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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S2 E42 Dr. Ervin - Seaweed and Humic Acid Influence Bentgrass Drought Resistance
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Zhang, X. and Ervin, E.H. (2004), Cytokinin-Containing Seaweed and Humic Acid Extracts Associated with Creeping Bentgrass Leaf Cytokinins and Drought Resistance. Crop Science, 44: 1737-1745. https://doi.org/10.2135/cropsci2004.1737 Join Turfgrass Epistemology to get access to perks: https://www.youtube.com/channel/UC-UZnHkJhAmARDZ4YoHnc_A/join Voic…
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S2 E41 Bermudagrass Response to Microbial Inoculants.
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Bolton, C., Cabrera, M. L., Habteselassie, M., Poston, D., & Henry, G. M. (2022). The impact of commercially available microbial inoculants on bermudagrass establishment, aesthetics, and function. Crop, Forage & Turfgrass Management, 8, e20190. https://doi.org/10.1002/cft2.20190 Join Turfgrass Epistemology to get access to perks: https://www.youtub…
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S2 E40 Humic-coated Urea ≠ Better Turfgrass
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Lindsey AJ, Thoms AW, McDaniel MD, Christians NE. Evaluation of humic fertilizers on a sand-based creeping bentgrass putting green. Crop Science. 2021; 61: 3734–3745. https://doi.org/10.1002/csc2.20577 Join Turfgrass Epistemology to get access to perks: https://www.youtube.com/channel/UC-UZnHkJhAmARDZ4YoHnc_A/join Voicemail: 859-444-4234 Apple Podc…
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S2 E39 Late-Season Biostimulant Effects on Bermudagrass
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Munshaw, G.C., Ervin, E.H., Shang, C., Askew, S.D., Zhang, X. and Lemus, R.W. (2006), Influence of Late-Season Iron, Nitrogen, and Seaweed Extract on Fall Color Retention and Cold Tolerance of Four Bermudagrass Cultivars. Crop Science, 46: 273-283. https://doi.org/10.2135/cropsci2005.0078 Join Turfgrass Epistemology to get access to perks: https://…
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S2 E38 Biostimulant effects on creeping bentgrass.
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Ervin, E.H., Zhang, X., Goatley, J.M., Jr., & Askew, S.D. (2004). Trinexapac-ethyl, Propiconazole, Iron, and Biostimulant Effects on Shaded Creeping Bentgrass. HortTechnology horttech, 14(4), 500-506. Retrieved Apr 8, 2024, from https://doi.org/10.21273/HORTTECH.14.4.0500 Join Turfgrass Epistemology to get access to perks: https://www.youtube.com/c…
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S2 E37 Will Applied Potassium Protect Turfgrass from Winter Injury?
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Schmid, C.J., Murphy, J.A., Clarke, B.B., DaCosta, M. and Ebdon, J.S. (2016), Observations on the Effect of Potassium on Winter Injury of Annual Bluegrass in New Jersey in 2015. Crop, Forage & Turfgrass Management, 2: 1-4 cftm2015.0170. https://doi.org/10.2134/cftm2015.0170 Join Turfgrass Epistemology to get access to perks: https://www.youtube.com…
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S2 E36 Bermudagrass Response to Applied Potassium.
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Sartain, J.B. (2002), Tifway Bermudagrass Response To Potassium Fertilization. Crop Sci., 42: 507-512. https://doi.org/10.2135/cropsci2002.5070 Join Turfgrass Epistemology to get access to perks: https://www.youtube.com/channel/UC-UZnHkJhAmARDZ4YoHnc_A/join Voicemail: 859-444-4234 Apple Podcast https://podcasts.apple.com/us/podcast/turfgrass-episte…
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S2 E35 Can potassium enhance turfgrass shade tolerance?
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Cai, X., Trenholm, L. E., Kruse, J., & Sartain, J. B. (2011). Response of ‘Captiva’ St. Augustinegrass to Shade and Potassium. HortScience horts, 46(10), 1400-1403. Retrieved Mar 26, 2024, from https://doi.org/10.21273/HORTSCI.46.10.1400 Join Turfgrass Epistemology to get access to perks: https://www.youtube.com/channel/UC-UZnHkJhAmARDZ4YoHnc_A/joi…
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S2 E34 Nitrogen to Potassium Ratios for Bermudagrass.
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Snyder, G.H. and Cisar, J.L. (2000), Nitrogen/Potassium Fertilization Ratios for Bermudagrass Turf. Crop Sci., 40: 1719-1723. https://doi.org/10.2135/cropsci2000.4061719x Join Turfgrass Epistemology to get access to perks: https://www.youtube.com/channel/UC-UZnHkJhAmARDZ4YoHnc_A/join Voicemail: 859-444-4234 Apple Podcast https://podcasts.apple.com/…
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S2 E33 Will Potassium Increase or Decrease Anthracnose on Poa Annua?
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Schmid, C.J., Clarke, B.B. and Murphy, J.A. (2018), Potassium Nutrition Affects Anthracnose on Annual Bluegrass. Agronomy Journal, 110: 2171-2179. https://doi.org/10.2134/agronj2018.03.0147 Join Turfgrass Epistemology to get access to perks: https://www.youtube.com/channel/UC-UZnHkJhAmARDZ4YoHnc_A/join Live Show: M, T, W - 10:00 am EST Th - 9:00 pm…
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S2 E32 Centipedegrass Decline and Recovery Using N, P, and K.
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Johnson, B.J., Carrow, R.N. and Burns, R.E. (1988), Centipedegrass Decline and Recovery as Affected by Fertilizer and Cultural Treatments. Agron. J., 80: 479-486. https://doi.org/10.2134/agronj1988.00021962008000030018x Join Turfgrass Epistemology to get access to perks: https://www.youtube.com/channel/UC-UZnHkJhAmARDZ4YoHnc_A/join Live Show: M, T,…
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S2 E31 Dr. Woods - Potassium for Putting Green Turfgrass.
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Woods, M.S., Ketterings, Q.M., Rossi, F.S. and Petrovic, A.M. (2006), Potassium Availability Indices and Turfgrass Performance in a Calcareous Sand Putting Green. Crop Science, 46: 381-389. https://doi.org/10.2135/cropsci2005.0218 More information on Dr. Woods and on his potassium publication can be found here: https://www.asianturfgrass.com/public…
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S2 E30 Turfgrass Potassium. Soils Matter!
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Dest, W.M and K. Guillard. 2001. Bentgrass response to K fertilization and K release rates from eight sand rootzone sources used in putting green construction. Int. Turf. Soc. Res. J. 9:375-381. Join this channel to get access to perks: https://www.youtube.com/channel/UC-UZnHkJhAmARDZ4YoHnc_A/join Live Show: M, T, W - 10:00 am EST Th - 9:00 pm EST …
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S2 E29 Potassium Can Increase Disease on Turfgrass
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Bier, P.V., Persche, M., Koch, P. et al. A long term evaluation of differential potassium fertilization of a creeping bentgrass putting green. Plant Soil 431, 303–316 (2018). https://doi.org/10.1007/s11104-018-3765-8 Join this channel to get access to perks: https://www.youtube.com/channel/UC-UZnHkJhAmARDZ4YoHnc_A/join Live Show: M, T, W - 10:00 am…
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S2 E28 Remove or Return Turfgrass Clippings?
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Sartain, J.B. (1993), Interrelationships among Turfgrasses, Clipping Recycling, Thatch, and Applied Calcium, Magnesium, and Potassium. Agron. J., 85: 40-43. https://doi.org/10.2134/agronj1993.00021962008500010008x Live Show: M, T, W - 10:00 am EST Th - 9:00 pm EST Voicemail: 859-444-4234 Apple Podcast https://podcasts.apple.com/us/podcast/turfgrass…
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S2 E27 Potassium source and rate effect on creeping bentgrass
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Waddington, D.A., Moberg, E.L. and Duich, J.M. (1972), Effect of N Source, K Source, and K Rate on Soil Nutrient Levels and the Growth and Elemental Composition of Penncross Creeping Bentgrass, Agrostis palustris Huds. Agron. J., 64: 562-566. https://doi.org/10.2134/agronj1972.00021962006400050002x Live Show: M, T, W - 10:00 am EST Th - 9:00 pm EST…
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S2 E26 Potassium and Phosphorus on Creeping Bentgrass Putting Greens
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Johnson, P.G., Koenig, R.T. and Kopp, K.L. (2003), Nitrogen, Phosphorus, and Potassium Responses and Requirements in Calcareous Sand Greens. Agron. J., 95: 697-702. https://doi.org/10.2134/agronj2003.6970 Live Show: M, T, W - 10:00 am EST Th - 9:00 pm EST Voicemail: 859-444-4234 Apple Podcast https://podcasts.apple.com/us/podcast/turfgrass-epistemo…
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Live Show: M, T, W - 10:00 am EST Th - 9:00 pm EST Voicemail: 859-444-4234 Apple Podcast https://podcasts.apple.com/us/podcast/turfgrass-epistemology/id1717271379 Spotify Podcast https://open.spotify.com/show/1cTpdrChToeEFAOX9wkXFI iHeart Radio Podcast https://www.iheart.com/podcast/1323-turfgrass-epistemology-129043524/ Podbean https://turfgrassep…
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S2 E24 Long-Term Influence of N and K on Perennial Ryegrass Turf
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Ebdon, J.S., DaCosta, M., Spargo, J. and Dest, W.M. (2013), Long-term Effects of Nitrogen and Potassium Fertilization on Perennial Ryegrass Turf. Crop Science, 53: 1750-1761. https://doi.org/10.2135/cropsci2012.06.0395 Live Show: M, T, W - 10:00 am EST W - 9:00 pm EST Voicemail: 859-444-4234 Apple Podcast https://podcasts.apple.com/us/podcast/turfg…
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S2 E23 Kentucky Bluegrass, Potassium, and Nitrogen.
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Fitzpatrick, R.J.M. and Guillard, K. (2004), Kentucky Bluegrass Response to Potassium and Nitrogen Fertilization. Crop Science, 44: 1721-1728. https://doi.org/10.2135/cropsci2004.1721 Live Show: M, T, W - 10:00 am EST W - 9:00 pm EST Voicemail: 859-444-4234 Apple Podcast https://podcasts.apple.com/us/podcast/turfgrass-epistemology/id1717271379 Spot…
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S2 E22 Dr. Richardson - Turfgrass Uptake of Foliar Urea
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Stiegler, J.C., Richardson, M.D. and Karcher, D.E. (2011), Foliar Nitrogen Uptake Following Urea Application to Putting Green Turfgrass Species. Crop Sci., 51: 1253-1260. https://doi.org/10.2135/cropsci2010.06.0377 Live Show: M, T, W - 10:00 am EST W - 9:00 pm EST Voicemail: 859-444-4234 Apple Podcast https://podcasts.apple.com/us/podcast/turfgrass…
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S2 E21 Is UMaxx U-seless for Turfgrass?
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Guertal, E.A. and Howe, J.A. (2012), Nitrate, Ammonium, and Urea Leaching in Hybrid Bermudagrass as Affected by Nitrogen Source. Agron. J., 104: 344-352. https://doi.org/10.2134/agronj2011.0262 Live Show: M, T, W - 10:00 am EST W - 9:00 pm EST Voicemail: 859-444-4234 Apple Podcast https://podcasts.apple.com/us/podcast/turfgrass-epistemology/id17172…
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S2 E20 Type of Granular Urea Influences Nitrogen Volatilization from Turfgrass
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Volk, G.M. (1959), Volatile Loss of Ammonia Following Surface Application of Urea to Turf or Bare Soils. Agron. J., 51: 746-749. https://doi.org/10.2134/agronj1959.00021962005100120016x Live Show: M, T, W - 10:00 am EST W - 9:00 pm EST Voicemail: 859-444-4234 Apple Podcast https://podcasts.apple.com/us/podcast/turfgrass-epistemology/id1717271379 Sp…
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S2 E19 Kentucky Bluegrass Managed with Sprayable Nitrogen Programs
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Moore, R.W., Christians, N.E. and Agnew, M.L. (1996), Response of Three Kentucky Bluegrass Cultivars to Sprayable Nitrogen Fertilizer Programs. Crop Science, 36: 1296-1301. https://doi.org/10.2135/cropsci1996.0011183X003600050037x Live Show: M, T, W - 10:00 am EST W - 9:00 pm EST Voicemail: 859-444-4234 Apple Podcast https://podcasts.apple.com/us/p…
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S2 E18 How much water should you apply after applying urea?
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Bowman, D. C., Paul, J. L., Davis, W. B., & Nelson, S. H. (1987). Reducing Ammonia Volatilization from Kentucky Bluegrass Turf by Irrigation. HortScience, 22(1), 84-87. https://doi.org/10.21273/HORTSCI.22.1.84 Live Show: M, T, W - 10:00 am EST W - 9:00 pm EST Apple Podcast https://podcasts.apple.com/us/podcast/turfgrass-epistemology/id1717271379 Sp…
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S2 E17 February 2024 Comments and Voicemail
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Live calls and voice mail: 859-444-4234 Live Show: M, T, W - 10:00 am EST W - 9:00 pm EST Apple Podcast https://podcasts.apple.com/us/podcast/turfgrass-epistemology/id1717271379 Spotify Podcast https://open.spotify.com/show/1cTpdrChToeEFAOX9wkXFI iHeart Radio Podcast https://www.iheart.com/podcast/1323-turfgrass-epistemology-129043524/ Podbean http…
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S2 E16 Dr. Christians - Do Urease Inhibitors Enhance Turfgrass Quality or Growth?
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Joo, Y.K., Christians, N.E., Spear, G.T. and Bremner, J.M. (1992), Evaluation of Urease Inhibitors as Urea Amendments for Use on Kentucky Bluegrass Turf. Crop Science, 32: 1397-1401 cropsci1992.0011183X003200060018x. https://doi.org/10.2135/cropsci1992.0011183X003200060018x Live calls and voice mail: 859-444-4234 Live Show: M, T, W - 10:00 am EST W…
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S2 E15 Does NBPT increase N uptake in Kentucky bluegrass?
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Joo, Y.K., Christians, N.E. and Blackmer, A.M. (1991), Kentucky Bluegrass Recovery of Urea-Derived Nitrogen-15 Amended with Urease Inhibitor. Soil Science Society of America Journal, 55: 528-530. https://doi.org/10.2136/sssaj1991.03615995005500020039x Live calls and voice mail: 859-444-4234 Live Show: M, T, W - 10:00 am EST W - 9:00 pm EST Apple Po…
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S2 E14 Is stabilized nitrogen worthless for turfgrass?
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Henning, S.W., Branham, B.E. & Mulvaney, R.L. Response of turfgrass to urea-based fertilizers formulated to reduce ammonia volatilization and nitrate conversion. Biol Fertil Soils 49, 51–60 (2013). https://doi.org/10.1007/s00374-012-0696-z Live calls and voice mail: 859-444-4234 Live Show: M, T, W - 10:00 am EST W - 9:00 pm EST Apple Podcast https:…
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S2 E13 Turfgrass quality, urea, and dycandiamide. Is DCD worth the money?💵
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Mosdell, D.K., Daniel, W.H. and Freeborg, R.P. (1986), Evaluation of Dicyandiamide-Amended Fertilizers on Kentucky Bluegrass. Agron. J., 78: 801-806. https://doi.org/10.2134/agronj1986.00021962007800050012x Live calls and voice mail: 859-444-4234 Live Show: M, T, W - 10:00 am EST W - 9:00 pm EST Apple Podcast https://podcasts.apple.com/us/podcast/t…
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S2 E12 Liquid Nitrogen Applied to Kentucky Bluegrass.
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Spangenberg, B.G., Fermanian, T.W. and Wehner, D.J. (1986), Evaluation of Liquid-Applied Nitrogen Fertilizers on Kentucky Bluegrass Turf. Agron. J., 78: 1002-1006. https://doi.org/10.2134/agronj1986.00021962007800060014x Live calls and voice mail: 859-444-4234 Live Show: M, T, W - 10:00 am EST W - 9:00 pm EST Apple Podcast https://podcasts.apple.co…
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S2 E11 One Nitrogen Application per Year. Will it Work?
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Soldat, D.J., Petrovic, A.M. and Barlow, J. (2008). Turfgrass Response to Nitrogen Sources with Varying Nitrogen Release Rates. Acta Hortic. 783, 453-462 Live calls and voice mail: 859-444-4234 Live Show: M, T, W - 10:00 am EST W - 9:00 pm EST Apple Podcast https://podcasts.apple.com/us/podcast/turfgrass-epistemology/id1717271379 Spotify Podcast ht…
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Shaddox, T. W., & Unruh, J. B. (2021). Determining Nitrogen Fertilizer Cost Using Turfgrass Response. HortTechnology. 31(4), 470-478. Live calls and voice mail: 859-444-4234 Live Show: M, T, W - 10:00 am EST W - 9:00 pm EST Apple Podcast https://podcasts.apple.com/us/podcast/turfgrass-epistemology/id1717271379 Spotify Podcast https://open.spotify.c…
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S2 E9 Turfgrass Response to Various Nitrogen Sources
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Landschoot, P.J., and D.V. Waddington. 1987. Response of turfgrass to various nitrogen sources. Soil Sci. Soc. Am. J. 51:225-230. Live calls and voice mail: 859-444-4234 Live Show: M, T, W - 10:00 am EST W - 9:00 pm EST Apple Podcast https://podcasts.apple.com/us/podcast/turfgrass-epistemology/id1717271379 Spotify Podcast https://open.spotify.com/s…
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S2 E8 Turfgrass Response to Slow Release Nitrogen Fertilizer
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Carrow, R.N. (1997), Turfgrass Response to Slow-Release Nitrogen Fertilizers. Agron. J., 89: 491-496. Live calls and voice mail: 859-444-4234 Live Show: M, T, W - 10:00 am EST W - 9:00 pm EST Apple Podcast https://podcasts.apple.com/us/podcast/turfgrass-epistemology/id1717271379 Spotify Podcast https://open.spotify.com/show/1cTpdrChToeEFAOX9wkXFI i…
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S2 E7 Dr. Glen Obear - Iron Cementing Layers in Golf Putting Greens.
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Glen R. Obear, Alfred E. Hartemink, Douglas J. Soldat. 2014. Soils with iron-cemented layers on golf courses in the USA, Geoderma 232–234:198-207. Live calls and voice mail: 859-444-4234 Live Show: M, T, W - 10:00 am EST W - 9:00 pm EST Apple Podcast https://podcasts.apple.com/us/podcast/turfgrass-epistemology/id1717271379 Spotify Podcast https://o…
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S2 E6 The soil pH diagram - soil mineralogical and chemical issues.
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Barrow, N.J., Hartemink, A.E. The effects of pH on nutrient availability depend on both soils and plants. Plant Soil 487, 21–37 (2023). Live calls and voice mail: 859-444-4234 Live Show: M, T, W - 10:00 am EST W - 9:00 pm EST Apple Podcast https://podcasts.apple.com/us/podcast/turfgrass-epistemology/id1717271379 Spotify Podcast https://open.spotify…
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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 Live Show: M, T, W - 10:00 am EST W - 9:00 pm EST Calendly.com/TravisShaddox Twitter.com/TravisShaddoxTravis Shaddox による
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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 Bentgrass. Agron. J., 84: 496-503. Live calls and voice mail: 859-444-4234 Live Show: M, T, W - 10:00 am EST W - 9:00 pm EST Calendly.com/TravisShaddox Twitter.com/TravisShaddox…
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S2 E3 Iron applied with elemental sulfur.
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1:16:48
Ryan C. Christensen , Bryan G. Hopkins hopkins@byu.edu , Von D. Jolley , Kelly M. Olson , Christopher M. Haskell , Nicholas J. Chariton & Bruce L. Webb (2012) ELEMENTAL SULFUR IMPREGNATED WITH IRON AS A FERTILIZER SOURCE FOR KENTUCKY BLUEGRASS, Journal of Plant Nutrition, 35:12, 1878-1895. Live calls and voice mail: 859-444-4234 Live Show: M, T, W …
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S2 E2 Granular vs. foliar Fe, Mn, and Mg fertilizers for turfgrass
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1:30:52
Shaddox TW, Unruh JB, Restuccia NG. St. Augustinegrass quality and nutrient content in response to granular and foliar iron, manganese, and magnesium. Crop Science. 2020;60:3314–3327. Live calls and voice mail: 859-444-4234 Live Show: M, T, W - 10:00 am EST W - 9:00 pm EST Calendly.com/TravisShaddox Twitter.com/TravisShaddox…
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S2 E1 How long does iron fertilizer remain soluble in soil?
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1:25:29
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), Solubility of Ten Iron Fertilizers in Eleven North American Soils. Agronomy Journal, 111: 1498-1505. Live calls and voice mail: 859-444-4234 Live Show: M, T, W - 10:00 am EST W - 9:00 pm EST Calendly.com/Trav…
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I discuss a thatch video claiming to reducing thatch by applying natural organic products, address two comments from an iron video, and talk to callers about iron, soil tests, etc. Live calls and voice mail: 859-444-4234 Live YouTube Show: M, T, W - 10:00 am EST W - 9:00 pm EST Calendly.com/TravisShaddox Twitter.com/TravisShaddox…
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Live calls: 859-444-4234 Calendly.com/TravisShaddox Twitter.com/TravisShaddoxTravis Shaddox による
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S1 E60 Foliar iron can increase turfgrass growth.
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Cooper, R.J., & Spokas, L.A. 1991. Growth, Quality, and Foliar Iron Concentration of Kentucky Bluegrass Treated with Chelated Iron Sources. Journal of the American Society for Horticultural Science. 116(5), 798-801. Calendly.com/TravisShaddox Twitter.com/TravisShaddox Live YouTube Schedule: M, T, W - 10:00 am EST W - 9:00 pm EST…
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S1 E59 Granular vs. foliar iron applied to severely Fe-deficient Kentucky Bluegrass
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1:07:22
D.D. Minner and J.D. Butler. 1984. Correcting Iron Deficiency of Kentucky Bluegrass. HortScience. 19:109-110. Calendly.com/TravisShaddox Twitter.com/TravisShaddoxTravis Shaddox による
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S1 E58 Chelated iron vs. iron sulfate on Kentucky Bluegrass
1:05:21
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1:05:21
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/TravisShaddox Twitter.com/TravisShaddoxTravis Shaddox による
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S1 E57 Chelated iron + nitrogen ≠ ’double dark’ turfgrass.
1:30:48
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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. Calendly.com/TravisShaddox Twitter.com/TravisShaddoxTravis Shaddox による
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S1 E56 Iron and Manganese and Boron, Oh My!
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1:13:08
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/TravisShaddox Twitter.com/TravisShaddoxTravis Shaddox による
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An introduction to iron for turfgrasses. Calendly.com/TravisShaddox Twitter.com/TravisShaddoxTravis Shaddox による
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