农民在播种庄稼时,所施的化肥无所谓深浅,对化肥施用的深浅不清楚其利害关系。根据多年的实践证明,化肥深施要比浅施可提高肥效15%～20%,从而达到提高产量的作用。其产要原因是:深施可以以减少肥分子的流失。有些化肥(比如硝态氮化肥等)较浅地施入土壤后,其中硝酸根离子不能被 Farmers in the sowing of crops, the fertilizer applied indifferent, the depth of the use of chemical fertilizer unclear its stake. According to many years of practice, it has been proved that the application of chemical fertilizers should be 15% ~ 20% higher than that of light fertilizers, so as to increase the yield. The reason for its production is: deep application can reduce the loss of fat molecules. Some fertilizer (such as nitrate fertilizer, etc.) applied to the soil after shallow, in which nitrate ions can not be