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) 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.

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