Golf Course Management

JAN 2014

Golf Course Management magazine is dedicated to advancing the golf course superintendent profession and helping GCSAA members achieve career success.

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Global Soil Survey for Sustainable Turf PACE Turf and Asian Turfgrass Center have teamed up to administer a citizen scientist project known as the "Global Soil Survey for Sustainable Turf." The survey hopes to enlist the participation of superintendents from around the globe in an effort to validate and expand upon the Minimum Levels for Sustainable Nutrition (MLSN) soil guidelines described in this article, and in so doing, contribute to positive changes in the way turf is fertilized. Participants in the survey will receive a sampling kit that allows them to collect soil samples from three areas of turf that performs well at their facility. These samples will be analyzed by Brookside Labs for nutrient content, and the data will be added to the PACE Turf/Asian Turfgrass Center database and analyzed. The result will be new and improved sustainable guidelines for turf nutrition that will be publicly shared with the turf community. If you are interested in learning more about the Global Soil Survey, read more at: www. paceturf.org/journal/global_soil_survey RESEARCH SAYS • Turf soil nutrient requirements for several key elements may be much lower than previously thought. • The Minimum Levels for Sustainable Nutrition (MLSN) guidelines are a new, more sustainable approach to turfgrass nutrition. • Use of the MLSN guidelines can result in dramatic cost savings, and an improved environmental profile, without a loss in turf quality. • The guidelines were developed using data collected from thousands of soil samples from turf that performed well. • The concept of a "sustainability index" — a tool for measuring progress toward reduced inputs — is introduced. 138 GOLF COURSE MANAGEMENT 01.14 sustainable_nutrition. To join other turfgrass managers from around the world in a discussion of these guidelines or to pose questions about the guidelines, go to the MLSN page on Facebook: www.facebook.com/mlsnturf. For even more examples of how the MLSN guidelines ft into turfgrass nutrient requirements and how these requirements can be calculated, download Understanding Turfgrass Nutrient Requirements at: http://calendar.asianturf grass.com/understanding_turfgrass_nutrient_ requirements_5june2012.pdf. Acknowledgments We gratefully acknowledge the hundreds of golf course superintendents who have submitted soil samples over the past 20 years, and whose soil test results were the basis for development of the MLSN guidelines. Literature cited 1. Carrow, R.N., L. Stowell, W. Gelernter et al. 2004. Clarifying soil testing: III. SLAN suffciency ranges and recommendations. Golf Course Management 72(1):194-198. 2. 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 3. 4. 5. 6. 7. 8. construction. International Turfgrass Society Research Journal 9:375-381. Fulton, M. 2002. Creeping bentgrass responses to long-term applications of nutrients. Golf Course Management 70(2):62-65. Kreuser, W.C., P.H. Pagliari and D.J. Soldat. 2012. Creeping bentgrass putting green Mehlich-3 soil test phosphorus requirements. Crop Science 52:13851392. Kussow, W.R., D.J. Soldat, W.C. Kreuser and Steven M. Houlihan. 2012. Evidence, regulation, and consequences of nitrogen-driven nutrient demand by turfgrass. Online. ISRN Agronomy Vol. 2012, Article ID 359284. doi:10.5402/2012/359284 (www.hindawi. com/isrn/agronomy/2012/359284/). Verifed Dec. 9, 2013. Raley, R.B., P.J. Landschoot and J.T. Brosnan. 2013. Infuence of phosphorus and nitrogen on annual bluegrass encroachment in a creeping bentgrass putting green. International Turfgrass Society Research Journal 12:649-655. Stowell, L., and M. Woods. 2013. Minimum levels for sustainable nutrition. Proceedings: Constructed Rootzones 2012. Online. Applied Turfgrass Science (www. plantmanagementnetwork.org/pub/ats/ proceedings/2013/rootzones/8.htm). Verifed Dec. 9, 2013. Woods, M.S., Q.M. Ketterings, F.S. Rossi and A.M. Petrovic. 2006. Potassium availability indices and turfgrass performance in a calcareous sand putting green. Crop Science 46:381-389. Micah Woods (micah@asianturfgrass.com) is chief scientist at the Asian Turfgrass Center and an adjunct assistant professor in the department of plant sciences at the University of Tennessee, Knoxville. Larry Stowell and Wendy Gelernter are the principals of Pace Turf LLC, San Diego, Calif.

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