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Contributions of Seasonal Rainfall to Recent Trends in Cameroon’s Cotton Yields

Author

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  • Ibrahim Njouenwet

    (Laboratory of Environmental Modeling and Atmospheric Physics, Department of Physics, University of Yaounde 1, P.O. Box 812, Yaoundé, Cameroon
    Laboratoire Mixte International “Dynamique des Écosystèmes Continentaux d’Afrique Centrale en Contexte de Changements Globaux” (LMI DYCOFAC), “Institut de Recherche pour le Développement” (IRD, University of Yaoundé 1, IRGM), P.O. Box 1857, Yaoundé, Cameroon)

  • Derbetini Appolinaire Vondou

    (Laboratory of Environmental Modeling and Atmospheric Physics, Department of Physics, University of Yaounde 1, P.O. Box 812, Yaoundé, Cameroon
    Laboratoire Mixte International “Dynamique des Écosystèmes Continentaux d’Afrique Centrale en Contexte de Changements Globaux” (LMI DYCOFAC), “Institut de Recherche pour le Développement” (IRD, University of Yaoundé 1, IRGM), P.O. Box 1857, Yaoundé, Cameroon)

  • Stephanie Vanessa Ngono Ashu

    (Laboratory of Environmental Modeling and Atmospheric Physics, Department of Physics, University of Yaounde 1, P.O. Box 812, Yaoundé, Cameroon)

  • Robert Nouayou

    (Laboratory of Geophysics and Geoexploration, Department of Physics, University of Yaoundé 1, P.O. Box 812, Yaoundé, Cameroon)

Abstract

Cotton yields in the Sudano-Sahelian region contribute to food security through their role in agricultural productivity. Daily precipitation data and cotton yield data were synthesized from nine agricultural regions obtained from the “Société de Développement du Coton (SODECOTON)”. The following seasonal rainfall indices—from Cameroon’s cotton zone—were mapped with geographic information systems for spatial analysis: wet season onset and retreat date, rainfall amount, number of rainy days, rainfall intensity (SDII), heavy-rainfall events (R95p), consecutive dry days (CDD), annual highest daily precipitation (Rx1day) and number of very heavy precipitation days (R20mm). Linear regressions were used as statistical tools for analysis. The strongest relationships were observed between cotton yields and the heavy-rainfall events, closely followed by seasonal rainfall amount. An increase in consecutive dry days (CDD) and heavy events, and a decreased seasonal rainfall amount, have a negative impact on cotton yield trends. Overall, the critical breakpoint analysis between cotton yields and all rainfall indices showed that the cotton yield was particularly negatively impacted before a 251 retreat date, 591 mm seasonal rainfall amount and 33 rainy days. By contrast, an onset date, rainfall intensity, heavy rainfall, CDD, Rx1day and R20mm of 127, 12.5 mm·day −1 , 405 mm, 27 days, 67 mm and 22 days, respectively, were identified for an optimum cotton yield. These results can be used as information for agricultural activity and management, civil planning of economic activities and can also contribute to furthering our understanding of the management impacts on future food security.

Suggested Citation

  • Ibrahim Njouenwet & Derbetini Appolinaire Vondou & Stephanie Vanessa Ngono Ashu & Robert Nouayou, 2021. "Contributions of Seasonal Rainfall to Recent Trends in Cameroon’s Cotton Yields," Sustainability, MDPI, vol. 13(21), pages 1-13, November.
    • Handle: RePEc:gam:jsusta:v:13:y:2021:i:21:p:12086-:d:670367
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    References listed on IDEAS

    as
    1. Elodie Blanc & Philippe Quirion & Eric Strobl, 2008. "The climatic determinants of cotton yields: Evidence from a plot in West Africa," Post-Print hal-00715567, HAL.
    2. Benjamin Sultan & Marthe Bella-Medjo Tsogo & Alexis Berg & Philippe Quirion & Serge Janicot, 2010. "Multi-scales and multi-sites analyses of the role of rainfall in cotton yields in West Africa," Post-Print hal-00715552, HAL.
    3. Antoine Leblois & Philippe Quirion & Benjamin Sultan, 2013. "Price vs. weather shock hedging for cash crops: ex ante evaluation for cotton producers in Cameroon," Working Papers hal-00796528, HAL.
    4. Neville Nicholls, 1997. "Increased Australian wheat yield due to recent climate trends," Nature, Nature, vol. 387(6632), pages 484-485, May.
    5. Ibrahim Njouenwet & Derbetini Appolinaire Vondou & Elisabeth Fita Dassou & Brian Odhiambo Ayugi & Robert Nouayou, 2021. "Assessment of agricultural drought during crop-growing season in the Sudano–Sahelian region of Cameroon," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 106(1), pages 561-577, March.
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    1. Nonki, Rodric M. & Amoussou, Ernest & Lennard, Christopher J. & Lenouo, André & Tshimanga, Raphael M. & Houndenou, Constant, 2023. "Quantification and allocation of uncertainties of climate change impacts on hydropower potential under 1.5 °C and 2.0 °C global warming levels in the headwaters of the Benue River Basin, Cameroon," Renewable Energy, Elsevier, vol. 215(C).
    2. Nguepi Tsafack Elvis & Hua Cheng & Buregeya Ingabire Providence, 2023. "Exploring the Optimistic Approaches and Directives of Cameroon’s Textile Sector for Reliable Development," Sustainability, MDPI, vol. 15(7), pages 1-20, March.

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