1. RAMPs in 2006-07 SBNM In-Service Training Stillwater, OK January 18-19, 2007

2. 2006-07 Ramp Program  586 farmer’s fields have had Ramp Calibration Strips placed in them

3. Documenting Impact  Each RCS has an associated contact person who will collect sensor data. complete the data sheet.  We know many of the fields have or will be receiving N soon.

4. RCS Applicator Components

5. We constructed a sprayer with sets of 4 StreamJet nozzles from TeeJet per location. Nozzles are spaced on 24 inch centers. The four nozzles are an 01, 02, 04, and 08. We are using a design pressure of 40 psi.

6. Nozzle Control RCS Starts RCS Ends GPM flow rates are for 28% fertilizer solution. Each step lasts approximately 10 feet.

7. Standard Industry Components Can we build a ramp applicator with these?

8. Potential Road Blocks  Flow Limitations Orifice metering is pressure limited Quadruple the pressure to double the flow  Potential Solutions VariTarget TM Nozzles Synchro PWM Variable Rate TurboDrop ®

9. VariTarget TM Nozzle Variable Orifice

10. VariTarget TM Nozzle - Operation

11. VeriTarget TM Flow Data They claim a 10x flow rate change with a 6.7x pressure change. Data collected by OSU BAE students seem similar to mfg. data.

12. VeriTarget TM Nozzle Flow Flow data from three individual VeriTarget TM nozzles collected by OSU BAE students.

13. Should be released soon. Double the pressure, double the flow rate.

14. Synchro Nozzles  Independent Flow Control (1-8X)  Independent Drop Size Control

15. Synchro Controller Components

16. How it Works  Uses high speed solenoid valves to regulate flow  Varies application rate with duty cycle, independent of pressure

17. What is Pulse Width?  Type of control system  Modulates a DC square wave signal

18. Spatial Information

19. GreenSeeker Data  Measuring NDVI directly over the row with four sensors and between the rows with three sensors  Collected data from research plots and farmers’ fields on multiple dates

20. Estimating Canopy Closure

21. NDVI by Initial N Applied Significant Difference

22. Ramp Task List 1.Read ramp strips/Save file 2.Process data 3.Record information on data sheet 4.Mail copy of data sheet to me 5.Download saved data files and email to me

23. Ramps in 2007  Limited ramps in corn, cotton  Some interest in bermuda, grazing  Plans for wheat ??

24. Wrap Up  We need to collect quality data from Ramp Calibration Strips  We need an ‘easier to build’ applicator Randy Taylor 111 Ag Hall Biosystems and Agricultural Engineering Oklahoma State University Stillwater, OK 74078 405-744-5277 voice 405-744-6059 fax Randy.Taylor@okstate.edu