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我县位于延安地区南部,人均耕地4亩以上,小麦面积12万亩,绝大部分一年一熟.作物施肥主要靠农家肥,小麦收获到播种时间短(6～9月),积肥少,施肥面积只有三分之一左右,每亩3,000多斤.1964年前后曾试验、推广麦田套种草木栖压青,以及绿、黑(黄)豆压青作麦田底肥,在生产上发挥了一定作用.但旱象严重特别是伏早,造成缺苗、产草量低.1970年以后,引种冬豌豆(越不了
My county is located in the southern part of Yan’an, arable land per capita more than 4 acres, wheat area of 120000 acres, the vast majority of a year.Mented mainly by manure fertilizer, wheat harvest to sowing time is short (June to September), less fertilizer, Only about one third of the area of fertilization, more than 3,000 kilos per acre .1964 years before and after the experiment, the promotion of wheat intercropping green wheat field intercropping green, and green, black (yellow) bean pressure green as the base fertilizer, wheat has played a role in production However, serious drought especially early volts, resulting in lack of seedlings, low production of grass .1970 after the introduction of winter peas (not to mention