Validations of CROPWAT Based Irrigation Practice for Tomato Productivity in Lowland Hot Humid Area of Ethiopia


  • Temesgen F Adamtie Ethiopian Institute of Agricultural Research, Pawe, Ethiopia.
  • Demeke T Mitku Ethiopian Institute of Agricultural Research, Pawe, Ethiopia.
  • Abeba Hassen Ethiopian Institute of Agricultural Research, Pawe, Ethiopia.



Crop water requirement, Irrigation Scheduling, CROPWAT, Tomato


The efficient management of applied water volume and wise water application is accomplished by irrigation scheduling. Microclimate is the most important factor affecting the irrigation schedule, which determines when and how much irrigation water will be used. The objective of this experiment was to validate the experimental effects of CROPWAT irrigation practice compared to farmer’s practice on crop and water productivity of tomato. The CROPWAT Penman–Monteith method was used to calculate crop water requirement and irrigation scheduling of tomato as compared to farmers irrigation practice. The total water applied were 1087.5mm and 1275.5mm for 2020 and 895.3mm and 1242.6mm for 2021 respectively for CROPWAT and farmers’ practice. The obtained validated result revealed that farmers' irrigation practices for marketable tomato fruit were 25.8% lower when based on CROPWAT irrigation practice, while those for unmarketable tomato fruit were 46.18% lower. In contrast to farmers' irrigation practices, the CROPWAT irrigation system can reduce loss by 46.1 percent for the production of tomato fruit. Similarly for tomato water productivity, CROPWAT-based irrigation systems received an incremental 37.5 percent advantage over farmers' practices. As a result, this study came to the conclusion that CROPWAT-based irrigation practices are crucial for field crop irrigation scheduling and crop water requirements. The study will contribute to bettering tomato fruit productivity and water resource management. This study might serve as a guide for making choices regarding upcoming planning.


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Adametie, T. F. & Mitku, D. T. (2021). Experimental Evaluations of CROPWAT8 Irrigation Scheduling for Hot Pepper and WUE Through on-Farm Participatory Approaches, Northwest Ethiopia. American Journal of Agriculture and Forestry 9(4): 189-200.

Allen, R. G., Pereira, L. S., Raes, D. & Smith, M. (1998a). Crop evapotranspiration-Guidelines for computing crop water requirements-FAO Irrigation and drainage paper 56. Fao, Rome 300(9): D05109.

Allen, R. G., Pereira, L. S., Raes, D. & Smith, M. (1998b). FAO Irrigation and drainage paper No. 56. Rome: Food and Agriculture Organization of the United Nations 56(97): e156.

Assefa, T., Jha, M., Reyes, M., Tilahun, S. & Worqlul, A. W. (2019). Experimental evaluation of conservation agriculture with drip irrigation for water productivity in sub-Saharan Africa. Water 11(3): 530.

Assefa, T. T., Adametie, T. F., Yimam, A. Y., Belay, S. A., Degu, Y. M., Hailemeskel, S. T., Tilahun, S. A., Reyes, M. R. & Prasad, P. (2021). Evaluating Irrigation and Farming Systems with Solar MajiPump in Ethiopia. Agronomy 11(1): 17.

Belay, S. A., Assefa, T. T., Prasad, P., Schmitter, P., Worqlul, A. W., Steenhuis, T. S., Reyes, M. R. & Tilahun, S. A. (2020). The response of water and nutrient dynamics and of crop yield to conservation agriculture in the Ethiopian highlands. Sustainability 12(15): 5989.

Beyene, A. A. (2018).Water balance, extent and efficiency of irrigation in the Lake Tana basin, Ethiopia. Ghent University.

Bokke, A. S. & Shoro, K. E. (2020). Impact of effective rainfall on net irrigation water requirement: The case of Ethiopia. Water Science 34(1): 155-163.

Bos, M. G., Kselik, R. A., Allen, R. G. & Molden, D. (2008). Water requirements for irrigation and the environment. Springer Science & Business Media.

Bouyoucos, G. J. (1962). Hydrometer method improved for making particle size analyses of soils 1. Agronomy journal 54(5): 464-465.

De Winter, J. C. (2013). Using the Student's t-test with extremely small sample sizes. Practical Assessment, Research, and Evaluation 18(1): 10.

Dieci, P. & Viezzoli, C. (1992). Resettlement and Rural Development in Ethiopia: Social and Economic Research. Training and Technical Assistance in the Beles Valley.

Eng, J. (2003). Sample size estimation: how many individuals should be studied? Radiology 227(2): 309-313.

Eshete, D. G., Sinshaw, B. G. & Legese, K. G. (2020). Critical review on improving irrigation water use efficiency: Advances, challenges, and opportunities in the Ethiopia context. Water-Energy Nexus 3: 143-154.

Evans, R. G. & Sadler, E. J. (2008). Methods and technologies to improve efficiency of water use. Water resources research 44(7).

Ewaid, S. H., Abed, S. A. & Al-Ansari, N. (2019). Crop water requirements and irrigation schedules for some major crops in Southern Iraq. Water 11(4): 756.

Gabr, M. E. (2021). Modelling net irrigation water requirements using FAO-CROPWAT 8.0 and CLIMWAT 2.0: a case study of Tina Plain and East South ElKantara regions, North Sinai, Egypt. Archives of Agronomy and Soil Science: 1-16.

Ismail, S. M. & Ozawa, K. (2009).Effect of irrigation interval on growth characteristics, plant water stress tolerance and water use efficiency for Chile pepper. In Thirteenth International Water Technology Conference, IWTC, Vol. 13, 545-556.

Jha, A. K., Malla, R., Sharma, M., Panthi, J., Lakhankar, T., Krakauer, N. Y., Pradhanang, S. M., Dahal, P. & Shrestha, M. L. (2016). Impact of irrigation method on water use efficiency and productivity of fodder crops in Nepal. Climate 4(1): 4.

Jones, H. (2006).Irrigation scheduling–comparison of soil, plant and atmosphere monitoring approaches. In V International Symposium on Irrigation of Horticultural Crops 792, 391-403.

Kuo, S.-F., Lin, B.-J. & Shieh, H.-J. (2001). CROPWAT model to evaluate crop water requirements in Taiwan. International Commission on Irrigation and Drainage.

Kuşçu, H., Turhan, A. & Demir, A. O. (2014). The response of processing tomato to deficit irrigation at various phenological stages in a sub-humid environment. Agricultural Water Management 133: 92-103.

Mariyea, M., Maryob, M., Dinkec, T., Changminga, Y. & Weldegebriala, B. Land cover, land use Changes and Agroforestry Practices at Pawe Resettlement District, Ethiopia.

Markos, D. & Mekonen, S. Effects of Inter and Intra Row Spacing on Growth and Yield Components of Hot Pepper.

Marković, M., Šoštarić, J., Josipović, M., Petošić, D., Šimunić, I. & Zebec, V. (2014).Implementation of irrigation scheduling based on monitoring of soil moisture content in extreme weather conditions. In Proceedings of TEAM 2014 6 th International Scientific and Expert Conference of the International TEAM Society 10–11 th November 2014, Kecskemét, Hungary, 34.

Nikolaou, G., Neocleous, D., Christou, A., Kitta, E. & Katsoulas, N. (2020). Implementing sustainable irrigation in water-scarce regions under the impact of climate change. Agronomy 10(8): 1120.

Poornima, D., Ayyanagowdar, M., Polisgowadar, B., Nemichandrappa, M., Ravi, M., Lata, H. & Ramesh, G. (2020). Estimation of crop water requirement and irrigation scheduling of baby corn using CROPWAT model. J Pharmacogn Phytochem 9(1): 1944-1949.

Raine, S., Meyer, W., Rassam, D., Hutson, J. L. & Cook, F. (2007). Soil–water and solute movement under precision irrigation: knowledge gaps for managing sustainable root zones. Irrigation Science 26(1): 91-100.

Roja, M., Deepthi, C. & Devender Reddy, M. (2020). Estimation of Crop Water Requirement of Maize Crop Using FAO CROPWAT 8.0 Model. Indian Journal of Pure and Applied Biosciences 8(6): 222-228.

Salau, A. W., Hammed, O. B., Makinde, E. A. & Olosunde, O. M. (2019). Growth and fruit yield of pepper species as affected by plant spacing. International Journal of Vegetable Science 25(2): 164-175.

Savva, A. P. & Frenken, K. (2002). Crop water requirements and irrigation scheduling. FAO Sub-Regional Office for East and Southern Africa Harare.

Sharma, V. & Bhambota, S. (2022).Strategies to Improve Crop-Water Productivity. In Food, Energy, and Water Nexus, 149-172: Springer.

Smith, M. (1992). CROPWAT: A computer program for irrigation planning and management. Food & Agriculture Org.

Stevens, J. B. (2007).Adoption of irrigatio scheduling methods in South Africa. University of Pretoria.

Tefera, A. H. & Mitku, D. T. (2017). Determination of Optimum Irrigation Scheduling and Water Use Efficiency for Maize Production in North-West Ethiopia. Environmental science. Journal of natural science research 559722514.

Yeshiwas, Y., Belew, D. & Tolessa, K. (2016). Tomato (Solanum lycopersicum L.) Yield and fruit quality attributes as affected by varieties and growth conditions. World Journal of Agricultural Sciences 12(6): 404-408.

Yimam, A. Y., Assefa, T. T., Adane, N. F., Tilahun, S. A., Jha, M. K. & Reyes, M. R. (2020). Experimental evaluation for the impacts of conservation agriculture with drip irrigation on crop coefficient and soil properties in the sub-humid Ethiopian Highlands. Water 12(4): 947.

Yohannes, D. F., Ritsema, C., Eyasu, Y., Solomon, H., van Dam, J., Froebrich, J., Ritzema, H. & Meressa, A. (2019). A participatory and practical irrigation scheduling in semiarid areas: the case of Gumselassa irrigation scheme in Northern Ethiopia. Agricultural Water Management 218: 102-114.

Zotarelli, L., Dukes, M. D., Romero, C. C., Migliaccio, K. W. & Morgan, K. T. (2010). Step by step calculation of the Penman-Monteith Evapotranspiration (FAO-56 Method). Institute of Food and Agricultural Sciences. University of Florida.




How to Cite

Adamtie, T. F., Mitku , D. T. ., & Hassen, A. . (2022). Validations of CROPWAT Based Irrigation Practice for Tomato Productivity in Lowland Hot Humid Area of Ethiopia . American Journal of Life Science and Innovation, 1(1), 27–35.