Soil Phosphorus Balance and Changes of Olsen-P of Black Soil under Long-term Conventional Fertilization
ZHANG Li, REN Yi, ZHAN Xiao-ying, ZHANG Shu-xiang
Journal of Nuclear Agricultural Sciences . 2014, (9): 1685 -1692 .  DOI: 10.11869/j.issn.100-8551.2014.09.1685