7Franzluebbers AJ. 2002. Soil organic matter stratification ratio as an indictor of soil quality. Soil & Tillage Research, 66: 95-106.
8Gregorich EG, Beare MH, McKim UF, et al. 2006. Chemical and biological characteristics of physically uncomplexed organic matter. Soil Science Society of America Journal, 70: 975-985.
9Lu JW, Wang HJ, Wang WD, et al. 2007. Vegetation and soil properties in restored wetlands near Lake Taihu, China. Hydrobiologia, 581: 151-159.
10Meyer CK, Baer SG, Whiles MR. 2008. Ecosystem recovery across a chronosequence of restored wetlands in the platter river valley. Ecosystems, 11: 193-208.