[1
] College of Natural Resources & Environment, Northwest A&F University, Yangling,
China
[2
] Key Laboratory of Crop Nutrition and Fertilization, Ministry of Agriculture of China,
Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural
Sciences, Beijing, China
[3
] Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi,
China
[4
] Department of Horticulture, The University of Agriculture, Peshawar, Pakistan
[5
] Department of Environmental Science and Technology, University of Maryland, College
Park, MD, USA