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PODCAST

Turfgrass Epistemology

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.

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All Episodes

01:25:09

S3 E36 Dr. Dan Sandor - Irrigation Requirements...

Turfgrass Epistemology ·

2025/07/03

On this episode of Turfgrass Epistemology, Dr. Dan Sandor joins me to break down his study that addresses one of the most commonly misunderstood aspects of turf establishment: how much water should you really apply when seeding a new lawn?Sandor et al. (2021) evaluated daily irrigation at 50%, 75%, 100%, and 125% reference evapotranspiration (ETo) to determine how quickly tall fescue and bermudagrass cultivars reach full coverage. The big takeaway? Applying more than 100% didn’t help, and

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53:29

S3 E35 Which Turfgrass Uses the Least Water?...

Turfgrass Epistemology ·

2025/06/24

In this episode of Turfgrass Epistemology, we dive into a study from Oregon State University that looked at how turfgrass species and mowing height affect water requirements in western Oregon. The results might surprise you—tall fescue and perennial ryegrass significantly outperformed fine fescues when it came to conserving water.We’ll break down the data on evapotranspiration replacement, irrigation intervals, and how mowing height can influence your watering schedule. Should you mow higher

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01:37:09

S3 E34 Comments and Emails. June 2025. Part 2.

Turfgrass Epistemology ·

2025/06/20

In this episode, I dive into the comment section and my inbox to respond to the most interesting, insightful, and downright puzzling messages I’ve received from viewers. From soil test questions and fertilizer theories to passionate turf debates and a few questionable product claims—nothing is off limits.Whether you're here to learn, laugh, or just see if your message made the cut, this video is a behind-the-scenes look at the community that makes Turfgrass Epistemology what it is. Let’s talk turf,

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01:05:29

S3 E33 Comments and Emails. June 2025. Part 1.

Turfgrass Epistemology ·

2025/06/17

In this episode, I dive into the comment section and my inbox to respond to the most interesting, insightful, and downright puzzling messages I’ve received from viewers. From soil test questions and fertilizer theories to passionate turf debates and a few questionable product claims—nothing is off limits.Whether you're here to learn, laugh, or just see if your message made the cut, this video is a behind-the-scenes look at the community that makes Turfgrass Epistemology what it is. Let’s talk turf,

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01:41:44

S3 E32 Tinfoil Turfgrass: Debunking Summer Lawn Care...

Turfgrass Epistemology ·

2025/06/12

In this video, I critically examine the advice presented in "How to Fertilize in Hot Weather. Dog urine spot prevention, fungus recovery, general fertilizer." While the original video offers practical tips on lawn care during hot weather, it's essential to scrutinize the recommendations to ensure they align with best practices and scientific understanding.Key Points Discussed: - Fertilizing in High Temperatures: Assessing the risks and benefits of applying fertilizer during peak heat and its impact

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59:04

Drought Testing. Which Grass Uses the Least Water?

Turfgrass Epistemology ·

2025/06/10

In this episode of Turfgrass Epistemology, we analyze a pivotal field study that tested the drought resistance and irrigation needs of five common turfgrass species under real-world conditions in northern Texas. Using a unique linear gradient irrigation system, Qian and Engelke evaluated how ‘Tifway’ bermudagrass, ‘Meyer’ zoysiagrass, ‘Rebel II’ tall fescue, ‘Prairie’ buffalograss, and ‘Nortam’ St. Augustinegrass performed under a wide range of watering regimes—from excess irrigation to complete

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01:24:12

S3 E30 Tinfoil Turfgrass: University Study Misused?...

Turfgrass Epistemology ·

2025/06/05

He flashes university research to sell Air 8—but is it the whole story? In this video, I break down the science he didn’t show you. Liquid aeration sounds impressive, but does the data actually support the hype? Let’s dig into what the university study really says—and what he conveniently left out. If you're serious about turfgrass and tired of marketing spin dressed up as science, this one's for you.Join Turfgrass Epistemology to get access to

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01:01:29

S3 E29 Which Grass Survives Water Restrictions?

Turfgrass Epistemology ·

2025/06/04

Which Grass Survives Water Restrictions? Science Has the Answer.On this episode of Turfgrass Epistemology, we dive into a long-term study that puts warm-season turfgrasses to the test under real-world municipal water restrictions. Which species held up best when irrigation was limited to once or twice a week? How do turf quality, coverage, and drought resilience stack up over time? Join me as we examine what the science actually says—not the marketing claims—about how Zoysia, Bermuda, and other

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01:19:19

S3 E28 Is Liquid Aeration a Scam?

Turfgrass Epistemology ·

2025/05/29

You've seen the ads: "Liquid aeration breaks up soil compaction—no plugs, no mess!" But does it really work? This video dives into a new peer-reviewed study that compares liquid aeration products (humic acids, seaweed, fertilizer blends) with mechanical hollow-tine cultivation on hybrid bermudagrass fairways.The results are eye-opening. ✅ Did liquid aeration improve turf health? ✅ Can it reduce compaction like traditional aerification? ✅ What really increases water infiltration and rooting? Whether

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01:24:24

S3 E27 Tinfoil Turfgrass - How to Apply Iron from...

Turfgrass Epistemology ·

2025/05/22

Is "fast green" always the right goal? In this episode, I critique the video [How to Get a GREEN LAWN FAST] and unpack the science behind the three quick tips it promotes. Are these practices sustainable—or just shortcuts with hidden consequences? Join me as we separate turfgrass fact from flashy fiction.Join Turfgrass Epistemology to get access to perks: https://www.youtube.com/channel/UC-UZnHkJhAmARDZ4YoHnc_A/join Voicemail: 859-444-4234 Apple

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01:01:16

S3 E26 Tall Fescue Response to Irrigation Intervals

Turfgrass Epistemology ·

2025/05/21

Discover how tall and hard fescue respond to water stress in this deep dive into the science of deficit irrigation. In this episode, we explore a peer-reviewed study that reveals how reduced water inputs affect turf performance, rooting, and drought resilience. If you're managing turf in a water-limited environment, this research has critical insights you don't want to miss.article: https://acsess.onlinelibrary.wiley.com/doi/abs/10.2135/cropsci1989.0011183X002900060045x 👍 Like & Subscribe for

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01:12:44

S3 E24 Irrigation Frequency on Bentgrass Rooting

Turfgrass Epistemology ·

2025/05/15

In this episode of Turfgrass Epistemology, I provide commentary on the scientific article "Effect of Irrigation Frequency on Turf Quality, Shoot Density, and Root Length Density of Five Bentgrass Cultivars." We examine how irrigation intervals influence turfgrass performance, with a focus on shoot density and root development. I discuss the experimental design, key findings, and what this research means for managing bentgrass under varying irrigation regimes. If you're interested in evidence-based

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55:59

S3 E24 Irrigation Frequency on Zoysiagrass Rooting

Turfgrass Epistemology ·

2025/05/13

In this episode of Turfgrass Epistemology, I provide commentary on the scientific article "Irrigation frequency effects on Prizm zoysiagrass establishment from sprigs." We examine how different irrigation intervals influenced establishment speed, coverage, and quality during early growth. I break down the study’s design, highlight the key findings, and discuss how the results apply to real-world turf management decisions—especially for professionals establishing zoysiagrass from sprigs.article:

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02:02:34

S3 E23 AI Answers Every Turf Question. But Is It...

Turfgrass Epistemology ·

2025/05/08

In this episode of Turfgrass Epistemology, we put artificial intelligence to the test by asking it turfgrass management questions—fertility, irrigation, mowing, and more. Can AI provide sound, evidence-based answers, or does it fall into common misconceptions? As a soil scientist, I evaluate its responses and reveal what the science actually says.Join Turfgrass Epistemology to get access to perks: https://www.youtube.com/channel/UC-UZnHkJhAmARDZ4YoHnc_A/join Voicemail: 859-444-4234 Apple

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01:15:09

S3 E22 St. Augustinegrass Response to Irrigation...

Turfgrass Epistemology ·

2025/05/06

In this episode of Turfgrass Epistemology, I review the scientific article "Physiological Response of St. Augustinegrass to Irrigation Scheduling." We explore how different irrigation strategies impact turf health, drought stress, and water use efficiency. As a soil scientist, I break down the study’s methods and findings to understand what truly benefits St. Augustinegrass under varying moisture conditions.article:

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01:19:35

S3 E21 Dr. Matteo Serena - Optimizing Irrigation...

Turfgrass Epistemology ·

2025/05/01

In this episode of Turfgrass Epistemology, I sit down with Dr. Matteo Serena to discuss his paper, "Optimizing Frequency and Amount of Irrigation Needed to Establish Cool-Season Turfgrasses." We explore the key findings, practical applications, and how this research can improve turfgrass establishment strategies. Join us for a deep dive into the science behind efficient irrigation and better turf management.Join Turfgrass Epistemology to get access to

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02:05:46

S3 E20 Comments and Emails. April 2025.

Turfgrass Epistemology ·

2025/04/29

On this episode of Turfgrass Epistemology, I discuss some of the recent comments, emails, and Twitter conversations related to turfgrass science. From thoughtful questions to common misconceptions, I highlight the importance of critical thinking and scientific evidence when evaluating turf management practices. Join me as we explore how public discussions shape what we know—and how we can sharpen our understanding of turfgrass through better communication.👍 Like & Subscribe for more turfgrass

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01:21:40

S3 E19 Water Movement In Soils

Turfgrass Epistemology ·

2025/04/24

Join me, a soil scientist, as I delve into the classic educational film "Water Movement In Soils" (https://youtu.be/DmTNFIEc2VA). This video, produced by Washington State University in 1959, provides a foundational understanding of how water moves through different soil types, highlighting the roles of soil texture, structure, and layering.YouTube In my commentary, I explore key concepts such as capillary action, infiltration, and percolation, and discuss how these processes affect soil health and

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01:06:52

S3 E18 Do Irrigation Intervals Affect Turfgrass Rooting?

Turfgrass Epistemology ·

2025/04/22

In this video, we delve into the 1985 study by Peacock and Dudeck, titled "Effect of Irrigation Interval on St. Augustinegrass Rooting," published in the Agronomy Journal. The research examines how varying irrigation intervals—every 2, 3, 4, or 6 days—impact the root mass and length density of St. Augustinegrass. Interestingly, the study found that root development remained unaffected across these intervals, suggesting that less frequent irrigation may not compromise root growth. These findings have

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01:03:04

S3 E17 Soil CO2 Tests for Bentgrass Putting Greens.

Turfgrass Epistemology ·

2025/04/03

In this video, I break down the science behind the article “Short-term soil carbon mineralization on golf course sand-based putting green and its effect on creeping bentgrass nitrogen uptake.” What does this research tell us about nitrogen cycling, microbial activity, and nutrient availability in high-performance turf systems? Let’s dive into the data and talk implications for turfgrass management.📢 Watch, learn, and share your thoughts in the comments! Zhou, Q., Soldat, D. J., & Ruark, M. D

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238 results

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