6Hetzler R T, Darmody R G. Coal mine subsidence mitigation: Effects on soil and Crop Yields [A].Robert E D, Barnhisel R I, Darmody R G.Proceeding of 1992 National Symposium on Prime Farmland Reclamation [C]. Urbana : University of Illinois Press, 1992. 129-136.
7Seils D E, Darmody R G,Simmons F W. The effects of coal mine subsidence on soil macroporsity and water flow[A]. Robert E D, Barnhisel R I, Darmody R G.Proceeding of 1992 National Symposium on Prime Farmland Reclamation [C]. Urbana. Universky of Illinois Press, 1992. 137-1466.
8Roosendaal Van D J. Longwall mine subsidence of farmland in Southern Illinois: Near-surface fracturing and associated hydrogeological effects[A]. Robert E D, Barnhisel R I, Darmody R G. Proceeding of 1992 National symposium on Prime Farmland Reolamation [C]. Urbana: University of Ilhnois Press, 1992. 147-158.
9Datta K K , Jong C. Adverse effect of water logging and soil salinity on crop and land productivity in northwest region of Haryana, India[J]. Agricultural Water Management, 2002(57):223-238.
10Chen M. Development and the Environment [D].Berkley : University of California, 2001.
