Effect of the Level of Soil Fertility on Biologic Fixation of Nitrogen Fertilizer
TANG Yu-xia, MENG Chun-xiang, JIA Shu-long, WANG Hui-min, LIU Qiao-ling
ACTA AGRICULTURAE BOREALI-SINICA . 2003, (S1): 136 -138 .  DOI: 10.3321/j.issn:1000-7091.2003.z1.038