松嫩平原玉米带土壤有机质和全氮的时空变异特征
张春华, 王宗明, 任春颖, 张柏, 宋开山, 刘殿伟
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
地理研究 . 2011, (2): 256 -268 .  DOI: 10.11821/yj2011020006