Demand-Driven Technologies for Sustainable Maize ... - IITA

154inoculation and nitrogen fertilization in the Nigerian savanna. Journal ofFood and Agriculture 2: 70–74.Omay, A.B., C.W. Rice, L.D. Maddux and W.B. Gordon, 1997. Changes insoil microbial and chemical properties under long-term crop rotation andfertilization. Soil Sci. Soc. Am. J. 61(6): 1672–1678.Peoples, M.B., D.F. Herridge, and J.K. Ladha, 1995. Biological nitrogen fi xation:an effi cient source of nitrogen for sustainable agricultural production?Plant and Soil 174: 3–28.Reeves, D.W. and C.W. Wood, 1994. A sustainable winter-legume conservationtillage system for maize: Effects on soil quality. Pp 1011-1061. In: H.E.Jensen et al. (eds.) Proc. Int. Soil Tillage Res. Org. (ISTRO), 13 th Aalborg,Denmark, 24–29 July 1994.Rhoades, J.D., 1986. Cation-exchange capacity. Pp 149–158 In : A.L. Pageet al. (ed.) Methods of soil analysis. Part 2. 2 nd ed. Agron. Monograph 9.American Society of Agronomy, Madison, Wisconsin, USA.Sanginga, N., K.E. Dashiell, J.A. Okogun, and G. Thottappilly, 1997. Nitrogenfi xation and N contribution by promiscuous nodulating soybeans in thesouthern Guinea savanna of Nigeria. Plant and Soil 195: 257–266.Sanginga, N., J.A. Okogun, B. Vanlauwe, and K.E. Dashiell. 2002. Thecontribution of nitrogen by promiscuous soybeans to maize basedcropping in the moist savanna of Nigeria. Plant and Soil 251: 1–9.Sanginga, N., 2003. Role of biological nitrogen fi xation in legume-basedcropping systems; a case study of West Africa farming systems. Plant andSoil 252: 25–39.SAS (Statistical Analysis System Institute Inc.). 1989. SAS/STAT User’s Guide.Version 4 th edn. Vol. 1, Cary, North Carolina, USA.Thomas, G., R. Wells, and L. Murdock, 1981. Fertilization and liming. Pp 43–54 In J.R. Phillips (ed.) No-tillage research: Research reports and reviews.University of Kentucky, USA.Weber, G.K., P.S. Chindo, K.A. Elemo, and S. Oikeh, 1995. Nematodes asproduction constraints in intensifying cereal-based cropping systems of theNorthern Guinea savanna. Resource and Crop Management ResearchMonogragh No. 17. IITA, Ibadan, Nigeria.Wuddivira, H.N., J.O. Ogunwole, and K.B. Adeoye, 2000. Spatial variabilityof soil physical properties of an alfi sol in Samaru, Nigeria. J. Agric. Environ.1(2):173–182.Xu, R.K., D.R. Coventry, A. Farhoodi, and J.E. Schultz, 2002. Soil acidifi cationas infl uenced by crop rotations, stubble management and application ofnitrogenous fertilizer, Tarlee, South Australia. Austr. J. Soil Research 40(3):483–496.