Lijie Zhang¹, Xia Lu¹, Xujun Liang¹, Quanying Wang¹, Xiangping Yin¹, Eric M Pierce¹ and Baohua Gu^1,2, (1)Oak Ridge National Laboratory, Environmental Sciences Division, Oak Ridge, TN, United States, (2)University of Tennessee, Department of Biosystems Engineering and Soil Science, Knoxville, TN, United States