Effects of Long-term Fertilization on Relationship among Phosphorus Forms in Loess Hilly-gully Region
YANG Yan-ju, WANG Gai-lan, ZHANG Hai-peng, ZHAO Xu
ACTA AGRICULTURAE BOREALI-SINICA . 2012, (6): 191 -195 .  DOI: 10.3969/j.issn.1000-7091.2012.06.037