目前,世界一些国家的果园已改清耕休闲为生草栽培,草的种类多为豆科三叶草。朝鲜自1965年开始试种。例如,黄海北道黄州果树农场已在3,000亩果园里种植三叶草,占果园面积五分之一,为朝鲜苹果园推行生草栽培积累了经验,繁殖了种子。 At present, the orchards of some countries in the world have changed their cultivation to leisure and grass cultivation. The species of grass is mostly legume clover. North Korea since 1965 trial planting. For example, the Yellow Tree Farm in Huanghai North Road has planted clover in 3,000 acres of orchards, accounting for one fifth of the area of ​​the orchard. It has accumulated experience in promoting grass planting in North Korea’s apple orchard and breeding seeds.