化肥深施好处昌图县位于辽宁省的北部，全县有耕地３４０万亩，其中玉米面积达２００万亩。是全国重点商品粮基地之一。ｌ９９５年全县推广化肥深施技术５０万亩，施肥深度为６－１０厘米。据调查，平均亩增产粮食２７公斤，亩节省纯氮４．１５公斤，折尿素９公斤，亩增收... Fertilizer deep benefits Changtu County is located in the northern part of Liaoning Province, the county has 340 acres of arable land, of which 200 acres of corn area. Is one of the country’s key commodity grain base. In l995, the government promoted a 50-million-acre cotton plant with a throughput of 6-10 centimeters. According to the survey, an average grain yield of 27 acres of mu, mu saving 4.15 kg of pure nitrogen, folding urea 9 kg, mu income ...