References
- Adetiloye, P.O. 1989. A review of current competition indices and models for formulating component proportions in intercropping. Cassava based cropping systems research II. International Institute of Tropical Agriculture, Ibadan, Nigeria.
- Albera, T., T. Tomado, and L.M. Plant. 2005. Grain yield LER of maize/climbing bean intercropping as affected by inorganic fertilizers and population density in Western Oromia Ethiopia. Asian J. Plant Sci. 4(5):458–465.
- Anonymous. 1985. The reconnaissance soil survey of Nigeria, Kaduna, Nigeria. Federal Department of Agricultural Land Resources, Kaduna, Nigeria.
- Anonymous. 1998. Annual report for 1998. International Institute of Tropical Agriculture, Ibadan, Nigeria.
- Anonymous. 2009. Genstat 12th ed. VSH International Bioscience Software and Consultancy, Hemel Hemstead, U.K.
- Anosike, C.A., O. Obidoa, and L.U.S. Ezeanyika. 2012. Membrane stabilization as a mechanism of the anti-inflammatory activity of methanol extract of Garden Egg (Solanum aethiopicum). DARU-J. Pharm. Sci. 20(76):1–7. (www.darujps.com/content/20/1/76).
- Atuahene-Amankwa, G., A.D. Beatie, T.E. Michaels, and D.E. Falk. 2004. Cropping system evaluation and selection of common bean genotypes for a maize/bean intercrop. African Crop Sci. J. 12(2):105–113.
- Babatunde, F.E. 2000. Effects of intercropping and cropping sequence on the marketable yield and productivity of celosia and okra. J. Agr. Environ. 1:56–61.
- Baumann, O.T., L. Bast, and M.J. Kproff. 2002. Intercropping system optimization for yield, quality and weed suppression, combining mechanistic and descriptive models. Agron. J. 94:734–742.
- Bonsu, K.O., D.A. Fontem, G.O. Nkansah, R.N. Iruome, E.O. Owusu, and R.R. Schippers. 2008. Diversity within the Gboma Eggplant (Solanum marcrocapon), an indigenous vegetable from West Africa. Ghana J. Hort. 1:50–58.
- Brintha, I. and T.H. Seran. 2009. Productivity and economics of Brinjal (Solanum melongena L.) groundnut. J. Food Agr. 2(1):1–7.
- Connolly, J., H.C. Goma, and K. Rahim. 2001. The information content of indicators in intercropping research. Agr. Ecosyst. Environ. 87(2):191–207.
- FDALR (Federal Department of Agricultural Land Resources). (1985). The reconnaissance soil survey of Nigeria, Kaduna, Nigeria. Federal Department of Agricultural Land Resources, Kaduna, Nigeria.
- Genstat 12th edition. 2009. Genstat 12th edition software. VSH international bioscience software and consultancy Hemel Hemstead, UK.
- IITA (International Institute of Tropical Agriculture). 1998. Annual Report for 1998. IITA, Ibadan, Nigeria.
- Lobato, A.K.S., R.C.L. Costa, and C.F. Oliveira-Neto. 2006. NR activity and RWC in Feijao-Caupi under water stress. Proc. 1st Congress Nacional de Feijao-Caupi and 6th Reuniao Nacional de Feijao-Caupi, Teresina, Brasil, 22–26 May 2006.
- Magdi, A.A.M., S.A. Hassan, and G.H. Ashraf. 2012. Row configuration on yield and economics of okra intercropped with eggplant. Intl. J. Veg. Sci. 18(4):358–369.
- Mead, R. and R.W. Willey. 1980. The concept of a land equivalent ratio and advantages in yields from intercropping. Expt. Agr. 16:217–228.
- Missaien, C.M. 1992. The tropical sarden principles for improvement and increased production with application to main vegetable types. CTA Macmillan Ltd., London.
- Moyin-Jesu, E.I. 2003. Incorporation of agricultural biomass and their effects on growth and nutrient content of four successive crops of Amaranthus. Nigerian J. Soil Res. 2:15–20.
- Muoneke, C.O., M.A.O. Ogwuche, and B.A. Kalu. 2007. Effect of maize planting density on the performance of maize/soybean intercropping system in a Guinea savanna agro-ecosystem. African J. Agr. Res. 2:667–677.
- Obi, I.U. 2002. Statistical methods of detecting differences between treatment means and research methodology issues in laboratory and field experiments. AP Express Publishers VED, Nsukka, Nigeria.
- Ofori, K. and D.K. Gamedoagbao. 2005. Yield of Scarlet Eggplant (Solanum aethiopicum L.) as influenced by planting date of companion cowpea. Sci. Hort. 105(3):305–312.
- Olayinka, A.B., H.A. Akintoye, and B. Olasanmi. 2006. Effect of different sources of nitrogen and growth and yield of Solanum macrocarpon in derived savanna of Nigeria. J. Agron. 5(2):182–185.
- Peksen, E. and C. Artik. 2004. Comparison of some Cowpea (Vigna unguiculata L. Walp). J. Agron. 3(2):137–140.
- Santalla, M., J.P. Rodino, P.A. Casquero, and A.M. Dero. 2001. Interrelationships of bush beans intercropped yield and sweet maize. Eur. J. Agron. 15(13):185–196.
- SAS Institute Inc. 2001. SAS/STAT® users’ Guide, ver. 8, 4th ed., Scholars Academic and Scientific Publishers, SAS Institute, Cary, North Caroline, U.S.A.
- Singh, S.B. and H. Ajeigbe. 2007. Improved cowpea–cereals based cropping systems for household food security and poverty reduction in West Africa. J. Crop Improvement 19(1–2):157–172.
- Willey, R.W. 1979. Intercropping: Its importance and research needs. Part 1. Competition and yield advantages. Commonwealth bureau of pasture and field crops. Fld. Crops Abs. 32:1–10. Maharastra, India.