Abayomi, Y. A., Fadayomi, O., Babatola, J. O. and Tian, G. (2001). Evaluation of selected legume cover crops for biomass production, dry season survival and soil fertility improvement in a moist savannah location in Nigeria. African Crop Science Journal 9:615–627.
Amede, T. and Delve, R. (2008). Modelling crop-livestock systems for achieving food security and increasing production efficiencies in the Ethiopian highlands. Experimental Agriculture 44:441–452.
Amede, T. and Taboge, E. (2007). Enhancing farmer innovation through manipulation of soil fertility gradients in enset systems. In Improving human welfare and environmental conservation by empowering farmers to combat soil fertility degradation, 289–297. (Ed. Bationo, A.). African Soils Network, Springer Verlag.
Amede, T., Belachew, T. and Geta, E. (2001). Reversing the degradation of arable land in Ethiopian Highlands. Managing African Soils No. 23. International Institute for Environment and Development, London.
Amede, T., Descheemaeker, K., Peden, D. and van Rooyen, A. (2009). Harnessing benefits from improved livestock water productivity in crop-livestock systems of sub-Saharan Africa: synthesis. The Rangeland Journal 31: 169–178.
Anderson, J.M., and Ingram, J. S. L. (1993). Tropical Soil biology and Fertility: A Handbook of Methods. Wallingford, UK: CAB International.
Bekunda, M. (1999). Farmers' response to soil fertility decline in banana-based cropping systems of Uganda. Managing African Soils No. 4. International Institute for Environment and Development, London.
Berry, L. (2003). Land degradation in Ethiopia: Its extent and impact. Commisioned paper by the GM and WP support. Available from ftp://ftp.fao.org/agl/agll/ladadocs/ETHIOPIA_LD_CASE_STUDIES.doc
Bossio, D., William, C. W., Geheb, K., Van Lynden, G. and Mati, B. (2007). Conserving land and protecting water. In Water for Food, Water for Life: A Comprehensive Assessment of Water Management in Agriculture, 551–583 (Ed. Molden, D.) London: Earthscan.
Buerkert, A., Bationo, A. and Dossa, K. (2000). Mechanisms of residue mulch-induced cereal growth increases in West Africa. Soil Science Society of America. Journal 64:346–358.
Elias, S., Morse, S. and Belshaw, D. G. R. (1998). Nitrogen and phosphorus balances of Kindo Koisha farms in Southern Ethiopia. Agriculture, Ecosystems and Environment 71:93–113.
Fatondji, D., Martius, C., Bielders, C. L., Vlek, P. L. G, Bationo, A. and Gerard, B. (2007). Effect of planting technique and amendment type on pearl millet yield, nutrient uptake and water use on degraded land in Niger. In Improving Human Welfare and Environmental Conservation by Empowering Farmers to Combat Soil Fertility Degradation, 179–193 (Ed. Bationo, A.). African Soils Network, Springer Verlag.
FAO (1998). Crop evapotranspiration – guidelines for computing crop water requirements. FAO, Rome.
FAO (2005). Local climate estimator (New LockClim 1.06). FAO, Rome.
Hassen, A. (1996). Improved traditional planting pits in the Tahoua department, Niger. An example of rapid adoption by farmers. In Sustaining the soil. Indigenous soil and Water Conservation in Africa, 56–61 (Eds Reij, C., Scoones, I. and Toulmin, C.). London: Earthscan.
Jandel Scientific Software (1994). Sigma Stat Statistical Software for Windows. Jandel, San Rafael, CA.
Rockstrom, J. and de Rouw, A. (1997). Water, nutrients and slope position in on-farm pearl millet cultivation in the Sahel. Plant and Soil 195: 311–327.
Roose, E. and Barthès, B. (2001). Organic matter management for soil conservation and productivity restoration in Africa: a contribution from Francophone research. Nutrient Cycling in Agroecosystems 61:1–2.
Roose, E., Kabore, V. and Guenat, C. (1999). Zai practice: a West African traditional rehabilitation system for semiarid degraded lands, a case study in Burkina Faso. Arid Soil Research and Rehabilitation 13: 343–355.
Smaling, E. M. A., Stoorvogel, J. J. and Windmeijer, P. N. (1993). Calculating soil nutrient balances in Africa at different scales II. District scale. Fertility Research 35: 237–250.
Soil Conservation Research Program (SCRP) (1996). Data Base Report (1982–1993), Series II: Gununo Research Unit. University of Berne, Berne.
Stoorvogel, J. J. and Smaling, E. M. A. (1990). Assessment of soil nutrient depletion in sub-Saharan Africa 1983–2000. Report 28. The Winand Staring Centre for Integrated Land, Soil and Water Research (SC-DLO), Wageningen.
Vanlauwe, B., Tittonell, P. and Mukalama, J. (2007). Within soil fertility gradients affect response of maize to fertilizer application in western Kenya. Nutrient Cycling in Agroecosystems 76:2–3.
Vanlauwe, B., Aihou, K., Houngnandan, P., Diels, J., Sanginga, N. and Merckx, R. (2001). Nitrogen management in ‘adequate’ input maize-based agriculture in the derived savanna benchmark zone of Benin Republic. Plant and Soil 228:61–71.