怎样使用复合肥复合肥一直受到广大农民的欢迎，但有时因施用不当，不能收到应有的效果。使用中应注意以下几点：一、合理选择不同的作物，必须选用适宜的复合肥料，才能充分发挥肥效。一般稻、麦、玉米等禾谷类作物需氮较多，可选用氮磷复合肥；豆科作物由于具有固定空气... How to use compound fertilizer Compound fertilizer has always been welcomed by the majority of farmers, but sometimes due to improper application, can not receive the desired results. Should pay attention to the following points: First, a reasonable choice of different crops, must choose the appropriate compound fertilizer, in order to give full play to fertilizer. General rice, wheat, corn and other cereals crops need more nitrogen, nitrogen and phosphorus fertilizer can be used; legumes due to a fixed air ...