ramps in 2006-07 sbnm in-service training stillwater, ok january 18-19, 2007
TRANSCRIPT
RAMPs in 2006-07
SBNM In-Service TrainingStillwater, OKJanuary 18-19, 2007
2006-07 Ramp Program
586 farmer’s fields have had Ramp Calibration Strips placed in them
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.
RCS Applicator Components
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.
Nozzle Control
RCS Starts
RCS Ends
GPM flow rates are for 28% fertilizer solution.
Each step lasts approximately 10 feet.
SJ3-01 SJ3-02 SJ3-04 SJ3-08 GPM lbsN/acON ON ON ON 1.33 200
ON ON ON 1.24 187ON ON ON 1.15 173
ON ON 1.06 160ON ON ON 0.97 147
ON ON 0.88 133ON ON 0.80 120
ON 0.71 107ON ON ON 0.62 93
ON ON 0.53 80ON ON 0.44 67
ON 0.35 53ON ON 0.27 40
ON 0.18 27ON 0.09 13
0.00 0ON ON ON ON 1.33 200
Standard Industry ComponentsCan we build a ramp applicator with these?
Potential Road Blocks
Flow Limitations Orifice metering is pressure limited Quadruple the pressure to double the
flow
Potential Solutions VariTargetTM Nozzles Synchro PWM Variable Rate TurboDrop®
VariTargetTM Nozzle
Variable
Orifice
VariTargetTM Nozzle - Operation
VeriTargetTM Flow Data
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
0 20 40 60 80 100 120
Pressure, psi
No
zzle
Flo
w,
GP
M
Mfg. DataStudent 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.
VeriTargetTM Nozzle Flow
0.0
0.2
0.4
0.6
0.8
1.0
1.2
20 30 40 50 60 70 80
Pressure, psi
No
zzle
Flo
w,
GP
M
Flow data from three individual VeriTargetTM nozzles collected by OSU BAE students.
Should be released soon.
Double the pressure, double the flow rate.
Synchro Nozzles
Independent Flow Control (1-8X)
Independent Drop Size Control
Synchro Controller Components
How it Works Uses high speed
solenoid valves to regulate flow
Varies application rate with duty cycle, independent of pressure
What is Pulse Width? Type of control system Modulates a DC square wave signal
Spatial Information
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
Estimating Canopy Closure
0.00
0.10
0.20
0.30
0.40
0.50
0.60
0.70
0.80
40 60 80 100 120
Days After Planting
ND
VI
0%
10%
20%
30%
40%
50%
60%
70%
80%
Over RowRow MiddleRatio
0.00
0.10
0.20
0.30
0.40
0.50
0.60
0.70
0.80
40 60 80 100 120
Days After Planting
ND
VI
120 lbsN/ac [OR]
80 lbsN/ac [OR]
120 lbsN/ac [BR]
80 lbsN/ac [BR]
NDVI by Initial N Applied
Significant Difference
Ramp Task List
1. Read ramp strips/Save file2. Process data3. Record information on data sheet4. Mail copy of data sheet to me5. Download saved data files and email
to me
Ramps in 2007
Limited ramps in corn, cotton Some interest in bermuda, grazing Plans for wheat ??
Wrap Up
We need to collect quality data from Ramp Calibration Strips
We need an ‘easier to build’ applicator
Randy Taylor111 Ag HallBiosystems and Agricultural EngineeringOklahoma State UniversityStillwater, OK 74078405-744-5277 voice405-744-6059 [email protected]