Funding acquisition, Y.Z. and Q.L.; methodology and writing—original draft, Q.L. and F.G.; data collection: Q.L., F.G., T.X., Y.T., J.L. and L.W.; writing—review and editing, Q.L., Q.Z. and L.X. All authors have read and agreed to the published version of the manuscript. This research was funded by the National Natural Science Foundation of China (No. 41271534); China Scholarship Council (CN) (No. 201906770044); and Arable Land Quality Grade Survey and Evaluation Project in Hubei, launched by the Ministry of Agriculture and Rural Affairs of China.
