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All Journal International Journal on Food, Agriculture and Natural Resources (IJFANRES)
Enyew, Alebachew
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Agriculture, Biological Sciences & Forestry

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Effect of irrigation frequency and depth on yield and water productivity of Field Pea at Koga and Rib irrigation Scheme, Ethiopia Tewabe, Dires; Enyew, Alebachew; Abebe, Atalktie; Tsgie, Amare; Worku, Mulugeta
International Journal on Food, Agriculture and Natural Resources Vol 6, No 3 (2025): IJ-FANRES
Publisher : Food, Agriculture and Natural Resources - NETWORKS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46676/ij-fanres.v6i3.494

Abstract

Efficient irrigation scheduling is crucial for optimising crop yield and water productivity, particularly in water-scarce regions. This study evaluated the effects of different irrigation frequencies and depths on the yield and water productivity of field pea (Pisum sativum L.) at the Koga and Rib irrigation schemes in Ethiopia over two growing seasons. A factorial experiment with two irrigation intervals (10 and 14 days) and five irrigation depths (50 %, 75 %, 100 %, 125 %, and 150 % of crop water requirement) was conducted using a split-plot design with three replications. The results revealed that irrigation scheduling significantly influenced both grain yield and water productivity at both sites. At Koga, the highest grain yield (2.12 t ha⁻¹) and optimal water productivity (0.55 kg m⁻³) were achieved by irrigating at 100 % crop water requirement (CWR) every 10 days. Conversely, at Rib, the highest yield (3.21 t ha⁻¹) and water productivity (1.05 kg m-3) were obtained with 75 % CWR applied every 10 days. Increasing irrigation depth beyond these optimal levels did not further enhance yield and led to a decline in water productivity. These findings suggest that site-specific irrigation scheduling is essential for maximising field pea production while improving water use efficiency. The study recommends irrigating field pea at 100% CWR every 10 days in Koga and 75 % CWR every 10 days in Rib to achieve the best balance between yield and water conservation.
Improve water productivity and yield through participatory approaches in small-scale irrigation schemes: A case of Shimburit irrigation schemes, Ethiopia Tewabe, Dires; Abebe, Atklte; Enyew, Alebachew; Tsige, Amare; Worku, Mulugeta; Getaneh, Sisay; Kendie, Hailu
International Journal on Food, Agriculture and Natural Resources Vol 6, No 3 (2025): IJ-FANRES
Publisher : Food, Agriculture and Natural Resources - NETWORKS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46676/ij-fanres.v6i3.493

Abstract

Small-scale irrigation schemes in Ethiopia are pivotal for improving agricultural productivity and food security. However, poor water management, infrastructural maintenance, and agronomic practices hinder the potential of the scheme. This study evaluates the Shimburit small-scale irrigation scheme in Ethiopia, focusing on water and crop productivity. Data were collected through surveys, interviews, and field demonstrations of full-package treatments (advanced water and crop management) with conventional farmer practices. Three representative locations were selected from local farmers, considered as replications and wheat was used as a test crop. The results revealed that current irrigated areas were reduced by 25 % of the initially designed capacity. Poor water management practices, seepage and inadequate maintenance were identified as major issues. Adoption of improved irrigation technologies (full-package) treatment gave 3.97 tons ha-1 of grain yield and 0.94 kg m-3 of water productivity. This reveals that advanced water and crop management practices improve wheat yield by 60.7 % and water productivity by 70.9 % as compared to conventional practice. Therefore, advanced water and crop management is essential for enhancing yield and water productivity that supports Ethiopia’s agricultural development goals.
Co-Authors Abebe, Atalktie Abebe, Atklte Getaneh, Sisay Kendie, Hailu Tewabe, Dires Tsgie, Amare Tsige, Amare Worku, Mulugeta