1. NTech GreenSeeker RT200 Feasibility
Precision Agriculture
BAE 4213
Levi Johnson

2. 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 square feet.

3. Resolution Issues
RT200 Resolution
RT500 Resolution

4. 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.

5. Lag Time from NDVI to Application Rate
RT200 NDVI
NDVI Based Application Rate

6. RT200 Control Response
NDVI Based Application Rate
Actual Applied Rate

7. RT200 Statistics (Dague Field)
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)

8. 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.

9. References
NTech, INC.
Many hours setting in the seat of the Spray Coupe.

10. Questions