栖霞县铁口公社西牟家庄大队,1,197亩耕地,几乎全是山丘梯田。近几年在花生、地瓜地,大搞了堰下丰产沟间玉米,既排除了内涝,又增产了玉米。第三生产队,1974年38亩堰下丰产沟,共收玉米5,800斤,平均每亩152斤,每米长的丰产沟产玉米1.65斤。在冬季或早春,将堰下排水沟挖成2尺宽,1.5尺深的丰产沟,生、熟土分放,填土 Qixia County Tietou commune West Mouji Zhuang brigade, 1,197 acres of arable land, almost all hill terraces. In recent years, peanuts, sweet potatoes, vigorously carried out under weirs rich ditch corn, both ruled out waterlogging, but also increased production of corn. The third production team, in 1974, 38 acres of weeds under the ditch, received a total of 5,800 pounds of corn, an average of 152 pounds per mu, yield per hectare of corn yield 1.65 pounds. In winter or early spring, weir ditch dug into 2 feet wide, 1.5 feet deep Feng ditch, raw and cooked soil release, filling