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陝北丘陵沟壑区現有的大中型淤地垻,均已发揮了显著的拦蓄作用,很多垠在建成后二、三年即基本淤成,并开始耕种利用。但是由于缺乏垻地利用經驗,在大中型垻地生产方面还存在不少問題。据黄委会一九六四年調查的二十三个大中型垠地統計,垻地利用率(耕种面积占淤地面积的百分率),平均为百分之五十三点五,保收率(实收面积占种植面积的百分
Existing large and medium-sized silt mounds in the hilly and gully areas of northern Shaanxi have all played a significant role in interception. Many of them are basically silted in the next two or three years and are started to be cultivated and utilized. However, due to the lack of effective use of experience, there are still many problems in the production of large and medium-sized buildings. According to the 23 large and medium-sized Yin statistics surveyed by the Yellow RiverProcedure in 1964, the utilization rate of halottes (as a percentage of total land area) is an average of 53.5% (Acreage as a percentage of area planted