Rephonic
Artwork for Turfgrass Epistemology

Turfgrass Epistemology

Travis Shaddox
Soil Testing
Base Cation Saturation
Turfgrass Science
Turfgrass Management
Soil Ph
Turfgrass
Turf Management
Magnesium
Thatch Accumulation
Nitrogen Sources
Nutrient Availability
Calcium To Magnesium Ratios
Soil Nutrients
Calcium
Bermudagrass
Phosphorus
Soil Analysis
Environmental Impact Of Fertilizers
Dr. William Albrecht
Overseeding

This podcast explores how we know what we know about turfgrass science. If you are a lawn care operator, sport field manager, sod producer, golf superintendent, or a home owner, this podcast provides evidence-based information to help you better manage your turfgrass.

PublishesDailyEpisodes267Founded2 years ago
Number of ListenersCategories
ScienceEducationEarth Sciences

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Artwork for Turfgrass Epistemology

Latest Episodes

In this video, I break down a Floratine Masterclass where Tim Cartwright discusses a common claim about calcium availability in soils. I examine the argument, the science behind calcium in turfgrass soils, and whether the explanation actually aligns ... more

In this video, I break down the research article “Soil Amendments and Fertilizer Source Effects on Creeping Bentgrass Establishment, Soil Microbial Activity, Thatch, and Disease.” We examine whether organic fertilizers, poultry meal, and humate soil ... more

In this video, I review the classic turfgrass study “Dollar Spot Severity, Tissue Nitrogen, and Soil Microbial Activity in Bentgrass as Influenced by Nitrogen Source.” We take a close look at whether organic fertilizers really suppress dollar spot an... more

In this video, I review the research article “Strategies for Increasing Ferrous Sulfate Efficacy Against Dollar Spot of Creeping Bentgrass.” We examine how ferrous sulfate (FeSO₄) can suppress dollar spot, how application techniques affect performanc... more

Key Facts

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Recent Guests

Dr. John Inguagiato
Associate Professor of Turfgrass Pathology at the University of Connecticut
University of Connecticut
Episode: S3 E66 Dr. John Inguagiato. Can Phosphite Reduce Algae?
Dr. Lee Miller
Director of research and extension programs focused on disease control in turf grasses at Purdue University
Purdue University
Episode: S3 E62 Dr. Lee Miller - Turf Fungicide Resistance?
Dr. Shaddix
Episode: S3 E56 University Extension Programs
Dr. Matteo Serena
Senior Manager for Irrigation Research and Services at the USGA
United States Golf Association
Episode: S3 E21 Dr. Matteo Serena - Optimizing Irrigation Frequency Needed to Establish Cool-Season Turfgrasses
Dr. Serena
Turfgrass Water Specialist
Episode: S3 E20 Comments and Emails. April 2025.
Dr. John Dempsey
An expert in turfgrass science and research
Episode: S2 E96 Dr. John Dempsey - Potassium Phosphite Translocation in Turfgrass
Dr. Bill Kreuser
A turfgrass scientist and professor with expertise in phosphorus management and growth regulators.
Greenkeeper
Episode: S2 E87 Dr. Bill Kreuser - Phosphorus Requirements for Creeping Bentgrass Putting Greens
Chris Borgman
CEO at Predictive Nutrient Solutions
Predictive Nutrient Solutions
Episode: S2 E75 More soil testing, more BS!
Matt Williams
Director of R&D at Predictive Nutrient Solutions
Predictive Nutrient Solutions
Episode: S2 E75 More soil testing, more BS!

Host

Travis Shaddix
Host with Turfgrass Epistemology background; appears across numerous episodes emphasizing evidence-based turfgrass science and critique of marketing claims.

Reviews

4.9 out of 5 stars from 38 ratings
  • Informative and entertaining

    We need more Tinfoil Turfgrass episodes! Keep up the good work!

    Apple Podcasts
    5
    Madison Grassman
    United Statesa year ago
  • Love Shaddox!

    Really enjoy having this podcast queued up. Dr. Shaddox does a great job of sharing his knowledge (especially with a trained monkey like myself) while still holding my attention.

    Apple Podcasts
    5
    Jrpinkerton
    United States2 years ago
  • I want to like this podcast.

    Travis speaks like a true professor. Dull and monotone. His sentences start off normal and then he eventually ends them mumbling in a low voice. Maybe it’s just me, but if there is any background noise I can’t understand half of what he’s saying. Grab a good pair of isolation headphones. You’ll need them.

    Apple Podcasts
    1
    dbstover
    United States2 years ago

Listeners Say

Key themes from listener reviews, highlighting what works and what could be improved about the show.

Thoughtful, rigorous take on turf science that challenges industry hype.
Host explains complex studies clearly for practitioners.
Some audience find the delivery dry or monotone but informative.

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Talking Points

Recent interactions between the hosts and their guests.

S4 E10 Irrigation Influence on Disease and Weeds.
Q: Travis, have you posted a video on any research involving turfgrass processing, fertilizer or weed control while an insecticide has been applied at the same time?
The commenter raised a concern about certain insecticides potentially interfering with turfgrass processing of herbicides, which Travis later confirmed with an expert.
S4 E4 Iron Sulfate and Dollar Spot
Q: Would this apply for iron EDDHA?
No, iron EDDHA does not seem to have the same toxic effect on the disease as iron sulfate does.
S3 E66 Dr. John Inguagiato. Can Phosphite Reduce Algae?
Q: Can phosphites be used curatively?
Phosphites can be effective curatively, but preventive applications are usually recommended for better results.
S3 E62 Dr. Lee Miller - Turf Fungicide Resistance?
Q: Can the repeated use of Azoxystrobin actually lead to worse dollar spot or leaf spot than if no fungicide had ever been used at all?
No, there is no research indicating that using Azoxystrobin makes it worse, although it does not control dollar spot.
S3 E62 Dr. Lee Miller - Turf Fungicide Resistance?
Q: What is fungicide resistance and how does someone differentiate between resistance and an application error?
Fungicide resistance is a stable change of the pathogen allowing it to overcome fungicide effectiveness. It can be distinguished from application errors by continuous failure of the fungicide despite repeated applications.

Audience Metrics

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Listeners per Episode
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Frequently Asked Questions About Turfgrass Epistemology

What is Turfgrass Epistemology about and what kind of topics does it cover?

This show centers on evidence-based turfgrass science, focusing on practical management for golf course greens, sod production, sports fields, and lawn care. Topics span disease control (dollar spot, red thread, brown patch), nutrient and irrigation strategies, dew and leaf-wetness management, and critical appraisal of marketing claims in the turf industry. A recurring strength is rigorous scrutiny of published studies, with host-led explanations, real-world anecdotes, and a willingness to challenge sales-heavy messaging. The format tends to appeal to turf managers, extension-minded professionals, and informed homeowners who value data-driven decisions and transparent discussion of methodology and limitations.

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How many listeners does Turfgrass Epistemology get?

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Which podcasts are similar to Turfgrass Epistemology?

These podcasts share a similar audience with Turfgrass Epistemology:

1. The ATC Doublecut with Micah Woods
2. Cornell Turfgrass Turf Show Podcast
3. TurfNet Podcasts
4. Turf Today
5. No Laying Up - Golf Podcast

How many episodes of Turfgrass Epistemology are there?

Turfgrass Epistemology launched 2 years ago and published 267 episodes to date. You can find more information about this podcast including rankings, audience demographics and engagement in our podcast database.

How do I contact Turfgrass Epistemology?

Our systems regularly scour the web to find email addresses and social media links for this podcast. We scanned the web and collated all of the contact information that we could find in our podcast database. But in the unlikely event that you can't find what you're looking for, our concierge service lets you request our research team to source better contacts for you.

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What guests have appeared on Turfgrass Epistemology?

Recent guests on Turfgrass Epistemology include:

1. Dr. John Inguagiato
2. Dr. Lee Miller
3. Dr. Shaddix
4. Dr. Matteo Serena
5. Dr. Serena
6. Dr. John Dempsey
7. Dr. Bill Kreuser
8. Chris Borgman

To view more recent guests and their details, simply upgrade your Rephonic account. You'll also get access to a typical guest profile to help you decide if the show is worth pitching.

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