Volume 76(4), page 349: Lines 1-8 in the Author Information box should read as follows: “Li Xiao is a doctoral student in the College of Natural Resources and Environment, Northwest A&F University, and China University of Mining and Technology in Beijing, China. Yimei Huang (corresponding author) is a professor of eco-environmental engineering in the Key Laboratory of Plant Nutrition and Agri-environment in Northwest China, College of Natural Resources and Environment, Northwest A&F University, Yangling, China.”
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