Motion picture producers and directors 59 Agronomy 49 History 48 Motion pictures 47 Crop Produce 34 Research 28 Plant Biotechnology 27 Food Composition and Quality 26 Motion pictures producers and directors 26 Plant Breeding and Genetics 26 Biotechnology 23 Plant Pathology 23 Social sciences 21 Theatrical producers and directors 21 Agricultural Economics 19 History and criticism 19 Plant Production 19 Horticultural Crops, (New March 2000) 18 Meat Producing Animals 18 Plant diseases 18 Plant Pests, (New March 2000) 17 Horticulture 16 Methodology 16 Plant pests 16 Theater 16 Viral, Bacterial and Fungal Diseases of Plants, (New March 2000) 16 Plant Physiology and Biochemistry 15 Commerce 14 Motion picture producers and directors-Biography 14 Produce trade 14