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United States Department of Agriculture

Agricultural Research Service

Title: Irrigation Scheduling Using the "scs-Scheduler" Computer Program

Authors
item Howell, Terry
item Johnson, Karl - JOHNSON FARMS
item Dusek, Donald

Submitted to: Conservation and Production Field Day Proceedings
Publication Type: Research Notes
Publication Acceptance Date: June 7, 1995
Publication Date: N/A

Interpretive Summary: No Interpretive Summary necessary. Handout for High Plains Wheat Field Day, June 7, 1995, Etter, TX. In cooperation with Texas A&M University System Agriculture Program, Texas Agriculture Experiment Station, and Texas Agriculture Extension Service.

Technical Abstract: The SCS-Scheduler can improve irrigation water management but has not been evaluated widely in the Western U.S. The SCS-Scheduler program was evaluated on a farm in the Texas North Plains since 1991. The program provided useful information to the grower to schedule irrigations for winter wheat, corn, and sorghum. Field yields from scheduled fields were considerably above county-wide average irrigated yields, and water use efficiency values indicated good irrigation management. Crop coefficients were determined for use in the SCS-Scheduler for wheat, corn, sorghum based on measured evapotranspiration at Bushland. The SCS-Scheduler PET (potential evapotranspiration) method was found comparable with the NP-PET values based on the Penman-Monteith equation but slightly higher than those estimated using REF-ET based on the American Society of Civil Engineers (ASCE) Manual No. 70.

Last Modified: 12/21/2014
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