Kent Martin employs our new shaft encoding GreenSeeker sensor combined with Sonar for height that allows for by-plant measurements in corn (variable rate technology).  These results are being applied within the Nitrogen Fertilization Optimization Algorithm (NFOA) that is being tested in corn this spring in Oklahoma, Nebraska, and Iowa.

The relationship between INSEY and grain yield using 3 different approaches where predicted yield that can be achieved with added N fertilization is; a) yield potential multiplied times the response index, b) maximum yield can be achieved regardless of the response index (generally low CV's), and c) yield potential multiplied times the response index but as a function of CV.

The NEW GreenSeeeker Variable rate applicator for corn and sorghum was completed on August 19, 2003,  This is a modification of the version below whereby the valves and nozzles are all assembled on a shaft that travels just above the ground.  Skids and a retractable arm allow for operator error.