1College of Resources and Environmental Sciences, China Agricultural University/Key Laboratory of Arable Land Conservation (North China), Ministry of Agriculture/Key Laboratory of Agricultural Land Quality Monitoring, Ministry of Land and Resources, Beijing, China.
2Key Laboratory of Digital Earth Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing, China.
3School of Earth and Environment, Anhui University of Science and Technology, Huainan, China.
Address for correspondence: Yuanfang Huang, PhD, College of Resources and Environmental Sciences, China Agricultural University/Key Laboratory of Arable Land Conservation (North China), Ministry of Agriculture/Key Laboratory of Agricultural Land Quality Monitoring, Ministry of Land and Resources, Beijing 100193, People’s Republic of China. E-mail: [email protected]
Financial Disclosures/Conflicts of Interest: None reported.
Received November 1, 2016.
Accepted for publication March 19, 2017.