化肥用量的计算不同化肥所含纯氮、纯磷、纯钾的量是不同的,一般包装上都写有各种有效成分的含量。给农作物施用化肥时,首先要根据农作物的需要确定施用纯氮、纯磷和纯钾的数量,这就要根据化肥的有效成分含量计算出实际用量。计算方法是:所需化肥重量等于农作物所 The calculation of fertilizer consumption Different fertilizers contain pure nitrogen, pure phosphorus, pure potassium is different, the general packaging are written with a variety of active ingredients. When applying chemical fertilizers to crops, we must first determine the amount of pure nitrogen, pure phosphorus and pure potassium to be used according to the needs of the crops, which is calculated based on the effective content of chemical fertilizers. The calculation is: the required weight of fertilizer equal to the crop