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Irrigation scheduling is the process of deciding when and how much irrigation to apply to a field. Applying too little irrigation water can cause crop losses and yield reduction, but applying too much water can waste money, fertilizer, and labor, and can even decrease yields in some cases. The goal of this bulletin is to provide information that can help irrigators schedule irrigation using the checkbook method. It describes some of the benefits of irrigation scheduling and general factors that influence the amount and timing of irrigation needs. It then describes the data needed for checkbook irrigation scheduling and how to get this data, the calculations involved, and software/apps that can be used to help with these calculations.
Virginia Cooperative Extension materials are available for public use, reprint, or citation without further permission, provided the use includes credit to the author and to Virginia Cooperative Extension, Virginia Tech, and Virginia State University.
Issued in furtherance of Cooperative Extension work, Virginia Polytechnic Institute and State University, Virginia State University, and the U.S. Department of Agriculture cooperating. Edwin J. Jones, Director, Virginia Cooperative Extension, Virginia Tech, Blacksburg; M. Ray McKinnie, Administrator, 1890 Extension Program, Virginia State University, Petersburg.
January 30, 2019