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dian dong yuan yi pen guan ji zuo ye yun xing de kao cha
Author(s): 
Pages: 40-41
Year: Issue:  1
Journal: Water Saving Irrigation

Keyword:  大型喷灌机作业运行电控系统基本情况黑龙江垦区严重影响小麦冬春季降水家庭农场土壤蒸发;
Abstract: <正> 一、基本情况黑龙江垦区是我国商品粮的重点生产基地之一。现有耕地面积290O多万亩,小麦和大豆的播种面积为2600多万亩,占90%左右。这些作物受自然影响较大,尤其是垦区冬春季降水量少,只占全年降水量的30%左右,且春风大,土壤蒸发快。十年中约有七、八年春旱,严重影响小麦发芽生长。仅旱灾
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