1. Corn and soybean cropping effects on soil losses and C factors;Alberts;Soil Sci. Soc. Am. J.,1985
2. Basic, F., Salinovic, I., Basic, I., Kellkayyelah, A., Butorac, A., 1991. Possibilities of soil conservation by means of different tillage methods on Acric Ferralsol of the Ethiopian Plateau. In: Proceedings of the 12th Conference of ISTRO on Soil Tillage and Agricultural Sustainability, Ibadan, Nigeria, pp. 58–60.
3. Tillage studies with a corn–soybean rotation: hydrology and sediment loss;Edwards;Soil Sci. Soc. Am. J.,1993
4. Untersuchungen über die chemische bodenanalyse als grundlage für die beurteilung des nährstoffzustandes der böden. II. Chemische extraktionsmethoden zur phosphor und kalium-bestimmung;Egner;Kungl. Lantbrukshögskolans Annaler,1960
5. FAO, 1990. FAO–UNESCO soil map of the world. Revised legend. World soil resources. Report No. 60. FAO/UNESCO/ISRIC, Rome.