Osama and Ali Greener Journal of Agricultural Sciences Vol. 3 (2), pp.150-163, February 2013 ISSN: 2276-7770 Research Paper Manuscript Number:121712325 DOI: http://dx.doi.org/10.15580/GJAS.2013.2.121712325 A Computer program for Calculating Crop Water Requirements Osama Osman Ali Department of Agricultural Engineering, Faculty of Agricultural Technology and Fish Sciences, Al -Neelain University, Sudan Author’s Email: osama12660 @ hotmail. com. Tel :+(249)912660468 Abstract: A computer program was developed for determination of crop water requirements using local meteorological and research data, and also using Visual Basic 6.0 Programming language. For verification of the model, field trials were carried out during the period December 2007 – July 2008 at four schemes using center-pivot irrigations in the northern parts of Sudan. The program was based on using Penman equation and Penman-Monteith method. Results were comparable to those obtained through traditional time-consuming methods. The program could offer a simple tool for planning crop water requirements for agricultural projects. Keywords: computer program, crop water requirement, modified penman equation, penman monteith method. Return to Content View [Full Article – PDF] [Full Article – HTML] [Full Article – EPUB] Reference: FAO (2000). Yearbook. Production. Vol. 55. Food and Agriculture Organization of the United Nations, Rome. Wayne DC and Haise HR (1957). Irrigation in arid regions. The Year Book of Agric. The U.S. Department of Agriculture, Washington. Ali OO (2002). Evaluation of the performance of centre pivot irrigation system. M.Sc. Thesis, University of Khartoum, Sudan. Ali. O.O.(2008). A Simulation model for centre pivot irrigation system design and optimization of operation. PhD. Thesis, University of Khartoum, Sudan. Ahmed TA (2005). Response of groundnut (Archis hypogaea L.) growth and yield to different irrigation regimes and tillage systems under New Halfa area conditions. Ph.D. Thesis, Faculty of Agriculture, University of Khartoum. Doorenbos J and Pruitt WO (1977). Crop water requirement. FAO Irrigation and Drainage, Paper No. (24), FAO, Rome, Italy. Teare ID and Peet MM (1983). Crop water relations. A Wiley Inter-Science Publication, USA. Doorenbos J, Kassam AH, Bentrelsen CLM, BranscheidV, Ptusje JMGA, Smith M, Uittenbogaard GO and Van Der Wall HK (1986). Yield response to water FAO. Irrigation and Drainage, Paper No.33. Smith M (2000). The application of climatic data for planning and management of sustainable rainfed and irrigated crop production. Agricultural and Forest Meteorology.