农牧交错带退耕还草对土壤物理性状的影响
韩永伟, 韩建国, 张蕴薇
Effects on Soil Physical Properties of Forages and Crops in the Agro-pastoral Transitional Zone of North China
HAN Yong-wei, HAN Jian-guo, ZHANG Yun-wei
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2002, (2): 100
-105
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DOI: 10.11733/j.issn.1007-0435.2002.02.005