Preview Mode Links will not work in preview mode

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.

Thank you for subscribing using the buttons below. For mobile users, the icons, in order, are for Twitter, email, our RSS feed, Apple Podcasts, TuneIn (Alexa), Stitcher, Google Play, Google Podcasts, and Spotify.

Apr 19, 2019

“Color, Transfer, and Application Parameters of Turfgrass Colorants” with Garland (Drew) Pinnix.

In kindergarten, we’re taught that colors can be one of seven colors of the rainbow. Later, we learn fun colors like purple mountain majesty and get excited when our friend brings a 50-pack of crayons. In reality though, color is much more complex, a mixture of hue, brightness, and saturation. Drew Pinnix thinks a lot about color, specifically in relation to turfgrass. Most of the time, the beautiful turfgrass we see at golf courses or football fields is due to careful management by professionals trained in plant science or agronomy. However, sometimes weather or cost restrictions gets in the way, and turfgrass managers look to colorants to get the turfgrass ready for use and for cameras quickly.

However, getting a natural color that won’t rub off as football players slide in after a fumble is incredibly complicated. That’s where Drew’s team comes in. He works to scientifically evaluate turfgrass colorants so football fields and golf courses can keep looking gorgeous year-round. Tune in to learn more about Drew’s experimental design, turfgrass management, and learn answers to the following:

  • What are some reasons that turfgrass managers might use colorants?
  • What is overseeding, and why might it be done intentionally?
  • What is hue angle?
  • What is the difference between hue, saturation, and brightness?
  • Does a colorant work better on wet or dry turf?

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

It will be freely available from 19 April to 3 May, 2019.

If you would like to find transcripts for this episode or sign up for our newsletter, please visit our website:

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 Drew, you can find him here:


CEU Quiz: 

“Air Temperature Effects on Turfgrass Colorant Transfer” paper:

“Leaf Wetness Influences Turf Colorant Application” paper:


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