Genetics 71 Plant Breeding and Genetics 36 Mathematical models 25 Breeding Genetics and Biostatistics 23 General management 21 Animal Nutrition (General) 18 Plant breeding 18 Biotechnology 17 Biotechnology (General), (Revised June 2002) 17 Plant Production 15 Plant diseases 15 Viral, Bacterial and Fungal Diseases of Plants, (New March 2000) 15 Crop Produce 14 Horticultural Crops, (New March 2000) 14 Animal Genetics and Breeding, (New March 2000) 13 Molecular biology 13 Plant Pests, (New March 2000) 13 Plant Physiology and Biochemistry 13 Genetic Engineering, Gene Transfer and Transgenics, (New June 2002) 12 Linear models (Statistics) 12 Plant pests 12 Taxonomy 12 Keynesianism-- Economics 11 Food Composition and Quality 10 Plants 10 Agricultural Economics 9 Biochemistry 9 Crop production 9 Economics 9 Field Crops, (New March 2000) 9