Here are entered general works on harvesting machines and works on machines for cutting grain. --subdivision Harvesting--Machinery under individual crops, e.g. Corn--Harvesting--Machinery
Here are entered general works on the processing of agricultural products. Works on a specific aspect or method of processing are entered under the heading for the specific process. Works on the processing of food in general and on the marketing of processed food products are entered under Food industry and trade. Works on the processing of specific kinds of food products are entered under the heading for the specific product with the subdivision Processing or under the heading for the industry. --subdivision Processing under individual and types of animals and plants, e.g. Cattle--Processing; Corn--Processing; and subdivision Postharvest technology under individual and types of crops, e.g. Corn--Postharvest technology
--subdivision Control under individual weeds and groups of weeds, e.g. Prickly pears--Control; Aquatic weeds--Control; and subdivision Weed control under individual crops and groups of crops, e.g. Corn--Weed control
