Effects of grazing on the δ 15N values of foliage and soil in a typical steppe ecosystem in Inner Mongolia, China
WU Tian-Xiang, HUANG Jian-Hui
Chin J Plant Ecol . 2010, (2): 160 -169 .  DOI: 10.3773/j.issn.1005-264x.2010.02.007

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