Water Productivity Journal (WPJ) Quarterly Publication

Document Type : Original Research Paper

Authors

1 Lecturer, Department of Geography and Environmental Science, University of Zimbabwe, Mount Pleasant, Harare, Zimbabwe

2 Department of Earth Sciences, University of the Western Cape, Cape Town, South Africa

10.22034/wpj.2021.275170.1033

Abstract

This study determines the effects of variations in relative water supply (RWS) on bean and wheat crop water productivity (WP) under irrigation in Block C at Nyanyadzi irrigation scheme in Zimbabwe. Water supply, bean and wheat crop yield data spanning 17 cropping seasons from 1970 to 2003 were obtained from the irrigation scheme files. Research findings show a weak and significant (R2=0.448, p = 0.006) quadratic relationshipbetween bean WP and RWS. Whereas, for the wheat crop, the relationship WP and RWS is a linear and significant (R2 = 0.438, p = 0.004). Based on the research findings, the study recommends the measures to improve water supply and therefore, crop production. These include among others, switching to more drought tolerant crop varieties that require less water, rainfall harvesting, water conservation measures to retain soil water and, use of more efficient water application methods.

Keywords

Main Subjects

Benavides, J., Hernández-Plaza, E., Mateos, L. and Fereres, E. (2021). A global analysis of irrigation scheme water supplies in relation to requirements. Agricultural Water Management, 243: 106-457.
Bennett, D. R. and Harms, T. E. (2011). Crop yield and water requirement relationships for major irrigated crops in Southern Alberta, Canadian. Water Resources Journal, 36(2): 159-170, DOI: 10.4296/cwrj3602853.
Carr, T., Yang, H. and Ray, C. (2016). Temporal variations of water productivity in irrigated corn: An analysis of factors influencing yield and water use across Central Nebraska. PLoS ONE 11(8): e0161944. https://doi.org/10.1371/journal.pone.0161944
Clemens, A. J. and Molden, D. J. (2007). Water uses and productivity of irrigation schemes. Irrigation Science, 25: 247-261.
Faramarzi, M., Yang, H., Schulin, R. and Abbaspour, K.C. (2010). Modeling wheat yield and crop water productivity in Iran: Implications of agricultural water management for wheat production. Agricultural Water Management, 97(11): 1861-1875.
FAO. (2000). Socio-economic impact of smallholder irrigation in Zimbabwe: Case studies of ten Irrigation schemes. FAO SAFR, Harare.
FAO. (2002). Crops and drops: Making the best use of water for agriculture. FAO, Rome. FAO. (2003). Unlocking the water potential of agriculture. FAO, Rome.
Foley, D.J., Thenkabail, P.S., Aneece, I.P., Teluguntla, P.G. and Oliphant, A.J. (2020). A meta-analysis of global crop water productivity of three leading world crops(wheat, corn, and rice in the irrigated areas over three decades. International Journal of Digital Earth, 13: 939-975.
Gilland, B. (2002). World population and food supply: Can food production keep pace with population growth in the next half-century? Food Policy, 27(1): 47-63.
Kemerink-Seyoum, J.S., Chinguno, N.L.T., Seyoum, S.D., Ahlers, R., Bolding, J.A. and van der Zaag, P. (2017). Jumping the water queue: Changing waterscapes under water reform processes in rural Zimbabwe. Water SA, 43(3): 423-432. https://doi.org/10.4314/wsa.v43i3.07
Kemerink-Seyoum, J.S., Chitata, T., Domínguez Guzmán, C., Novoa-Sanchez, L.M. and Zwarteveen, M.Z. (2019). Attention to sociotechnical tinkering with irrigation infrastructure as a way to rethink water governance. Water, 11(8): 1108-1670. https://doi.org/10.3390/w11081670
Kumari, M., Singh, O.P. and Meena, D.C. (2017). Crop water requirement, water productivity and comparative advantage of crop production in different regions of Uttar Pradesh, India. Int.J.Curr. Microbiol. App.Sci, 6(7): 2043-2052.
doi: https://doi.org/10.20546/ijcmas.2017.607.24
Li, X., Zhang, X., Niu, J., Tong, L., Kang, S., Du, T., Li, S. and Ding, R. (2016). Irrigation water productivity is more influenced by agronomic practice factors than by climatic factors in Hexi Corridor, Northwest China. Scientific Reports 6 (37971).
Mujere, N. (2011). Effects of river flow variations on irrigated crop yields at Nyanyadzi irrigation scheme in Zimbabwe. Lambert Academic Publishing, Germany.
Sivakumar, M.V.K. (2021). Climate change and water productivity. Water Productivity Journal, 1(3): 1-12. ppPearce, G. R. and Armstrong, A.S.B. 1990. Small irrigation design, Nyanyadzi, Zimbabwe: Summary report of studies on field-level water use and distribution, Report ODI 98, HR Wallingford, UK.
Scoones, I., Murimbarimba, F. and Mahenehene, J. (2019). Irrigating Zimbabwe after land reform: The potential of farmer-led systems. Water Alternatives, 12(1): 88-106.
Seckler, D. (1999) Water scarcity and challenge of increasing water use efficiency and productivity: Sustainable agriculture solutions. Novello Press, London.
UNDP. (2019). Let it flow: Adapting the Nyanyadzi Irrigation Scheme to climate change. UNDP, Harare.
Yokwe, S. (2009). Water Productivity in smallholder irrigation schemes in South Africa. Agricultural Water Management, 96(8): 1223-1229.
Zhang, Sh., Dong. Q., Zhanf, L. and Xiong, Y. (2016). Effects of water washing and torrefaction on the pyrolysis behavior and kinetics of rice husk through TGA and Py-GC/MS. Bioresource Technology, 199(1): 352-361.
Zoebl, D. (2006). Is water productivity a useful concept in agricultural water management? Agricultural Water Management, 83(3): 265-273.