三江平原是我省大豆生产的重要产区,播种面积占耕地面积的30%左右。全区一般亩产140～200斤,中低产田占耕地面积的95%。为进一步提高大豆单产水平,使低产变中产,为生产提出“投资少,产量高”的农艺方案,采用二次正交回归旋转试验,通过微型电子计算机寻找最佳农艺措施组合方 Sanjiang Plain is an important producing area of ​​soybean production in our province, sown area accounts for about 30% of arable land. The region generally yields 140 ~ 200 jin per mu, middle and low yield fields account for 95% of the cultivated land area. In order to further improve the yield level of soybean, make low-yield and middle-yield, put forward the agronomic scheme of “low investment and high yield” for the production, adopt quadratic orthogonal regression rotation test, find the best agronomic combination method by miniature electronic computer