Temporal and spatial variations of soil organic and total nitrogen in the Songnen Plain maize belt
ZHANG Chun-hua, WANG Zong-ming, REN Chun-ying, ZHANG Bai, SONG Kai-shan, LIU Dian-wei
GEOGRAPHICAL RESEARCH ›› 2011, Vol. 30 ›› Issue (2) : 256-268.
Temporal and spatial variations of soil organic and total nitrogen in the Songnen Plain maize belt
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