实践证明,豌豆也有较大的增产潜力。1979年北义厚大队有17亩豌豆丰产田,亩产506斤t四里铺大队第二队共种90亩豌豆;亩产355斤,超过本队冬小麦的亩产。近几年,我县豌豆面积不断扩大,由万亩左右,发展到1979年的35,000亩。豌豆是豆科作物,有根瘤菌,能固定土壤空气中的游离氮素,提高土壤肥力,促进下茬作物增产。起到种地养地的作用。如大 Practice has proved that peas also have a greater yield potential. In 1979 North Yi thick brigade has 17 acres of peas yield field, yield 506 pounds t Sili Liding Brigade second team a total of 90 acres of peas; mu produce 355 pounds, more than the team’s winter wheat per mu. In recent years, the area of ​​peas in our county has continuously expanded from about 10,000 mu to 35,000 mu in 1979. Peas are leguminous crops, rhizobia, can fix the free nitrogen in soil air, improve soil fertility, and promote the next crop yield. Play a role in raising land. Such as large