水分是黄土高原半干旱区林草植被建设的主要限制因子。
Water is the primary limiting factor for forest and grass vegetation construction in semi-acid soils of the Loess Plateau area.
结果表明：（1）黄土高原半干旱区不同树种林地及荒坡土壤含水量很低，接近于凋萎湿度。
The results were as the following:(1) In semi-arid region of the Loess Plateau, the soil moisture contents of forestland and wasteland were low, near to the wilting humidity.
山西省地处黄土高原东部，属我国北方典型的半干旱区。
Shanxi Province, at the east of the Loess Plateau, is located in the typical semi-arid region in northern China.
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