Calibration STamp Technology for improved mid-season and topdress N applications

Power RI

New Approach to Determining RI's and Temporal Response

The Power Response Index will integrate the area underneath the curve (NDVI as a function of distance). The same RI's can be obtained using lower values and higher values, but the area under the response curve will further characterize response.

N rates will be applied in proportionately increasing rates across a distance of 100 feet. Each foot will represent 1 lb N/ac increase. Mid-season N rates for optimum profit will be the distance where no change in NDVI was detected between it and a higher rate.

Calibration Stamps for Improved Mid-Season Fertilizer N Recommendations in Corn and Wheat Production Systems

Research Article Documenting the Application of the Calibration Stamp:
Automated Calibration Stamp Technology for Improved In-Season Nitrogen Fertilization Agronomy Journal (in press)

Calibration Strip Sprayer (David Zavodny)

Precision Ag Update, CCA 2005 (J. Solie)