在我国施于田间的氮素化肥,农作物对其吸收利用率仅为30%,而发达国家竟达40～45%。因此,如何提高我国的氮素化肥利用率,就成为生产上一个亟待解决的问题。根据我的实践,提高化肥利用率的技巧如下: 1.尿素与草酸混施。在每公顷(15亩)土地施用200公斤氮肥、140公斤磷肥、60公斤钾肥的情况 Nitrogen fertilizers applied in the fields in our country have only 30% absorption and utilization rate of crops, while 40 ~ 45% in developed countries. Therefore, how to improve the utilization of nitrogenous fertilizer in our country becomes an urgent problem to be solved in production. According to my practice, to improve fertilizer utilization skills are as follows: 1. Urea mixed with oxalic acid. Application of 200 kilograms of nitrogen fertilizer, 140 kilograms of phosphate fertilizer and 60 kilograms of potash fertilizer per hectare (15 mu) of land