Abstract            Volume:12  Issue-7  Year-2024         Original Research Articles

Online ISSN : 2347 - 3215 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcret@gmail.com

Determination of crop water requirement (CWR) is essential for better irrigation practices, irrigation practices and efficient use of water. A study was carried out to determine the crop water requirement and irrigation scheduling of potato crop grown under irrigated conditions at Holeta, Central Highland of Ethiopia. The 30-year climatic data (1993- 2023) collected from Holeta Agricultural Research Center were used for ETo determination. The results shows that, the maximum ETo was recorded in February and March which was 4.2 mm/day whereas the minimum value of 2.6 mm/day was recorded in July. Effective rainfall of 175 mm was maximum in August while the effective rainfall was zero in November and December. The CWR, NIR and GIR for potato crop was 444.9 mm, 371.7 mm and 741.5 mm respectively. For the 1st January planted potato irrigation should be given nine times (1-Jan, 12-Jan, 26-Jan, 9-Feb, 21-Feb, 5- Mar, 16-Mar, 26-Mar, and last irrigation on 6-Apr) with a gross irrigation water amount of 38.5 mm, 33.4 mm, 40.4 mm, 49.9 mm, 64.1 mm, 63.9 mm, 66.3 mm, 63.9 mm, and 67.6 mm depth respectively. The results of this study can be useful in preventing over or under-irrigation and for future planning of water resource, thereby helping to save water in meeting the CWRs, and can be used as a guide for farmers to select the amount and frequency of irrigation for the crops being studied.

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