* 国家重点基础研究专项经费(G1999011810);ACIAR项目(LWR1/96/164)资助
张世熔,黄元仿,李保国,张凤荣,胡克林.河北曲周土壤氮素养分的时空变异特征[J].土壤学报,2003,40(3):475-479. DOI:10.11766/trxb200109200324 Zhang Shi-rong, Huang Yuan-fang, Li Bao-guo, Zhang Feng-rong, Hu Ke-lin. TEMPORAL-SPATIA LVARIABILITY OF SOIL NITROGEN NUTRIENTS IN QUZHOU COUNTY, HEBEI PROVINCE[J]. Acta Pedologica Sinica,2003,40(3):475-479.
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