为了探讨大豆中耕深松的增产效果,1980年我们进行了如下试验:试验地为棕黄土,比较肥沃,地力均匀,土层厚度1米以上.大豆品种是“开育八号”.1979年秋季深翻,翌年早春亩施农肥约7,000斤,撒施地表,机耙入土后起垄.试验地面积3亩,每处理各占一半,大区试验,一次重复,南北垄向.4月29日上午 In order to explore the yield-increasing effect of deep plowing cultivation of soybean, we carried out the following experiments in 1980: The trial site is brown loess, which is relatively fertile and has uniform soil fertility with a soil thickness of over 1 meter. Deep plowing, the following year Mushu fertilizer about 7,000 pounds in the early spring, sprinkle the surface, harrow into the soil after Ridge .Tested area of ​​3 acres, each dealing with each half, a large area test, a repeat, North and South ridge.July 29 morning