You can browse the shelves at the following call numbers:
S583-S587.73: Agricultural chemistry. Agricultural chemicals.
S589.7: Agricultural ecology
S589.75-S589.76: Agriculture and the environment
S604.8-S621.5: Melioration. Improvement, reclamation, fertilization, irrigation, etc., of lands
S631-S667: Fertilizers and improvement of the soil
TP368-TP456: Chemical technology. Food processing and manufacture.
TX341-TX641: Nutrition. Foods and food supply.