Profile distribution of soil available phosphorus and available potassium concentrations and crop grain yields in long-term fertilization experiment
HU Cheng, SONG Jiayong, LI Jing, LIU Chunqing, TAO Xiao’e, CHEN Yunfeng, QIAO Yan, LI Shuanglai, LIU Donghai
Ecology and Environment . 2012, (4): 673 -676 .  DOI: 10.16258/j.cnki.1674-5906(2012)04-0673-04

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