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锦州地区年平均降水量是540—630毫米。春季降水量仅占全年降水量的11—14％,有的年份甚至低到8％。同期蒸发量,往往比同期降水量高七、八倍甚至十三倍。因此春旱,对旱田作物播种保苗、稳产增产威胁很大。解放以来,全区广大贫下中农创造了多种耕作保墒经验。这些经验,就其对耕层影响,可以概括为两种类型:一类是造成比较紧密的耕层,如秋收后免耕,早春压上茬。这类耕法可提高播种层土壤含水量,有一定的防旱保苗效果,但后期生育平常,产量不高。然而为防旱保苗,过去曾广泛应用。一类是创造比较疏
The average annual precipitation in Jinzhou is 540-630 mm. Spring precipitation only accounts for 11-14% of the annual rainfall, and some even as low as 8%. Over the same period of evaporation, precipitation is often higher than the same period seven, eight times or even 13 times. Therefore, the spring drought, crop seedlings on the dry field, crop production and threatened a great threat. Since liberation, the vast majority of poor and middle peasants in the region have created many experiences of farming and preserving soil moisture. These experiences, in terms of their effect on topsoil, can be summed up in two types: one is the tillage that results in relatively close compaction, such as no tillage in autumn and pressure on stubble in early spring. This type of tillage can increase the sowing layer of soil moisture content, have a certain effect of seedlings drought prevention, but the latter part of normal fertility, yield is not high. However, to prevent drought seedlings, the past has been widely used. One is to create more sparse