems 72 Crops and soils 72 Genetics 69 Research 68 Horticultural crops 66 Plants 64 Periodicals 62 Germplasm resources, Plant 55 Fertilizers 53 Root crops 53 Maps 48 Effect of stress on 46 Plant breeding 45 Tree crops 43 Climatic changes 42 minder ...