Evaluation of Soil Fertilities of Farmland at County Level Based on GIS and Analysis of Obstacle Factors
FENG Yao-zu;GENG Qing-long;CHEN Shu-huang;GUO Ji-chao;DONG Ju-he;JIA Deng-quan;GAO Yong-jian
. 2011, (12): 2281 -2286 .