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Indian Journal of Pure & Applied Biosciences (IJPAB)
Year : 2020, Volume : 8, Issue : 6
First page : (222) Last page : (228)
Article doi: :

Estimation of Crop Water Requirement of Maize Crop Using FAO CROPWAT 8.0 Model

M. Roja1* , Ch. Deepthi2 and M. Devender Reddy3
1Ph. D Scholar, 2Assistant  Professor, 3Professor,
Department of Agronomy, M S Swaminathan School of Agriculture
Centurion University of Technology and Management, Paralakhemundi, Odisha, India
*Corresponding Author E-mail:
Received: 5.05.2020 | Revised: 9.06.2020 | Accepted: 16.06.2020 


To use optimum amount of water for crops and reduce irrigation quantity, some form of irrigation scheduling should be used by the farming community. Unscientific and injudicious application of groundwater in this region resulted in depletion of the groundwater table. To achieve effective utilization of the groundwater resources, there is a need to estimate the crop water requirement for different crops at different management levels to accomplish effective irrigation management. Crop water requirements of maize crop in north coastal districts of Andhra Pradesh was calculated using FAO Cropwat 8.0 a computer simulation model. The simulation study was conducted with the objectives of determining irrigation water requirement and irrigation scheduling for some major crops like maize and sugarcane. The Penman -Monteith method was used for evapotranspiration calculation in the model. 80% of critical soil moisture depletion was considered for irrigation. The model predicted the daily, decadal as well as monthly crop water requirement at different growing stages of maize crop. The crop water requirement and irrigation requirement for maize crop 238.6 mm and 212.6 mm. Considering the above findings it was suggested to use the Cropwat 8.0 model to predict the crop water requirements for different crops.

Keywords: Cropwat 8.0, Crop water requirement, Maize, Gross irrigation and Net irrigation.

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Cite this article: Roja, M., Deepthi, C. H., & Devender Reddy, M. (2020). Estimation of Crop Water Requirement of Maize Crop Using FAO CROPWAT 8.0 Model, Ind. J. Pure App. Biosci. 8(6), 222-228. doi: