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Robert E. Wolf Associate Professor - Extension Specialist Application Technology

Application Strategies Calibration….Calibration…. Top Farmer Crop Workshop Purdue University July 20, 2009. Robert E. Wolf Associate Professor - Extension Specialist Application Technology. Biological and Agricultural Engineering.

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Robert E. Wolf Associate Professor - Extension Specialist Application Technology

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  1. Application StrategiesCalibration….Calibration…. Top Farmer Crop Workshop Purdue University July 20, 2009 Robert E. Wolf Associate Professor - Extension Specialist Application Technology Biological and Agricultural Engineering

  2. Accurate and efficient applications:Increase Efficacy – Minimize Drift

  3. Calibration!!!! GPA Ensuring that the spray output is what it is supposed to be!

  4. Calibration/Nozzle Selection: • What is the first step? • Use label to select the • application volume • product rate • Choose an appropriate travel speed - MPH • Effective width of application • nozzle spacing • Calculate GPM – Flow rate per nozzle • Select the correct size of nozzle!

  5. Rate Controllers:

  6. Parallel Swathing – light bars:

  7. Auto Steering:

  8. Automatic Boom Height Control UC5

  9. Automatic Boom Section Control

  10. Improving Coverage? 500 microns = 1 125 microns = 64 250 microns = 8

  11. Courtesy of Ken Giles, U of California Davis

  12. Calibration!!!!The next phase! A new concept for applicators! Ensuring that the spray droplet spectrum is what it is supposed to be to maximize efficacy while minimizing drift!

  13. ASABE S-572 Droplet Size Standard

  14. 2009

  15. ASABE Standard >150 Fungicides/Insecticides 151-250 251-350 351-450 Herbicides 451-550 >551 Source: Crop Life – July 2002

  16. Page 4

  17. See Page 182, TeeJet Catalog 50A

  18. Droplet Selection/Calibration: p. 15

  19. www.hypropumps.com

  20. Greenleaf Droplet chart: www.turbodrop.com

  21. What is the ‘Real’ difference ? ……Medium droplet at 225 microns ……Coarse droplet at 300 microns How much heavier? Or is it??? 300 = 1.33 225 1.33 bigger 1.333 = 1.33 * 1.33 * 1.33 = 2.35 2.35 * 100 = 235% heavier

  22. Drift Reduction Additives: • Many available! • Not EPA regulated • Long chain polymers • Soluble powders • 50 - 80% reduction in off-target movement • Not all will work!!!! • Pump shear problems • Effect on the pattern? INTERLOCK ARRAY

  23. Volume Median Diameter (VMD) % less than 210 Microns 15 29 23 14 26 19 14 22 10 29 15 17 51 35 22 13 30 37 36 45 40 psi 40 psi 40 psi 70 psi Percent fines Bob Klein, U of Nebraska

  24. Disclaimer: • Brand names appearing in this presentation are for identification and illustration purposes only. • No endorsement is intended, nor is criticism implied of similar products not mentioned.

  25. For more information contact: rewolf@ksu.edu Thank You www.bae.ksu.edu/faculty/wolf/

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