Turfgrass Epistemology

76:24

S4 E55 Do fewer Poa annua seedheads mean more roots?

Turfgrass Epistemology ·

2026/10/01

This video examines the 1987 study “Root Growth, Seedhead Production, and Quality of Annual Bluegrass as Affected by Mefluidide and a Wetting Agent” by R. J. Cooper, P. R. Henderlong, J. R. Street, and K. J. Karnok, exploring seedhead suppression, root growth, and turf quality in annual bluegrass.#PoaAnnua #RootGrowth #WettingAgents #Turfgrass #GolfCourseManagement #TurfScience 📌 https://www.gofundme.com/f/TurfgrassEpistemology Thank you for being part of this community and for supporting

en

57:24

S4 E54 Can wetting agents suppress Poa Annua seedheads?

Turfgrass Epistemology ·

2026/09/29

This video examines the 1985 study “Annual Bluegrass Growth and Quality as Influenced by Treatments of Growth Retardants” by A. M. Petrovic, R. A. White, and M. K. Bhowmik, including the surprising effects of Aqua Gro on annual bluegrass seedhead production and turf quality.#PoaAnnua #WettingAgents #Turfgrass #GolfCourseManagement #TurfScience 📌 https://www.gofundme.com/f/TurfgrassEpistemology Thank you for being part of this community and for supporting evidence-based turfgrass science. Join

en

71:00

S4 E53 Why do localized dry spots form on golf...

Turfgrass Epistemology ·

2026/09/24

This video examines the 1978 study “Investigation and Treatment of Localized Dry Spots on Sand Golf Greens” by J. F. Wilkinson and R. H. Miller, exploring soil water repellency, wetting agents, coring, and water infiltration in creeping bentgrass greens.#LocalizedDrySpot #WettingAgents #GolfGreens #Turfgrass #SoilScience #TurfScience 📌 https://www.gofundme.com/f/TurfgrassEpistemology Thank you for being part of this community and for supporting evidence-based turfgrass science. Join Turfgrass

en

69:09

S4 E52 Can a wetting agent reduce leaf spot disease...

Turfgrass Epistemology ·

2026/09/22

This video examines the 1977 study “Effect of Management Practices on Thatch Accumulation, Turf Quality, and Leaf Spot Damage in Common Kentucky Bluegrass” by J. J. Murray and F. V. Juska, including the surprising effects of wetting agents on leaf spot, turf quality, and thatch. #WettingAgents #Turfgrass #KentuckyBluegrass #LeafSpot #TurfScience #SoilScience #turfmanagement 📌 https://www.gofundme.com/f/TurfgrassEpistemology Thank you for being part of this community and for supporting

en

100:16

S4 E51 Tinfoil Turfgrass - Can CytoGro + Hydretain...

Turfgrass Epistemology ·

2026/09/10

Can CytoGro + Hydretain really reduce irrigation water use in turfgrass? In this video, I examine the science behind cytokinins, plant growth regulators, and Hydretain to determine whether these products actually improve turfgrass water-use efficiency and drought tolerance—or whether the claims exceed the evidence.#Turfgrass #Hydretain #CytoGro #Irrigation #WaterConservation #TurfScience 📌 https://www.gofundme.com/f/TurfgrassEpistemology Thank you for being part of this community and for

en

135:39

S4 E50 Tinfoil Turfgrass - Does CarbonPro-G Unlock...

Turfgrass Epistemology ·

2026/09/03

Does Mirimichi Green CarbonPro-G really “unlock” nutrients—or could some of the turf response come from nutrients already in the product? In this commentary, we examine the CarbonPro-G marketing claims, product label, and what turf managers should consider when evaluating soil amendments.#CarbonProG #LESCO #Turfgrass #SoilAmendments #TurfManagement #GolfCourseManagement 📌 https://www.gofundme.com/f/TurfgrassEpistemology Thank you for being part of this community and for supporting evidence-based

en

57:27

S4 E49 Where Do Wetting Agents Go in Soil?

Turfgrass Epistemology ·

2026/09/01

Where do wetting agents actually go after they enter the soil? This video explores the 1975 study “Movement of Two Nonionic Surfactants in Wettable and Water-Repellent Soils” by R. H. Miller, N. Valoras, and J. Letey, examining surfactant movement, adsorption, retention, and leaching in soils.#WettingAgents #Surfactants #Turfgrass #SoilScience #WaterRepellentSoil #GolfCourseManagement #TurfScience 📌 https://www.gofundme.com/f/TurfgrassEpistemology Thank you for being part of this community and for

en

81:19

S4 E48 Can Surfactants Harm Turfgrass?

Turfgrass Epistemology ·

2026/08/27

Can surfactants harm turfgrass roots and reduce plant growth? This video examines the science from “Effects of Nonionic Surfactants on Monocots” by R. M. Endo, J. Letey, N. Valoras, and J. F. Osborn (1969), published in Agronomy Journal, exploring what this classic research actually found about wetting agents, surfactant phytotoxicity, root growth, root hairs, shoot growth, and the important differences between surfactant effects in solution and soil.#Turfgrass #WettingAgents #Surfactants

en

45:09

S4 E47 Wetting Agents, Soil Oxygen, and Roots.

Turfgrass Epistemology ·

2026/08/25

Can low oxygen in the soil stop turfgrass roots from growing deeper? This video examines the science from “Physical Soil Amendments, Soil Compaction, Irrigation, and Wetting Agents in Turfgrass Management III. Effects on Oxygen Diffusion Rate and Root Growth” by J. Letey, W. C. Morgan, S. J. Richards, and N. Valoras (1966), exploring what this classic turfgrass research actually found about soil oxygen, compaction, irrigation, and root growth.#Turfgrass #SoilOxygen #RootGrowth #SoilScience

en

109:34

S4 E46 Does Hydretain Really Reduce Watering by 50%...

Turfgrass Epistemology ·

2026/08/20

Can Hydretain reduce irrigation while maintaining healthy turf? We examine the 2026 study by I. Alejandra Sierra Augustinus, J. Bryan Unruh, Kevin Kenworthy, Alex J. Lindsey & Marco Schiavon, “St. Augustinegrass can sustain performance under water and fertilizer restrictions in subtropical environments,” and what the research found about Hydretain, irrigation reduction, and St. Augustinegrass performance.#Hydretain #StAugustinegrass #Irrigation #Turfgrass #LawnCare #TurfScience

en

81:14

S4 E45 Wetting agents, turfgrass growth, and soil...

Turfgrass Epistemology ·

2026/08/18

Do wetting agents affect turfgrass growth and soil salinity? This video examines the science from “Physical Soil Amendments, Soil Compaction, Irrigation, and Wetting Agents in Turfgrass Management II. Effects on Top Growth, Salinity, and Minerals in the Tissue” by N. Valoras, W. C. Morgan, and J. Letey (1966), exploring what this classic turfgrass research actually found about wetting agents, irrigation, salinity, and turf growth. #Turfgrass #WettingAgents #SoilScience #LawnCare #TurfScience 📌

en

52:29

S4 E44 When Do Wetting Agents Improve Infiltration?

Turfgrass Epistemology ·

2026/08/11

Do wetting agents always help water move into soil? We revisit the classic 1962 study The Effect of Wetting Agents on Infiltration by R. E. Pelishek, J. Osborn, and J. Letey, which found that wetting agents improved infiltration in hydrophobic soils but could have little or even adverse effects in soils that were not strongly water repellent.#WettingAgents #Turfgrass #SoilScience #WaterRepellency #GolfCourseManagement #TurfScience #Agronomy 📌 https://www.gofundme.com/f/TurfgrassEpistemology Thank

en

130:37

S4 E43 More Turfgrass Questions Answered: Soil...

Turfgrass Epistemology ·

2026/08/06

In Part 2 of my Turfgrass Q&A series, I answer more of your YouTube comments and emails on topics including soil testing, heat stress, nitrogen management, and other common turfgrass questions. Every answer is backed by peer-reviewed research to help separate fact from fiction and improve your turf management decisions.#Turfgrass #LawnCare #GolfCourseManagement #SoilScience #Nitrogen #Agronomy #TurfScience #GolfSuperintendent #LawnTips #QandA #Grass #Science 📌

en

139:55

S4 E42 Answering Your Turfgrass Questions + Tinfoil...

Turfgrass Epistemology ·

2026/08/04

Have questions about urea fertilizer, coated nitrogen, university research, or real-world turf management? In this first Q&A episode, I respond to your YouTube comments and emails using peer-reviewed turfgrass research to separate evidence from opinion and help you make better management decisions.#Turfgrass #LawnCare #GolfCourseManagement #Nitrogen #Urea #Fertilizer #Agronomy #TurfScience #SoilScience #GolfSuperintendent #LawnTips #QandA 📌

en

104:59

S4 E41 Tinfoil Turfgrass - Urea is a Problem...and...

Turfgrass Epistemology ·

2026/07/30

Is it really time to stop using urea fertilizer? In this Tinfoil Turfgrass, I review the claims made in a popular YouTube video and compare them with peer-reviewed turfgrass research to separate evidence from misinformation. Discover what the science actually says about urea, nitrogen fertilizers, volatilization, and best management practices for healthy turf.#Urea #LawnCare #Turfgrass #Nitrogen #Fertilizer #GolfCourseManagement #TurfScience #FactCheck #Agronomy #lawncaretips 📌

en

64:24

S4 E40 Wetter Water?

Turfgrass Epistemology ·

2026/07/28

Can water really become "wetter"? In this video, we explore the classic paper Soil Wetting Agents by Robert A. Moore (1959) and explain how wetting agents improve water infiltration, root development, and turfgrass performance. Discover why this pioneering research still influences modern turf management today.Paper: Soil Wetting Agents Author: Robert A. Moore Year: 1959 #Turfgrass #WettingAgents #SoilScience #GolfCourseManagement #Agronomy #TurfManagement #GolfCourse #WaterManagement

en

69:04

S4 E39 When Were Wetting Agents First Used for...

Turfgrass Epistemology ·

2026/07/22

Can wetting agents improve water movement in golf course turf? In this video, we explore the classic paper "Turfgrass Improvement with a New Water" by Robert A. Moore (1957) and examine how wetting agents help water penetrate the soil, reduce localized dry spots, and promote healthier turfgrass. Discover why this pioneering research continues to influence modern golf course management and turfgrass science. Paper: Turfgrass Improvement with a New Water Author: Robert A. Moore Year: 1957 #Turfgrass

en

58:44

S4 E38 Did Your Brain Decide Before You Did?

Turfgrass Epistemology ·

2026/07/16

Did your brain make your decision before you became aware of it? In this video, we explore the groundbreaking neuroscience study that found brain activity can predict a person's choice seconds before conscious awareness, and what it means for free will. Paper: Unconscious Determinants of Free Decisions in the Human Brain (2008) Authors: Chun Siong Soon, Marcel Brass, Hans-Jochen Heinze, and John-Dylan Haynes #FreeWill #Neuroscience #BrainScience #DecisionMaking #Psychology #CognitiveScience

en

53:52

S4 E37 Your Brain Decided Before You Knew

Turfgrass Epistemology ·

2026/07/14

Did Benjamin Libet's famous 1983 experiment prove that your brain decides before you do? In this episode, we examine Libet, Gleason, Wright, & Pearl (1983), "Time of Conscious Intention to Act in Relation to Onset of Cerebral Activity (Readiness-Potential): The Unconscious Initiation of a Freely Voluntary Act." We'll explain the readiness potential, what the study actually found, common misconceptions, and what it does—and does not—tell us about free will, consciousness, and human

en

75:00

S4 E36 Appeal to Authority: Why Smart People Make Bad...

Turfgrass Epistemology ·

2026/07/09

In this episode of Turfgrass Epistemology, we examine Stanley Milgram's classic paper, Behavioral Study of Obedience (1963), and explore how authority influences our beliefs and decisions. Why do turf managers, consultants, and consumers often accept claims because a professor, university, or industry expert said them? Learn how the logical fallacy of Appeal to Authority can lead us to substitute credentials for evidence—and why scientific claims should be evaluated by data, not status. Paper

en

All Episodes

Similar Podcasts

Les dents et dodo

BFMTV

Daily Facts

Amalia Dupray and Montgomery Jones.

Education Futures

Svenia Busson & Laurent Jolie

Out In The Hall

NHSA

Reading Teachers Lounge

Shannon Betts and Mary Saghafi