..............page:19-20,60
..............page:6-10,16-18,28-33,39-47
Research progress about the contaminative element such as
cd; cr; hg; pb et al in paddy soil wang kai-yong ; yu shu ; zhai kun ; zhu li-mei; ye yu-sheng (biological and environmental sciences institute of guizhou college; guiyang 550001; china; land and environmental institute of shenyang agricultural college; shenyang 110161; china; agricultural institute of guizhou college; guiyang 550001 ; china)
..............page:43-46