After more than fifty years, the goal of improving direct nitrogen gains in crops remains challenging. A new conceptual framework that links soil and plant processes is necessary for effective crop improvement and environmental stewardship. In this Comment, Ciampitti et al. present a relevant conceptual framework that goes beyond yield-based indirect progress to unravel the true gains of nitrogen in field crops.
More than a half-century after the initial conceptualization of nitrogen use efficiency, crop improvement progress for direct nitrogen gains remains an elusive target. A more relevant conceptual framework bridging soil and plant processes is needed for crop improvement and environmental stewardship. In this Comment, Ciampitti et al. introduces a more relevant conceptual framework bridging soil and plant processes to untangle true gains of N for field crops rather than indirect progress merely based on yield.
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