辽宁省海城县几年来用马拉农具平播的高粱,大部份发生坐苗现象,因而影响小苗生育缓慢,延长成熟期,并减产。1954年曾调查4个村6个生产合作社平播的高粱,整地日期、深度、土质条件都相似,而结果有坐苗与不坐苗的。例如管饭寺村五星农业生产合作社,用拖拉机翻地,深达4寸,耙和镇压各一次,用马拉农具播种高粱,随后用镇压器镇压一次,小苗 In recent years, Haicheng County, Liaoning Province, with Maolanongju sowing sorghum, most of the occurrence of sit-miao phenomenon, which affects the growth of young seedling is slow, to extend the maturity and cut. In 1954, surveys were conducted on the sorghum planted by 6 production cooperatives in 4 villages. The preparation date, depth and soil conditions were all similar. The result was that there were seedlings and no seedlings. For example, Guanmei Temple five-star agricultural cooperatives, turning tractors, up to 4 inches deep, raking and repression, with sowing sowing sorghum, and then suppress with a crusher, seedlings