Congresses 4,105 Agriculture 2,518 Diseases 1,738 Periodicals 1,549 Forests and forestry 1,422 Research 1,323 Diseases and pests 1,232 more ... Fisheries 1,057 Soils 981 Dogs 927 Economic aspects 896 Breeding 886 Handbooks, manuals, etc 841 Rice 837 Veterinary medicine 814 Control 809 Cats 729 Horses 670 Fertilizers 664 Livestock 610 Forest management 542 Environmental aspects 534 Fishery management 523 Fishes 479 Aquaculture 476 Plant diseases 461 Crops 444 Management 443 Poultry 443 Pesticides 431 less ...