PPT
Soil Organic Carbon Budget as Related to Land Use History in the Northwestern Great Plains. Zhengxi Tan *,1,2 , Shuguang Liu 2 , Carol A. Johnston 1 , Thomas R. Loveland 3 Jinxun Liu 4 , Rachel Kurtz 3 , and Larry Tieszen 3 1 South Dakota State University, Brookings, SD 57007