大豆是这里的拳头产品，历年种植面积占耕地面积的５０％左右。三江平原土壤质地黏朽，通透性差，影响大豆产量的进一步提高。研究应用机械深松改造土壤结构，采取窄行使大豆个体均匀分布，达到合理密植是大豆高产的关键。我们在２００２年示范推广大豆机械深窄密栽培法，获得 Soybean is the fist product here, over the years acreage of cultivated area accounted for about 50% of the area. The soil texture in the Sanjiang Plain is decayed and has poor permeability, affecting the further increase of soybean yield. It is the key to high yield that the application of mechanical deep-loosening to rebuild soil structure and adopting uniform distribution of individual plants in narrowing to achieve reasonable density planting. We demonstrated in 2002 the promotion of deep space cultivation of soybean machinery, obtained