“三种三收”亩产超吨粮杨善公社付家李召大队农科队,在改革耕作制度,连续九年试验“三种三收”的基础上,1975年四亩小麦、玉米、玉米三种三收田,亩产达到2072斤,比全大队一年两作田平均亩产1530斤,增产556斤。这四亩丰产田,畦宽2米(包括畦埂1.5尺),小麦5寸耧播种12行,品种“高三七”,单产1021斤。下茬作物的头茬玉米于麦收前25天(5月17日)在畦埂上套种两行 On the basis of reforming the tillage system and experimenting with “three kinds of three kinds of crops” for nine consecutive years, in 1975, four acres of wheat, corn, Three three kinds of corn harvest fields, per mu to 2072 pounds, more than the entire brigade two fields a year average yield of 1530 pounds per mu, an increase of 556 pounds. This four acres of high yielding farmland, 畦 wide 2 meters (including 畦 埂 1.5 feet), wheat 5 inch 耧 sowing 12 lines, varieties “high 37”, yield 1021 pounds. Crops under the head of the first crop of corn in the first 25 days before the wheat harvest (May 17) in two sets of intercropping