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1. Sensor-based Nitrogen Management Affects Corn Production and Environmental N FootprintsTo improve air and water quality, nitrogen (N) management in corn production systems should shift from the current N decision support system [maximum return to N (MRTN)], which suggests a single rate N addition, to sensor-based (GreenSeeker) active N management (variable N rate approach). Single rate N recommendations often result in under- and over-N addition and either increase environmental N losses or cause corn yield penalty. Our objectives were to evaluate corn optimum nitrogen N requirement... A. Sadeghpour, O. Guzel, M. Guzel, J. Mcgrath, O. Adeyemi, E. Brevik, S. Koduru |