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在水土流失严重、土壤瘠薄、肥料缺乏、的晋西北黄土高原,采用“丰产沟”种植法,能够做到“蓄水、保土、抗旱、高产”.据连续四年在中阳县的张子山、金罗、城关、暖泉等四个公社二十二个大队多点试验示范,一般增产一倍左右,有的亩产千斤以上.并能种地养地,提高土壤肥力,持续获得高产.二年平均,梯田上增产91.3～94.9%;坡地上增产116%.张子山公社赵家山大队1978年在小面积试验获得增产一倍的基础上、1979年试验示范面积扩大到155.7亩.种植玉米、谷子、高梁和冬小麦,平均亩产947.9斤.丰产沟面积仅占粮田总面积的14.9%、产量占总产量31.1%.由于“丰产沟”的增
In the soil erosion, soil infertility, lack of fertilizers, the northwestern Shanxi Loess Plateau, using “high yield ditch” planting method, can achieve “water storage, soil conservation, drought, high yield.” According to four consecutive years in Zhongyang County, , Jinluo, Chengguan, Warm Springs and other four communes twenty-two brigade more pilot demonstration, generally doubling the output, and some per mu yield more than 1000. And species can be raised to increase soil fertility and continue to obtain high yield. In the two-year average, the yield on the terraced fields increased by 91.3% to 94.9% and that on the slopes increased by 116% .Zhaojiashan Brigade in Zhangzishan commune doubled in small-area test in 1978 and expanded the experimental demonstration area to 155.7 mu in 1979. Planting corn, Millet, sorghum and winter wheat, with an average yield of 947.9 kg per mu. The area of Fengchanggou only accounts for 14.9% of the total grain crop area and the output accounts for 31.1% of the total output.