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Productivity Impact of Improved Maize Varieties in the Eastern Region of Ghana


  • Ramatu M Al-Hassan
  • John Baptist Jatoe
  • Awere Ansong Dankyi


Traditional varieties of maize yields attained by farmers in Ghana are still far below the potential of the new varieties. This raises questions about the technical superiority of the new varieties over the traditional ones and whether the new varieties are being adopted in cultivation. The paper attempts to estimate the efficiencies of the improved varieties to the traditional ones with yield functions and factor payments. Determinants of adoption of new varieties and fertilizer are also assessed with binomial logit models. The results reveal that the plots planted with the traditional varieties have lower residual payments to fixed inputs than the new varieties, mainly due to low yields. It is evident from the results that only the third generation improved varieties have a higher technical efficiency than the traditional ones. Subsistence farmers, tenant farmers, and those in the forest zone are less likely to adopt the improved varieties and fertilizers. However, the study suggests that the performance of improved varieties can be enhanced with higher seed and fertilizer application rates.

Suggested Citation

  • Ramatu M Al-Hassan & John Baptist Jatoe & Awere Ansong Dankyi, 2007. "Productivity Impact of Improved Maize Varieties in the Eastern Region of Ghana," The IUP Journal of Agricultural Economics, IUP Publications, vol. 0(2), pages 7-22, April.
  • Handle: RePEc:icf:icfjag:v:04:y:2007:i:2:p:7-22

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    References listed on IDEAS

    1. Ginarte, Juan C. & Park, Walter G., 1997. "Determinants of patent rights: A cross-national study," Research Policy, Elsevier, vol. 26(3), pages 283-301, October.
    2. Pray, Carl & Ma, Danmeng & Huang, Jikun & Qiao, Fangbin, 2001. "Impact of Bt Cotton in China," World Development, Elsevier, vol. 29(5), pages 813-825, May.
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