Transcript GreenSeeker RT200 - Oklahoma State University–Stillwater

NTech GreenSeeker
RT200 Feasibility
Precision Agriculture
BAE 4213
Levi Johnson
What is the GreenSeeker RT200?
Zone Managing Variable Rate Nitrogen
Applicator.
Uses GeenSeeker Sensors averaged
together to produce a mean NDVI for the
particular zone.
Controls the application rate of existing
control systems.
Resolution of approx. 4000 square feet.
Resolution Issues
RT200 Resolution
RT500 Resolution
Pros and Cons
Advantages
• Low cost compared to
GreenSeeker RT500
• Uses the already
existing boom
• Fewer sensors and
cables
Disadvantages
• Poor Resolution
compared to RT500
• Large Lag Time in
Controller Response
approx 4.0 sec = 60 ft
• Applies fertilizer
based on previous
zone readings.
Lag Time from NDVI to
Application Rate
RT200 NDVI
NDVI Based Application Rate
RT200 Control Response
NDVI Based Application Rate
Actual Applied Rate
RT200 Statistics
(Dague Field)
RT200
• Average NDVI = .375
• Average NDVI
readings if sensor
placement is shifted 2
feet down the boom
.416, .433, .415, .413
RT500
• Average NDVI = .419
(average of entire
field)
Conclusions
• GreenSeeker RT200 has its place in
Precision Agricultural mainly due to the
low risk associated with this from of
variable rate nitrogen application.
• This system is still able to address the
issue of temporal variability, but spatial
variability is being buffered due to lack of
resolution proper control.
References
• NTech, INC.
• Many hours setting in the seat of the
Spray Coupe.
Questions