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Cotton Irrigation Strategies Nicholas Kenny Texas AgriLife Extension Service – Amarillo

Cotton Irrigation Strategies Nicholas Kenny Texas AgriLife Extension Service – Amarillo 11 January 2011– Memphis Ag Day. Improving Lives. Improving Texas. Photo Credit: Texas AgriLIFE Extension Office: Randall County. Max yield at 19”. Peak at 12”. Max at 15”. Max at 18”.

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Cotton Irrigation Strategies Nicholas Kenny Texas AgriLife Extension Service – Amarillo

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  1. Cotton Irrigation Strategies Nicholas Kenny Texas AgriLife Extension Service – Amarillo 11 January 2011– Memphis Ag Day Improving Lives. Improving Texas.

  2. Photo Credit: Texas AgriLIFE Extension Office: Randall County

  3. Max yield at 19”

  4. Peak at 12”

  5. Max at 15”

  6. Max at 18”

  7. Soil Storage Considerations

  8. Pre-Water Cotton???

  9. Cotton Planting Requirements Staci Gray – Lubbock Online

  10. 2009: 1637 < GDD < 1813

  11. Water Up Cotton Sooner Germination Uniform Germination Efficient Water Use www.ipm.ncsu.edu/cotton

  12. Seasonal Cotton Water Use http://gotherefore.net/CottonHarvest.jpg

  13. ~ 3 GPM / Acre

  14. 75%  9-11” Irrigation

  15. Saturation Field Capacity (FC) Total Available Water Stress Point Refill Point Permanent Wilting Point (PWP)

  16. Application Rate vs. Runoff / Percolation Derrel L. Martin, et al: University of Nebraska - Lincoln ASABE Proceedings IRR10-9282

  17. Irrigation Cut-out (Late-August) http://www.plant.uoguelph.ca/courses/pbio-3110/documents/Cotton_08.pdf

  18. 3rd Week of August

  19. Capacitance Probe: Soil Water Monitoring

  20. Total Water, S5-Aspy June 30 9.31” Sept. 20 7.29” July 30 8.90”

  21. Corn Water Uptake Chart: S5, Aquaspy 1.22 rain after steady ir. Big incr. @ 4, 8, 12” 1.71rain + ir. to 12” “working”@16” “Lazy” at 20” Faulty 24” Temp sensor Upper 12” takes over Refilled to 44” Gravimetrics very dry

  22. Capacitance Probe Summary • Cost: ~$2,500 per unit (~$20 / Acre) • User friendly information interface; Producers who used it quickly became reliant upon it. • Helped improve Water Use Efficiency • Helped producers increase Profitability Goals • Potential NRCS Support

  23. Computer Modeled Scheduling http://precision-irrigation.net

  24. Computer Modeled Scheduling Precision Irrigation Management

  25. Computer Modeling Summary • Cost: ~$2-3 per acre • Uses time proven irrigation scheduling techniques • Helpful in pre-season crop water use projections • Prioritize limited water • Develop Crop Water Budgets • Would be beneficial on EVERY ACRE

  26. Crop Water Allocator / Crop Yield Predictor

  27. Nicholas Kenny, P.E. Irrigation Specialist – Agricultural Engineer Amarillo Research and Extension Center 6500 Amarillo Blvd. West Amarillo, TX 79106 806.677.5600 NPKenny@ag.tamu.edu YouTube Channel: NPKTexasAgriLIFE Web Site: http://amarillo.tamu.edu/people/kenny

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