Getting the most out of a wetting agent program starts with moving beyond the unknowns and confusion surrounding marketing terminology. Wetting agent chemistry is inherently versatile, so understanding the roles that weather and cultural management play in their performance is key to maximizing their benefits. For sand-based greens, have a target VWC range in mind, but don’t rely on wetting agent applications alone to achieve that goal. Consistently track VWC and evapotranspiration, making the necessary adjustments to wetting agent application rates, timings and irrigation as needed. Finally, appreciate that organic matter is the gatekeeper to success for so many putting green management practices, wetting agent applications included. Considering all these factors together will help refine wetting agent programs and help achieve the goals of infiltration and retention alike.
About the Authors
Daniel O’Brien is a graduate research assistant and Ph.D. student at the University of Arkansas in Fayetteville, Ark.
Mike Fidanza, Ph.D., is a professor of plant and soil sciences at the Pennsylvania State University, Berks Campus in Reading, Pa.
Stan Kostka, Ph.D., is a visiting scholar of plant and soil sciences at the Pennsylvania State University, Berks Campus in Reading, Pa.
Mike Richardson, Ph.D., is a professor in the horticulture department at the University of Arkansas in Fayetteville, Ark.
References
Abagandura, G. O., Park, D., Bridges Jr, W. C., & Brown, K. (2021). Soil surfactants applied with 15N labeled urea increases bermudagrass uptake of nitrogen and reduces nitrogen leaching. Journal of Plant Nutrition and Soil Science, 184(3), 378-387.
DeBoer, E.J., Karcher, D.E., McCalla, J.H., & Richardson, M. D. (2020). Effect of late-fall wetting agent application on winter survival of ultradwarf bermudagrass putting greens. Crop, Forage and Turfgrass Management, 6(1), 1-7.
Fidanza, M., Kostka, S., & Bigelow, C. (2020). Communication of soil water repellency - causes, problems, and solutions of intensively managed amenity turf from 2000 to 2020. Journal of Hydrology and Hydromechanics, 68(4), 306-312.
Fleetwood, M., & Xiong, X. (2021). Improving water retention in hydrophobic soil. 2021 Turfgrass Field Day Online Golf Session. August 12, 2021. University of Arkansas System Division of Agriculture and University of Missouri Extension.
Hutchens, W. J., Gannon, T. W., Shew, H. D., Ahmed, K. A., & Kerns, J. P. (2020). Journal of Environmental Quality, 49(2), 450-459.
Jacobs, P., & Barden, A. (2018). Factors to consider when developing a wetting agent program: A one-size-fits-all approach to developing a wetting agent program is not possible. USGA Green Section Record, 56(9), 1-6.
Karcher, D. E., Richardson, M. D., & O'Brien, D. P. (2020). How do various wetting agents affect water movement and retention in sand-based putting green profiles?. 2020 ASA, CSSA and SSSA International Annual Meeting. ASA-CSSA-SSSA.
Kostka, S., Fidanza, M., & Bigelow, C. (2022). The science behind wetting agent applications. Greenkeeper International, March 2022, 74-75.
McCarty, L.B., & Kerns, J.P. (2016). Best Management Practices for Carolinas Golf Courses. Carolinas Golf Course Superintendents Association. 63-66.
Song, E., Pan, X., Kremer, R. J., Goyne, K. W., Anderson, S. H., & Xiong, X. (2019). Influence of repeated application of wetting agents on soil water repellency and microbial community. Sustainability, 11(16), 4505.
Throssell, C. (2005). GCSAA-USGA wetting agent evaluation. Golf Course Management, 73(4), 52-91.
Zontek, S. J., & Kostka, S.J. (2012). Understanding the different wetting agent chemistries: A surfactant is a wetting agent but a wetting agent may not be a surfactant. Surprised?. USGA Green Section Record, 50(15), 1-6.