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Welcome to the web home for Field, Lab, Earth, the podcast from the American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America. The podcast all about past and present advances in agronomic, crop, soil, and environmental sciences, our show features timely interviews with our authors about research in these fields.

Field, Lab, Earth releases on the third Friday of each month in addition to the occasional bonus episode. If you enjoy our show, please be sure to tell your friends and rate and review. If you have a topic, author, or paper you would like featured or have other feedback, please contact us on Twitter @fieldlabearth or use the email icon below. You can join our newsletter to receive notifications about new episodes and related resources here.

Field, Lab, Earth features graduate and undergraduate students at the end of each episode. If you would like to be featured, please let us know by filling out this brief application form. Please note you must be a student member with ASA, CSSA, or SSSA to apply.

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Jun 3, 2022

There are multiple tools for farmers to work with when deciding Nitrogen recommendation rates. All of them operate on the spectrum between mechanistic and empirical approaches. In this episode of the Field, Lab, Earth podcast, Drs. Brian Arnall, Josh McGrath, and Wade Thomason discuss the key differences between these approaches, how they interact with accuracy and precision, how they intertwine with each other, future research for recommendation tools, and how farmers can best make decisions for their farms. Tune in to learn:

  • What the difference is between accuracy and precision
  • What the difference is between mechanistic and empirical approaches
  • How these approaches interface with Big Data and environmental concerns
  • What factors most impact which approaches farmers use

Contact us at or on Twitter @FieldLabEarth if you have comments, questions, or suggestions for show topics, and if you want more content like this don’t forget to subscribe. If you’d like to see old episodes or sign up for our newsletter, you can do so here:

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OCP North America is a subsidiary of the OCP Group, a leading global plant-nutrition company headquartered in Morocco. Committed to providing long term reliable supply of quality fertilizers and feeding the world sustainably. R&D and Innovation are key drivers in OCP’s efforts to become a world leader in soil health and responsible plant nutrition, working closely with other innovators in food and agricultural research, and creating a more agile and resilient food supply that is safe, widely accessible and climate friendly. For more information on the OCP Group, check out

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Field, Lab, Earth is Copyrighted by the American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America.