EFFECT OF RAINFALL VARIABILITY ON CROP PRODUCTIVITY IN IDOFIAN, KWARA STATE, NIGERIA

Authors

  • M. B. Makanjuola National Centre for Agricultural Mechanization, Ilorin, Nigeria. Author
  • D. James National Centre for Agricultural Mechanization, Ilorin, Nigeria. Author
  • M. Y. Kasali National Centre for Agricultural Mechanization, Ilorin, Nigeria. Author

Keywords:

Rainfall variability and distribution, specific rainfall threshold, yield

Abstract

Rainfall data for Idofian were analyzed for monthly and weekly rainfall probabilities at various thresholds
and correlated with yield. The mean annual rainfall is 1195 mm with a coefficient of variation (CV) of
19.6% while the mean weekly rainfall is 21.5 mm with a CV of 56% indicating very high weekly rainfall
variability. 40% of the years received rainfall above annual mean value which was distributed unevenly
during the cropping season. The months of May to September had high probabilities of occurrence with
September having the highest for the thresholds considered. Positive correlation between yield and rainfall
was recorded for cowpea, melon, rice. The predictability of yield using rainfall was however, low.

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Published

2025-05-10

Issue

Vol. 22 No. 3 (2014): JOURNAL OF AGRICULTURAL ENGINEERING AND TECHNOLOGY (JAET)

Section

Articles