山西省右玉县地处黄土高原,自然条件较差,干旱、风、冻灾害较多,加上地广人稀,耕作粗放,水土流失严重。这里过去粮食亩产只有四、五十斤,如何改变这种状况?实践证明,防治水土流失,提高土壤肥力是重要关键。在坡耕地上种植绿肥牧草,实行草田轮作,是防风固沙,保持水土,培肥地力,解决三料(饲料、肥料、燃料),促进山区农业生产的有效措施。 Youyu County, Shanxi Province is located in the Loess Plateau, poor natural conditions, drought, wind and cold more disasters, coupled with extensive sparsely populated, extensive farming, soil erosion is serious. In the past, there were only four to 50 tons of grain per mu in the past. How has this changed? Practice has proved that controlling soil and water loss and improving soil fertility are the key issues. It is an effective measure to prevent wind and sand, maintain soil and water, fertilize soil, and solve three materials (feed, fertilizer and fuel) and promote agricultural production in mountainous areas.