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泾川县地处黄土高原沟壑区,雨量较多,无霜期长,日照充足,适宜种植绿肥作物,当地群众历来就有种苜蓿、豆类实行轮作倒茬和复种黑豆、芸芥培肥地力的习惯。七十年代后期全县绿肥作物面积逐步扩大,1977年种植25328亩,1978年52395亩,1979年74892亩,加上苜蓿,每年绿肥面积约占总耕地面积的15%。种植绿肥投资少、见效快、收益大,已成为该县改良土壤,提高产量的重要措施。
Jingchuan County is located in the gully area of the Loess Plateau, rainfall, frost-free period, adequate sunshine, suitable for planting green manure crops, the local people have always been a kind of alfalfa, beans crop rotation and cropping black beans, eruca soil fertility habits. In the late seventies, the county’s green manure crop area gradually expanded. In 1977, 25,328 mu of land was planted, 52,395 mu of land in 1978 and 74,892 mu of land in 1979. With the addition of alfalfa, the annual green manure area accounted for about 15% of the total cultivated land area. Planting green manure less investment, quick, big gains, has become the county soil improvement, an important measure to increase production.