1. Options for increasing carbon sequestration in West African soils: an exploratory study with special focus on Senegal;Batjes;Land Degrad. Develop.,2001
2. Bremner, J.M., Mulvaney, C.S., 1982. Nitrogen-total. In: Page, A.L., et al. (Eds.), Methods of Soil Analysis. Part 2. Chemical and Microbiological Properties. American Society of Agronomy, Madison, WI, pp. 595–624.
3. Changes in soil carbon inventories following cultivation of previously untilled soils;Davidson;Biochemistry,1993
4. FAO, 1995. Digital soil map of the world and derived soil properties. Land and Water Digital Media Series 1. FAO, Rome.
5. Feller, C., 1993. Organic inputs, soil organic matter and functional soil organic compartment in low-activity clay soils in tropical zones. In: Mulongoy, K., Merckx, R. (Eds.), Soil Organic Matter Dynamics and Sustainability of Tropical Agriculture. Wiley–Sayce Co-Publication, Leuven, pp. 77–88.