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作物生产是在耕地上利用日光作为能源,利用大气中的二氧化碳及土壤中的水分、氮素和矿质元素为原料,靠作物的生命活动制造有机物质的过程。作物产量分生物学产量和经济产量。生物学产量等于作物收获时的总干重(实际测定时往往未把根干重计算在内)。经济产量是指人们收获目的物(如禾谷籽粒、棉麻纤维、烟叶等)的总干重。经济产量=生物学产
Crop production is the process of using sunlight as a source of energy on cultivated land, making use of carbon dioxide in the atmosphere and water, nitrogen and mineral elements in the soil as raw materials to make organic matter through the life activities of crops. Crop yield is divided into biological yield and economic output. The biological yield is equal to the total dry weight at the time the crop is harvested (root dry weight is often not included in actual measurements). Economic yield refers to the total dry weight of the people (such as cereal grain, cotton fiber, tobacco leaves, etc.) harvested. Economic output = biological production