1. State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science Chinese Academy of Sciences Nanjing China
2. University of Chinese Academy of Sciences Beijing 100049 China
3. Pacific Northwest National Laboratory P.O. Box 999, Richland WA 99352 USA
4. Washington State University, P.O. Box 645910 Pullman WA 99164 USA
5. Department of Chemistry Pennsylvania State University at Mont Alto Mont Alto PA USA
6. Guangdong Haina Institute of Agriculture Huizhou China