旱地W型膜盖集雨补灌种植技术
Agricultural Technology & Equipment（2011）
Abstract
<正>山西省位于黄土高原东部,是我国北方典型的半干旱区,全省水资源人均占有量和公顷占有量分别为全国平均水平的17%和13%。旱作耕地占总耕地面积的70%。年均降水量489mm,且降水时空分布不均,70%集中
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