Turfgrass Epistemology
Episodes
S2 E5 The soil pH diagram. A review.
11 Jan 2024
Contributed by Lukas
Hartemink, A.E., Barrow, N.J. Soil pH - nutrient relationships: the diagram. Plant Soil 486, 209–215 (2023). Live calls and voice mail: 859-444-4234...
S2 E4 Iron source effect on bentgrass.
11 Jan 2024
Contributed by Lukas
Glinski, D.S., Carrow, R.N. and Karnok, K.J. (1992), Iron Fertilization Effects on Shoot/Root Growth, Water Use, and Drought Stress of Creeping Bentgr...
S2 E3 Iron applied with elemental sulfur.
10 Jan 2024
Contributed by Lukas
Ryan C. Christensen , Bryan G. Hopkins [email protected] , Von D. Jolley , Kelly M. Olson , Christopher M. Haskell , Nicholas J. Chariton & Bruce L....
S2 E2 Granular vs. foliar Fe, Mn, and Mg fertilizers for turfgrass
09 Jan 2024
Contributed by Lukas
Shaddox TW, Unruh JB, Restuccia NG. St. Augustinegrass quality and nutrient content in response to granular and foliar iron, manganese, and magnesium....
S2 E1 How long does iron fertilizer remain soluble in soil?
05 Jan 2024
Contributed by Lukas
Shaddox, T.W., Fu, H., Gardner, D.S., Goss, R.M., Guertal, E.A., Kreuser, W.C., Miller, G.L., Stewart, B.R., Tang, K. and Unruh, J.B. (2019), Solubili...
S1 E62 Live calls and comments!
28 Dec 2023
Contributed by Lukas
I discuss a thatch video claiming to reducing thatch by applying natural organic products, address two comments from an iron video, and talk to caller...
S1 E61 Comments and emails!
21 Dec 2023
Contributed by Lukas
Live calls: 859-444-4234 Calendly.com/TravisShaddox Twitter.com/TravisShaddox
S1 E60 Foliar iron can increase turfgrass growth.
20 Dec 2023
Contributed by Lukas
Cooper, R.J., & Spokas, L.A. 1991. Growth, Quality, and Foliar Iron Concentration of Kentucky Bluegrass Treated with Chelated Iron Sources. Journa...
S1 E59 Granular vs. foliar iron applied to severely Fe-deficient Kentucky Bluegrass
19 Dec 2023
Contributed by Lukas
D.D. Minner and J.D. Butler. 1984. Correcting Iron Deficiency of Kentucky Bluegrass. HortScience. 19:109-110. Calendly.com/TravisShaddox Twitter.com/T...
S1 E58 Chelated iron vs. iron sulfate on Kentucky Bluegrass
15 Dec 2023
Contributed by Lukas
Yust, A.K., Wehner, D.J. and Fermanian, T.W. (1984), Foliar Application of N and Fe to Kentucky Bluegrass1. Agron. J., 76: 934-938. Calendly.com/Tra...
S1 E57 Chelated iron + nitrogen ≠ ’double dark’ turfgrass.
15 Dec 2023
Contributed by Lukas
Carrow, R.N., Johnson, B.J. and Landry, G.W., Jr. (1988), Centipedegrass Response to Foliar Application of Iron and Nitrogen. Agron. J., 80: 746-750. ...
S1 E56 Iron and Manganese and Boron, Oh My!
13 Dec 2023
Contributed by Lukas
Deal, E.E. and Engel, R.E. 1965. Iron, Manganese, Boron and Zinc: Effects on Growth of Merion Kentucky Bluegrass. Agron. J., 57: 553-555. Calendly.com...
S1 E55 Iron for Turfgrasses
12 Dec 2023
Contributed by Lukas
An introduction to iron for turfgrasses. Calendly.com/TravisShaddox Twitter.com/TravisShaddox
S1 E54 Mowing height, nitrogen, and biostimulants effect on bermudagrass thatch.
09 Dec 2023
Contributed by Lukas
Brian J. Tucker, Lambert B. McCarty, Haibo Liu, and Christina E. Wells. 2006. Mowing Height, Nitrogen Rate, and Biostimulant Infuence Root Development...
S1 E53 Biological thatch control in zoysiagrass putting greens.
08 Dec 2023
Contributed by Lukas
Josh R.Weaver, Lambert B. McCarty, Virgil L. Quisenberry, L. Ray Hubbard Jr., William G. Bridges, Philip J. Brown. 2022. Evaluating biological thatch ...
S1 E52 Bacteria and cellulase for thatch control does not work, even in Norway.
06 Dec 2023
Contributed by Lukas
Tatsiana Espevig, Bjørn Molteberg, Anne Marte Tronsmo, Arne Tronsmo, and Trygve S. Aamlid. 2012. Thatch Control in Newly Established Velvet Bentgrass...
S1 E51 Cultural and biological control of bentgrass thatch
05 Dec 2023
Contributed by Lukas
Lambert B. McCarty, Matthew F. Gregg, and Joe E. Toler. 2007. Thatch and Mat Management in an Established Creeping Bentgrass Golf Green. Agron. J. 99:...
S1 50 Dr. Sudeep Sidhu - What is lignin and why is it so resistant to decomposition?
01 Dec 2023
Contributed by Lukas
Sudeep Sidhu, Qingguo Jack Huang, Robert N. Carrow, David Jesperson, Jiayang Liu, Paul L. Raymer. 2022. A review of a novel enzyme system for the mana...
S1 E49 Dr. Paul Raymer - Biodethatching in Bermudagrass and Zoysiagrass.
01 Dec 2023
Contributed by Lukas
Sudeep S. Sidhu, Qingguo Huang, Robert N. Carrow, and Paul L. Raymer. 2013. Efficacy of Fungal Laccase to Facilitate Biodethatching in Bermudagrass an...
S1 E48 Does fertility and cultivation influence thatch on a bermudagrass home lawn?
01 Dec 2023
Contributed by Lukas
R.N. Carrow, B. J. Johnson, and R. E. Burns. 1987. Thatch and Quality of Tifway Bermudagrass Turf in Relation to Fertility and Cultivation. Agron. J. ...
S1 E47 Biological and cultural thatch management on newly seeded bentgrass putting greens.
01 Dec 2023
Contributed by Lukas
Lambert B. McCarty, Matthew F. Gregg, Joe E. Toler, James J. Camberato, and Hoke S. Hill. 2005. Minimizing Thatch and Mat Development in a Newly Seede...
S1 E46 White-rot Fungi Reduces Lignin of Four Turfgrasses
22 Nov 2023
Contributed by Lukas
Sartain, J.B. and B.G. Volk. 1984. Influence of Selected White-Rot Fungi and Topdressings on the Composition of Thatch Components of Four Turfgrasses....
S1 E45 Bugs in a jug.
21 Nov 2023
Contributed by Lukas
Murdoch, C.L. and J.P. Barr. 1976. Ineffectiveness of Commercial Microorganism Inoculum in Breaking Down Thatch in Common Bermudagrass in Hawaii. Hort...
S1 E44 Thatch accumulation following Milorganite, Lime, Verticutting, and Aerification.
20 Nov 2023
Contributed by Lukas
Murray, J.J. and F.V. Juska. 1977. Effect of Management Practices on Thatch Accumulation, Turf Quality, and Leaf Spot Damage in Common Kentucky Bluegr...
S1 E43 Thatch management in a bottle. Is this possible?
20 Nov 2023
Contributed by Lukas
Sidhu, S.S, Q. Huang, R.N. Carrow, and P.L. Raymer. 2012. Use of Fungal Laccases to Facilitate Biodethatching: A New Approach. HortScience 47:1536–1...
S1 E42 Dr. Lee Berndt - Do bio-organic materials hasten thatch decay?
20 Nov 2023
Contributed by Lukas
Berndt, W.L., P.E. Rieke, and J.M. Vargas, Jr. 1990. Kentucky Bluegrass Thatch Characteristics Following Application of Bio-organic Materials. HortSci...
S1 E41 Does Thatch Influence Water Infiltration?
20 Nov 2023
Contributed by Lukas
Taylor, D.H. and G.R. Blake. 1982. The Effect of Turfgrass Thatch on Water Infiltration Rates. Soil Sci . Soc . Am. J. 46:616-619. Calendly.com/Travis...
S1 E40 Can You Control Thatch Using Aerification and Ammonium Sulfate?
20 Nov 2023
Contributed by Lukas
Smith, G.S. 1979. Nitrogen and Aerification Influence on Putting Green Thatch and Soil. Calendly.com/TravisShaddox Twitter.com/TravisShaddox
S1 E39 The Most Accurate Method of Measuring Zoysiagrass Thatch
20 Nov 2023
Contributed by Lukas
Shaddox T.W. and J.B. Unruh. 2019. Correlating Methods of Measuring Zoysiagrass Thatch. Crop Sci. 59:792–799. Calendly.com/TravisShaddox Twitter.com...
S1 E38 The Nature of Turfgrass Thatch
20 Nov 2023
Contributed by Lukas
Ledeboer, F. B. and C. R. Skogley. 1967. Investigations Into the Nature of Thatch and Methods for its Decomposition. Calendly.com/TravisShaddox Twitt...
S1 E37 Logical Fallacies - Ad hominem
20 Nov 2023
Contributed by Lukas
Ad hominem fallacy occurs when you attempt to refute an argument by attacking the person. Ridicule has its place and can be useful in some situations....
S1 E36 Organic vs. synthetic fertilizer in Canada. Which is better?
20 Nov 2023
Contributed by Lukas
Nelson, S. H. 1980. Summer color and fall color retention of Kentucky bluegrass receiving varying amounts and timing of inorganic and inorganic-organi...
S1 E35 Does timing of fall-applied nitrogen differ in Italy?
19 Nov 2023
Contributed by Lukas
Grossi, N., F. Lulli, M. Volterrani, and S. Miele. 2005. Timing of fall nitrogen application on tall fescue turf. Calendly.com/TravisShaddox Twitter.c...
S1 E34 Dr. Cale Bigelow - Turfgrass response to various nitrogen programs in Indiana.
19 Nov 2023
Contributed by Lukas
Walker, K. S., C. A. Bigelow, D. R. Smith, G. E. Van Scoyoc, and Z. J. Reicher. 2007. Aboveground Responses of Cool-Season Lawn Species to Nitrogen Ra...
S1 E33 Is polymer and sulfur-coated urea any better on Kentucky bluegrass than just urea?
19 Nov 2023
Contributed by Lukas
Bigelow, C. A., K. S. Walker, and G. A. Hardebeck. 2007. Single Fall Applications of Coated Urea Fertilizers Produce a High Quality Kentucky Bluegrass...
S1 E32 You don’t get roots, and you don’t get roots! No one gets roots!
19 Nov 2023
Contributed by Lukas
Moore, R. W., N. E. Christians, and M. L. Agnew. 1996. Response of Three Kentucky Bluegrass Cultivars to Sprayable Nitrogen Fertilizer Programs. Calen...
S1 E31 Nitrogen uptake differs even within cultivars of the same species.
19 Nov 2023
Contributed by Lukas
Liu, H. and R. J. Hull. 2006. Comparing cultivars of three cool-season turfgrasses for nitrogen recovery in clippings. Calendly.com/TravisShaddox Twit...
S1 E30 What happens to nitrogen applied to turfgrass in late fall?
19 Nov 2023
Contributed by Lukas
Mangiafico, S. S. and K. Guillard. 2006. Fall Fertilization Timing Effects on Nitrate Leaching and Turfgrass Color and Growth. Calendly.com/TravisShad...
S1 E29 Late Fall Soluble vs. Slow-release Nitrogen on Kentucky Bluegrass Color
19 Nov 2023
Contributed by Lukas
Wehner, D J., J. E. Haley, and D. L. Martin. 1988. Late Fall Fertilization of Kentucky Bluegrass. Calendly.com/TravisShaddox Twitter.com/TravisShaddox...
S1 E28 What to expect from cool-season turfgrasses if temperatures drop fast.
19 Nov 2023
Contributed by Lukas
Rajashekar, C., D. Tao, and P. H. Li. 1983. Freezing Resistance and Cold Acclimation in Turfgrasses. Calendly.com/TravisShaddox Twitter.com/TravisShad...
S1 E27 Does nitrogen deplete carbohydrates in Kentucky bluegrass?
19 Nov 2023
Contributed by Lukas
Watshke and Waddington. 1974. Effect of Nitrogen Source, Rate, and Timing on Growth and Carbohydrates of Merion Bluegrass. Calendly.com/TravisShaddox ...
S1 E26 Dr. Eric Miltner - Late fall and winter nitrogen applied in the pacific northwest.
19 Nov 2023
Contributed by Lukas
Miltner, E.D., G.K. Stahnke, W.J. Johnston, C.T. Golob. 2004. Late fall and winter nitrogen fertilization of turfgrass in two pacific northwest climat...
S1 E25 Nitrogen source, rate, and timing influence cool-season turfgrass quality.
19 Nov 2023
Contributed by Lukas
Ledeboer and Skogley. 1973. Effects of Various Nitrogen Sources, Timing, and Rates on Quality and Growth Rate of Cool-Season Turfgrasses. Calendly.com...
S1 E24 Dr. Doug Soldat - Turfgrass uptake of fall-applied nitrogen.
19 Nov 2023
Contributed by Lukas
Lloyd, D.R., D.J. Soldat, J.C. Stier. 2011. Low-temperature Nitrogen Uptake and Use of Three Cool-season Turfgrasses under Controlled Environments. Ca...
S1 E23 Will fall fertilization weaken Kentucky bluegrass?
19 Nov 2023
Contributed by Lukas
Wilkinson and Duff. 1972. Effects of Fall Fertilization on Cold Resistance, Color, and Growth of Kentucky Bluegrass Calendly.com/TravisShaddox Twitter...
S1 E22 Will Nitrogen Reduce Turfgrass Drought and Temperature Tolerance?
19 Nov 2023
Contributed by Lukas
Carroll, 1943. Effects of Drought, Temperature and Nitrogen on Turf Grasses. Calendly.com/TravisShaddox Twitter.com/TravisShaddox
S1 E21 Does Winter-Applied Nitrogen Increase Root Growth?
19 Nov 2023
Contributed by Lukas
Powell, et al., 1967. Effect of Nitrogen on Winter Root Growth of Bentgrass. Carrol and Welton. 1939. Effect of Heavy and Late Applications of Nitroge...
S1 E20 Does Fall or Winter Nitrogen Harm Bentgrass and Fescue?
19 Nov 2023
Contributed by Lukas
Powell, et al., 1967. Physiological and Color Aspects of Turfgrasses with Fall and Winter Nitrogen. Calendly.com/TravisShaddox Twitter.com/TravisShadd...
S1 E19 Phosphorus has very little effect on turfgrass establishment, but it is justified. What?
19 Nov 2023
Contributed by Lukas
Chang, et al., 2014. Phosphorus Responses Vary among Cool-Season Turfgrasses during Establishment from Seed. Calendly.com/TravisShaddox Twitter.com/Tr...
S1 E18 Dr. Ross Braun - Do new turfgrasses need less fertilizer and pesticides?
19 Nov 2023
Contributed by Lukas
Braun, et al., 2023. Assessing the fertilizer and pesticide input needs of cool-season turfgrass species Calendly.com/TravisShaddox Twitter.com/Travis...
S1 E17 Does the placement and rate of nitrogen and phosphorus affect turfgrass establishment?
19 Nov 2023
Contributed by Lukas
King and Skogley, 1969. Effect of Nitrogen and Phosphorus Placements and Rates on Turfgrass Establishment Calendly.com/TravisShaddox Twitter.com/Travi...
S1 E16 Do you need starter fertilizer for tall fescue establishment?
19 Nov 2023
Contributed by Lukas
Liu and Landschoot, 2018. Influence of Phosphorus in Starter Fertilizer on the Establishment of Tall Fescue. Calendly.com/TravisShaddox Twitter.com/Tr...
S1 E15 When Should You Plant Cool-season Turfgrasses?
19 Nov 2023
Contributed by Lukas
Reicher, et al., 2022. Date of Seeding Affects Establishment of Cool-season Turfgrasses Calendly.com/TravisShaddox Twitter.com/TravisShaddox
S1 E14 How Much Nitrogen Do You Need to Apply During Fine Fescue Establishment?
19 Nov 2023
Contributed by Lukas
Braun, et al., 2022. Nitrogen fertilizer and clover inclusion effects on the establishment of fine fescue taxa Calendly.com/TravisShaddox Twitter.com...
S1 E13 The Problem with Applying Biosolids to Turfgrass
19 Nov 2023
Contributed by Lukas
Cogger, et al., 2013. Biosolids Applications to Tall Fescue Have Long-Term Influence on Soil Nitrogen, Carbon, and Phosphorus Calendly.com/TravisShad...
S1 E12 Does Compost Aid Turfgrass Establishment on Disturbed Soils?
19 Nov 2023
Contributed by Lukas
Badzmierowski, et al., 2019. Biosolids-Based Amendments Improve Tall Fescue Establishment and Urban Soils Calendly.com/TravisShaddox Twitter.com/Trav...
S1 E11 Mulch and Starter Fertilizer Effects on Turfgrass Establishment
19 Nov 2023
Contributed by Lukas
Braun, et al., 2020. Establishment of low-input turfgrass from seed with patch and repairmixtures:Mulch and starter fertilizer effects Calendly.com/T...
S1 E10 Soil Test Nutrient Levels for Turfgrass Establishment
19 Nov 2023
Contributed by Lukas
Turner and Waddington. 1983. Soil Test Calibration for Establishment of Turfgrass Monostands. Calendly.com/TravisShaddox Twitter.com/TravisShaddox
S1 E9 Bermudagrass Response To Potassium Fertilization
19 Nov 2023
Contributed by Lukas
Sartain, 2002. Tifway Bermudagrass Response To Potassium Fertilization Calendly.com/TravisShaddox Twitter.com/TravisShaddox
S1 E8 The Dean of Research and the Hierarchy of Evidence
19 Nov 2023
Contributed by Lukas
The dean of research joins me to discuss the hierarchy of evidence. Levels of evidence are an important component of evidence-based turfgrass manageme...
S1 E7 Perennial Ryegrass Cold Tolerance as Influenced by Nitrogen and Potassium
19 Nov 2023
Contributed by Lukas
Webster and Ebdon. 2005. Effects of Nitrogen and Potassium Fertilization on Perennial Ryegrass Cold Tolerance During Deacclimation in Late Winter and ...
S1 E6 Shaddox’s Hierarchy of Risks
19 Nov 2023
Contributed by Lukas
Noer, O.J. 1928. The ABC of Turf Culture. Calendly.com/TravisShaddox Twitter.com/TravisShaddox
S1 E5 Bermudagrass Response to Fall-Applied Potassium
19 Nov 2023
Contributed by Lukas
Miller and Dickens. 1996. Potassium Fertilization Related to Cold Resistance in Bermudagrass.
S1 E4 Potassium Research in Turfgrass
19 Nov 2023
Contributed by Lukas
Frank and Guertal. 2013. Potassium and Phosphorus Research in Turfgrass.
S1 E3 Fall Applied Nitrogen to Turfgrass
19 Nov 2023
Contributed by Lukas
Bauer, et al., 2012. Agronomic and Physiological Responses of Cool-Season Turfgrass to Fall-Applied Nitrogen.
S1 E2 Nitrogen Potassium Ratios for Turfgrass
19 Nov 2023
Contributed by Lukas
Snyder and Cisar. 2000. Nitrogen/Potassium Fertilization Ratios for Bermudagrass Turf.
S1 E1 Iron Solubility in Soils
19 Nov 2023
Contributed by Lukas
Lindsay and Schwab, 1982. The chemistry of iron in soils and its availability to plants.