Table of Contents
ISRN Agronomy
Volume 2014, Article ID 925450, 7 pages
http://dx.doi.org/10.1155/2014/925450
Research Article

Varietal Trials and Physiological Components Determining Yield Differences among Cowpea Varieties in Semiarid Zone of Nigeria

Department of Crop Production, University of Maiduguri, Maiduguri 600001, Nigeria

Received 18 January 2014; Accepted 25 February 2014; Published 1 April 2014

Academic Editors: O. Ferrarese-Filho and Y. Ito

Copyright © 2014 Nkeki Kamai et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Linked References

  1. I. Inaizumi, B. B. Singh, P. C. Sanginga, V. M. Manyong, A. A. Adesina, and S. Tarawali, Adoption and Impact of Dry-Season Dual-Purpose Cowpea in the Semiarid Zone of Nigeria, Impact (International Institute of Tropical Agriculture), IITA, Ibadan, Nigeria, 1999.
  2. N. C. Muleba, J. B. S. Dabire, I. Drabo, and J. T. Ouedraogo, “Technologies for cowpea production based on genetic and environmental manipulations in the semi-arid tropics,” in Technologies Options for Sustainable Agriculture in Sub-Saharan Africa, T. Bezuneh, A. M. Emechebe, J. Sedgo, and M. Oeudrago, Eds., pp. 192–206, Semi-Arid Food Grain Research and Development Agency (SAFGRAD) of the Scientific, Technical and Research Commission of OAU, Ouagadougou, Burkina Faso, 1997. View at Google Scholar
  3. S. A. Tarawali, B. B. Singh, M. Peters, and S. F. Blade, “Cowpea haulms as fodder,” in Advances in Cowpea Research, B. B. Singh, D. R. M. Raj, K. E. Dashiel, and L. E. N. Jackai, Eds., pp. 313–325, Copublication of International Institute of Tropical Agriculture (IITA) and Japan International Research Centre for Agricultural Sciences (JIRCAS), Ibadan, Nigeria, 1997. View at Google Scholar
  4. FAO, 2000, http://www.fao.org/statistics/en/.
  5. B. B. Singh, “Potential and constraints of improved cowpea varieties in increasing the productivity of cowpea-cereal systems in the dry Savannas of West Africa,” in A Plan to Apply Technology in the Improvement of Cowpea Productivity and Utilisation for the Benefit of Farmers and Consumers in Africa: Proceedings of Cowpea Stakeholders Workshop, P. Majiwa, M. Odera, N. Muchiri, G. Omanya, and P. Werehire, Eds., pp. 14–26, African Agricultural Technology Foundation, Nairobi, Kenya, 2007. View at Google Scholar
  6. Anonymous, “Cowpea: Abuja Securities and Commodity Exchange PLC,” 2008, http://www.abujacomex.com/.
  7. R. Ortiz, “Cowpeas from Nigeria: a silent food revolution,” Outlook on Agriculture, vol. 27, no. 2, pp. 125–128, 1998. View at Google Scholar · View at Scopus
  8. A. Y. Kamara, J. Ellis-Jones, F. Ekeleme et al., “A participatory evaluation of improved cowpea cultivars in the Guinea and sudan savanna zones of north east Nigeria,” Archives of Agronomy and Soil Science, vol. 56, no. 3, pp. 355–370, 2010. View at Publisher · View at Google Scholar · View at Scopus
  9. B. B. Singh, O. L. Chamblis, and B. Sharma, “Recent advances in cowpea breeding,” in Advances in Cowpea Research, B. B. Singh, D. R. M. Raj, K. E. Dashiel, and L. E. N. Jackai, Eds., pp. 30–49, Copublication of International Institute of Tropical Agriculture (IITA) and Japan International Research Centre for Agricultural Sciences (JIRCAS), Ibadan, Nigeria, 1997. View at Google Scholar
  10. J. E. Onyibe, A. Y. Kamara, and L. O. Omoigui, Guide to Cowpea Production in Borno State, Nigeria, Promoting Sustainable Agriculture in Borno State (PROSAB), Ibadan, Nigeria, 2006.
  11. A. K. Raheja, “Problems and prospects of cowpea production in the Nigerian Savannas,” in Proceedings of the 1st World Cowpea Research Conference, Tropical Grain Legume Bulletin, no. 32, pp. 78–87, IITA, November 1986.
  12. B. B. Singh, “Breeding suitable cowpea varieties for West and Central African Savanna,” in Progress in Food Grains Research and Production in Semi-Africa, J. M. Menyonga, J. B. Bezuneh, J. Y. Yayock, and I. Soumana, Eds., pp. 77–85, OAU/STRC-SAFGRAD, Ouagadougou, Burkina Faso, 1994. View at Google Scholar
  13. D. B. Duncan, “Multiple range and multiple F tests,” Biometrics, vol. 11, no. 1, pp. 1–42, 1955. View at Publisher · View at Google Scholar
  14. Soil Moisture Equipment Corp., “Quick draw soil moisture probe,” Operating Instructions Model 2900F1, Soil Moisture Equipment Corp., Santa Barbara, Calif, USA, 1989. View at Google Scholar
  15. P. S. Campos, J. C. Ramalho, J. A. Lauriano, M. J. Silva, and M. D. C. Matos, “Effects of drought on photosynthetic performance and water relations of four Vigna genotypes,” Photosynthetica, vol. 36, no. 1-2, pp. 79–87, 1999. View at Publisher · View at Google Scholar · View at Scopus
  16. C. I. Ogbonnaya, B. Sarr, C. Brou, O. Diouf, N. N. Diop, and H. Roy-Macauley, “Selection of cowpea genotypes in hydroponics, pots, and field for drought tolerance,” Crop Science, vol. 43, no. 3, pp. 1114–1120, 2003. View at Publisher · View at Google Scholar · View at Scopus
  17. K. A. Elemo, “Farmer participating in technology testing: a case of agronomic evaluation of cowpea genotypes in the Nigerian Northern Guinea Savanna,” Agricultural Systems in Africa, vol. 3, no. 1, pp. 39–49, 1993. View at Google Scholar
  18. J. Ellis-Jones and P. S. Amaza, “PROSAB: promoting sustainable agriculture in Borno State: an adoption and impact assessment of PROSAB’s activities over three cropping seasons (2004–2006),” PROSAB Internal Report, 2007. View at Google Scholar
  19. A. Y. Kamara, D. Chikoye, F. Ekeleme, L. O. Omoigui, and I. Y. Dugje, “Field performance of improved cowpea varieties under conditions of natural infestation by the parasitic weed Striga gesnerioides,” International Journal of Pest Management, vol. 54, no. 3, pp. 189–195, 2008. View at Publisher · View at Google Scholar · View at Scopus
  20. N. C. Turner, G. C. Wright, and K. H. M. Siddique, “Adaptation of grain legumes (pulses) to water-limited environments,” Advances in Agronomy, vol. 71, pp. 193–231, 2001. View at Google Scholar · View at Scopus
  21. B. C. Imrie and R. A. Bray, “Estimates of combining ability and variance components of grain yield and associated characters of cowpea,” in Proceeding of the Australian Plant Breeding Conference, pp. 202–204, February 1983.
  22. I. O. Obesesan, “Association among grain yield components in cowpea (Vigna unguiculata L. Walp.),” Genetical Agriculture, vol. 39, no. 4, pp. 377–386, 1985. View at Google Scholar
  23. C. K. Nakawuka and E. Adipala, “A path coefficient analysis of some yield components interactions in cowpea,” African Crop Science Journal, vol. 7, no. 4, pp. 327–331, 1999. View at Google Scholar
  24. M. B. Muli and H. M. Saha, Participatory Evaluation of Cowpea Cultivars for Adaptation and Yield Performance in Coastal Kenya, Kenya Agricultural Research Institute, Regional Research Centre, Mtwapa, Kenya, 2008.
  25. N. A. Gworgwor and H. C. Weber, “Studies on biology and control of Striga: II. Varietal response of cowpea (Vigna unguiculata (L.) Walp.) to Striga gesnerioides,” Journal of Agronomy and Crop Science, vol. 166, no. 2, pp. 136–140, 1991. View at Publisher · View at Google Scholar
  26. B. R. Ntare and J. H. Williams, “Response of cowpea cultivars to planting pattern and date of sowing in intercrops with pearl millet in Niger,” Experimental Agriculture, vol. 28, no. 1, pp. 41–48, 1992. View at Publisher · View at Google Scholar · View at Scopus
  27. K. J. Turk, A. E. Hall, and C. W. Asbell, “Drought adaptation of cowpea. I. Influence of drought on seed yield,” Agronomy Journal, vol. 72, no. 3, pp. 413–420, 1980. View at Publisher · View at Google Scholar
  28. G. A. Ombakho and A. P. Tyagi, “Correlation and path coefficient analysis for yield and its components in cowpea (Vigna unguiculata (L.) Walp.),” East African Agriculture and Forestry Journal, vol. 53, no. 1, pp. 23–27, 1987. View at Google Scholar
  29. J. L. Gallagher and P. V. Biscoe, “Radiation absorption, growth and yield of cereals,” The Journal of Agricultural Science, vol. 91, no. 1, pp. 47–60, 1978. View at Publisher · View at Google Scholar