Effects of Long-term Fertilization on Distribution and Accumulation of NO3--N in Agricultural Land in Northwestern Shanxi Province
HUANG Xue-fang, CHI Bao-liang, ZHANG Dong-mei, ZHANG Jian, WANG Gailan
ACTA AGRICULTURAE BOREALI-SINICA . 2008, (4): 204 -207 .  DOI: 10.7668/hbnxb.2008.04.046