In order to make scientific and rational use of waste rock and soil in mining areas. guide its classification and discard and reconstruct high quality reclaimed soil. the loess parent material in the Pingshuo opencast mining area is used as a control to analyze the differences in physical and chemical properties of different types of rock and soil layers. and the source control of lan... https://www.ealisboa.com/top-offer-Telemarkskongen-SH-best-find/