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Exploiting Cropping Management to Improve Agricultural Water Use Efficiency in the Drylands of Eastern Uganda

Author

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  • Mulebeke, Robert
  • Kironchi, Geoffrey
  • Tenywa, Moses M.

Abstract

A remarkable challenge lies in maximizing agricultural water productivity, particularly in the drought prone regions of sub Saharan Africa. It is hypothesized that water use efficiency (WUE) can be increased by selection of appropriate cropping management systems. This study seeks to establish the effects of cropping management on water use efficiency in cassava-sorghum cropping systems in the drylands of eastern Uganda. A randomised complete block design (RCBD) consisting of six treatments: sole cassava, sole sorghum, sole cowpea, cassava + sorghum, cassava + cowpea, and sorghum + cowpea, replicated three times were used. Two tillage practices; mouldboard ploughing (Mb) and, ripping (Rp) were used to assess the effect of tillage. WUE (kg ha-1 mm-1) was calculated as a ratio of yield (kg ha-1) to evapotranspiration (ET) (mm). ET was estimated using the soil water balance. WUE varied significantly (?= 0.05) between cropping systems with the highest observed in cassava (34.38 kg ha-1 mm-1) while the lowest was 3.76 kg ha-1 mm-1 for sorghum. WUE did not differ appreciably in both Mb and Rp tillage practices. Farmers growing sole cassava could use either of the tillage practices. The best yield was recorded in cassava + cowpea cropping system under Mb ploughing and sole sorghum under Rp gave the poorest combined yield (1,676 kg ha-1).

Suggested Citation

  • Mulebeke, Robert & Kironchi, Geoffrey & Tenywa, Moses M., 2015. "Exploiting Cropping Management to Improve Agricultural Water Use Efficiency in the Drylands of Eastern Uganda," Sustainable Agriculture Research, Canadian Center of Science and Education, vol. 4(2).
    • Handle: RePEc:ags:ccsesa:230396
    DOI: 10.22004/ag.econ.230396
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    References listed on IDEAS

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    1. Van Vosselen, A. & Verplancke, H. & Van Ranst, E., 2005. "Assessing water consumption of banana: traditional versus modelling approach," Agricultural Water Management, Elsevier, vol. 74(3), pages 201-218, June.
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    Cited by:

    1. Joselyne Najera & Paula Arzadun & Monica Navarro & Martin Solis, 2018. "High-Quality Input Choice under Uncertainty and Ambiguity: An Exploratory Study of Costa Rica's Coffee Sector," Journal of Economics and Behavioral Studies, AMH International, vol. 10(5), pages 156-166.
    2. Yu Liu & Xiaohong Hu & Qian Zhang & Mingbo Zheng, 2017. "Improving Agricultural Water Use Efficiency: A Quantitative Study of Zhangye City Using the Static CGE Model with a CES Water−Land Resources Account," Sustainability, MDPI, vol. 9(2), pages 1-15, February.

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