AGRICOLA The topics covered in this USDA database include: agriculture, agronomy, animal science, biology, biotechnology, botany, breeding, chemistry, conservation, crop management, dairy science, ecology, entomology, farm management, feed science, fertilizers, food and nutrition, forestry, horticulture, hydrology, hydroponics, microbiology, nutrition, pesticides, physiology, plant science, pollution, soil science, water quality, and zoology.