Spatial variability and distribution of soil available micro-elements of Mountain-and-Plain combing zone in Beijing
王淑英,于同泉,王建立,杨 柳,杨 凯,路 苹
Scientia Agricultura Sinica . 2008, (1): 129 -137 .  DOI: 10.3864/j.issn.0578-1752.2008.01.017