Proactive vs. Reactive Tissue Sampling

January 2024 | 21 min., 51 sec.
by Trenton Roberts
University of Arkansas

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​The limitations of proactive sampling are discussed in terms of interpretation, correction, and economics, and data are reviewed for soybean and corn. For proactive sampling to be useful, growers need dynamic critical concentrations, calibrated in-season corrective rates, and economical outcomes.

About the Presenter

Trenton RobertsTrenton Roberts is a professor of soil fertility/soil testing at the University of Arkansas. His research focuses on investigation of soil-based nitrogen tests for fertilizer management in crop production; modeling crop response to nitrogen fertilizer application to determine economic optimum nitrogen rates for crop production; development of better management strategies for crop production through the investigation of the nitrogen balance; and stable isotopes as tracers in terrestrial systems. He has a PhD in soil science from the University of Arkansas, an MS in social science from the University of Arizona, and a BS in plant science from Oklahoma State University.

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