河北省蔚县代王城公社城墙碾大队从1975年开始进行小面积顶凌播种大麻(白麻)试验,获得亩产白麻205斤的好收成,比一般麻田增产40%,韧力、弹力和抗力都达到国家要求的标准。1976年扩大种植56亩,亩产240斤,1977年种植150亩,亩产250多斤。从三年种植实践来看,播种时间以清明节前2—3天为宜,播种深度1.5寸左右,出苗率可达95%。播种前施足底肥,把地翻好整细,刮埂作畦后播种。由于顶凌播麻出苗时天气 Weili County, Hebei Province on behalf of Wangcheng commune wall grind brigade from the beginning of small top Lingling sown cannabis (white hemp) test to obtain a yield of 205 pounds per mu yield better than the general Ma Tian 40% yield, toughness, elasticity and Resistance has reached the standards required by the state. In 1976, it expanded 56 mu of land and 240 mu of mu produce. In 1977, it planted 150 mu of mu produce 250 kilos. From three years of planting practice, sowing time 2-3 days before Ching Ming Festival is appropriate, sowing depth of about 1.5 inches, the emergence rate of up to 95%. Apply enough plantation fertilizer before sowing, turn the land fine and fine, scraping for sowing after sowing. Due to the top Ling broadcast sowing when the weather