1. Acton, D.F., 1992. Grassland soils. In: Coupland, R.T. (Ed.), Ecosystems of the World 8A. Natural Grasslands Introduction and Western Hemisphere. Elsevier, Amsterdam, pp. 25–54
2. Alway, F.J., 1909. Changes in the composition of the loess soils of Nebraska caused by cultivation. Nebr. Agric. Exp. Sta. Bull. 111
3. Anderson, D.W., 1987. Pedogenesis in the grassland and adjacent forests of the great plains. In: Stewart, B.A. (Ed.), Advances in Soil Science, Vol. 7, Springer, New York, NY, pp. 53–93
4. Anderson, D.W., 1995. Decomposition of organic matter and carbon emissions from soils. In: Lal et al., R. (Eds.), Soils and Global Change. Advances in Soil Science. Lewis Publishers, Boca Raton, FL, pp. 165–176
5. Organo-mineral complexes and their study by radiocarbon dating;Anderson;Soil Sci. Soc. Am. J.,1984