Assessment of Soil Productivity in the Southern Guinea Savanna Zone of Nigeria

Agber, P.I., Ajon, A.T., and Ugese, F.D. (2017). Effect of cover management practices on Erosion, Soil properties and maize performance under Natural Rainfall in Makurdi, Benue State, Nigeria. International Journal of Agriculture, Environment and Bioresearch, 2 (4): 113 – 125. Amede, T. (2003). Opportunities and Challenges in Reversing Land degradation: The Regional Experience. In: Amede, T. (ed), Natural resource degradation and environmental concerns in the Amhara National Regional State: Impact on Food Security. Ethiopian Soil Science Society, 3: 173-183. Karlen, D.L. (2005). Soil productivity. In: Encyclopedia of Soils in the Environment. www.sciencedirect.com Delgago, J.A., and Lopez, L.O.E. (2021). Potential use of cover crops for soil and water conservation, nutrient management, and climate change adaptation across the tropics. In: Advances in Agronomy. www.sciencedirect.com Liasu, M.O., Ogundare, A.O., and Ologunde, M.O. (2008). Effect of soil supplementation with fortified Tithonia mulch and directly applied inorganic fertilizer on growth and development of potted okra plants. American-Eurasian J. Sustain. Agric. 2(3): 264-270. Ogunjinmi, O.F., Kolawole G.O., and Oyeyiola, Y.B. (2017). Soil fertility assessment and determination of potential ameliorants for an Alfisol under long-term continuous cultivation in southwestern Nigeria. Journal of Soil Science and Environmental Management, 8(9): 155 – 163. Sanchez, P.A., Leakey, R.R.B. (1997). Land-use transformation in Africa: Three determinants for balancing food security with natural resource utilization. Eur. J. Agron. 7: 15-23. Tanimu, J., Uyovbisere, E.O., Lyocks, S.W.J., and Tanimu, Y. (2013). Effects of cow dung on the growth and development of maize crop. Greener J. Agric. Sci. 3(5): 371-383. USDA (2010). Foreign Agricultural Service, GAIN Report (Global Agriculture Information Network), Nigeria Grain and Feed Annual-Nigeria's Wheat Imports Surge. Vanlauwe, B. Tittonell, P., and Mukalama, J. (2006). Within-farm soil fertility gradient affect response of maize to fertilizer application in western Kenya. Nutrient Cycling Agroecosystem, 76: 171-182. Zingore, S. (2011). Maize productivity and response to fertilizer use as affected by soil fertility variability, manure application and cropping system. Better Crops, 95(1): 4-6.