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University of Illinois researchers put hyperspectral sensors on planes to quickly and accurately detect nitrogen status and photosynthetic capacity in corn.

By Harold Watters, Ohio State University Extension Let’s talk again about nitrogen management. It leaks, like everywhere. Up and down — up as a gas when the soils are saturated and down and out with rainfall. Even though 80% of the atmosphere is N, we still have to supply it for our grass crops. And we add more than we need, because we don’t want to be short. If you wonder why I bring this up again, it’s because the survey says — you aren’t listening. So what can we do about managing nitrogen for corn? The current tool to make nitrogen recommendations for corn in Ohio is the CNRC....