Effects of Longterm Fertilizer Applicationon Soil Microorganisms and Humus Compositions
Zhang Xiang, Zhu Hongxun, Sun Chunhe
ACTA AGRICULTURAE BOREALI-SINICA . 1998, (2): 87 -92 .  DOI: 10.3321/j.issn:1000-7091.1998.02.016