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中文
The effect of different extents on variation of nitrogen density of paddy soils in China
ZHANG Liming, LIN Jinshi, SHI Xuezheng, YU dongsheng
Ecology and Environmental Sciences . 2011, (
1
): 1 -6 . DOI: 10.16258/j.cnki.1674-5906(2011)01-0001-06