Chen Fang, Liu Dongbi, Xiong Guiyun, Jiang Lina, Guo Xiaomin, Guo Xi. A COMPARISON ON SOIL NUTRIENT CHARACTERISTICS AND ITS SPATIAL VARIABILITY OF TWO PADDY SOILS IN MIDDLE SUB-TROPICAL[J]. Acta Pedologica Sinica,2006,43(4):688-692.