Effect of the Humic Acid Fertilizer on the Quantity of Microorganism in the Soil
YANG Yun-ma, XUE Shi-chuan, XIA Feng-zhao, JIA Shu-long, MENG Chunxiang
ACTA AGRICULTURAE BOREALI-SINICA . 2007, (S2): 187 -189 .  DOI: 10.7668/hbnxb.2007.S2.045