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Shear strength tests of the root-soil composite system of alpine grassland vegetation at different stages of degradation and the determination of thresholds in the Yellow River source region
LIU Chang-Yi, HU Xia-Song, DOU Zeng-Ning, LI Xi-Lai, XU Zhi-Wen
Acta Prataculturae Sinica . 2017, (9): 14 -26 .  DOI: 10.11686/cyxb2017005