| 0. agriculture (1505) |  |
| Acid rain (60) | |
| Agribusiness (65) | |
| Agricultural engineering (3) | |
| Agricultural extension (4) | |
| Agricultural marketing (1) | |
| Agricultural waste (23) | |
| Agriculture sector (16) | |
| Agronomy (288) | |
| Animal breeding (68) | |
| Animal husbandry (12) | |
| Animal materials (419) | |
| Animal nutrition (107) | |
| Apiculture (2797) | |
| Artificial insemination (19) | |
| Artificial selection (13) | |
| Cereals (5186) | |
| Climate-based agriculture (14) | |
| Crop (2584) | |
| Dairy (2680) | |
| Farm equipment (59) | |
| Farming (434) | |
| Forestry (7485) | |
| Fruits (7387) | |
| Gardening (1132) | |
| Germination (51) | |
| Gmo (370) | |
| Grains (2546) | |
| Grazing (183) | |
| Greenhouse (1722) | |
| Horticulture (78) | |
| Hydroponics (97) | |
| Intercropping (4) | |
| Irrigation (474) | |
| Livestock (7981) | |
| Monoculture (43) | |
| Orchardry (84) | |
| Organic agriculture (219) | |
| Permaculture (6) | |
| Pesticides (2096) | |
| Postharvest (47) | |
| Precision farming (5) | |
| Rural community development (16) | |
| Small farm (57) | |
| Sustainable agriculture (45) | |
| Tobacco (1518) | |
| Tomato (26) | |
| Tree (9885) | |
| Urban agriculture (57) | |
| Vegetables (7101) | |