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山东昆嵛县萌生农业社在1954年秋种时,将旧耧改成密植耧,在同样条件下,获得每亩增产30斤的成绩。当地旧耧腿距9寸,耧铧播种时与地面成60角度,下种口距地面4寸左右,下种口是圆形。(图一)改耧方法是将9寸耧腿距离改成5寸半。使耧铧与地面角度缩小的方法,是将耧铧卸下来,把插在耧铧中的耧腿尖端,钉上一块曲度与改变后耧铧与地面
In the autumn of 1954, the agricultural cooperatives of Kunlu County in Shandong Province changed the old ones into close planting ones, and under the same conditions, they gained 30 kg of output per acre. The old 耧 9 feet away from the ground, when the crop sowing angle of 60 degrees with the ground, the next kind of mouth about 4 inches from the ground, the next seed is round. (Figure a) change 耧 method is to change the 9-inch 耧 leg distance of 5-inch and a half. The angle between the tile and the ground is reduced. The tile is removed and the tip of the tile inserted in the tile is nailed to a curvature and the post-tile is changed to the ground