仪征市土壤养分时空变异特征及合理取样数量研究
孙永健, 周蓉蓉, 王长松, 孙园园
Spatial-temporal Variation of Soil Nutrient and Rational Sampling Quantity in the Past 20 Years
SUN Yong-jian, ZHOU Rong-rong, WANG Chang-song, SUN Yuan-yuan
石河子大学学报 . 2008, (6): 686 -690 .