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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.

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Oct 18, 2019

“What We Talk about When We Talk about Soil Health” with Dr. Ryan Stewart.

Soil health is an important topic for today’s scientists, but how do we quantify it, and when we talk about “healthy soils,” what do we even mean?

Dr. Ryan Stewart and his team set out to answer just that. Doing a meta-analysis on dozens of studies listed in The Soil Health Institute’s Research Landscape Tool, Ryan and his team compared different soil health indicators to determine what scientists are measuring, how they’re measuring it, and which are the most valuable in actually determining soil health.

Join us to learn:

  • How measuring soil health is similar to measuring health in humans
  • What kinds of soil health indicators scientists measure
  • How these indicators can be grouped and compared across multiple studies
  • Which indicators are the most helpful in measuring soil health

If you would like more information about this topic, this episode’s paper is available here: 

This paper is always freely available.

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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 would like to reach out to Ryan, you can find him here:


CEU Quiz: 

Agricultural & Environmental Letters Journal

Soil Health Calculator:

Virginia Tech Soil Health Website:

NRCS fact sheets:

Soil Health Institute:

Soil Health Institute Research Landscape Tool:

Soil Health Institute Conferences and Meetings:

Soil Health Institute Soil Health Indicators:


SARE Cover Crops Economic Bulletin:

USDA Soil Health Indicators:

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