锦县双羊公社长山子大队,有耕地6,500亩,现在基本全部实行了机耕系列化作业。几年来,粮食产量逐年提高,去年全队产量一跃过“长江”,平均单产达到820斤,比未机械化前最高单产翻了一翻。这个队从1975年开始试种玉米、高梁平播散施肥大垄清种,连续四年显著增产,去年发展到2,180亩,其中大垄玉米1,480亩,占玉米面积的62％;平均 There are 6,500 mu of cultivated land in Changshanzi Brigade, Shuangyang Commune, Jinxian County. Over the past few years, the grain output has been increasing year by year. Last year the production volume of the entire team jumped over the “Yangtze River” and the average yield per unit reached 820 kilos, double the highest yield before the mechanization. The team began experimenting with maize in 1975 and the sowing and sowing of large ridge cleared sowing fertilizers for the fourth consecutive year. It expanded to 2,180 mu last year, of which 1,480 mu were large ridge maize, accounting for 62% of the area of ​​maize. The average