PACE Turf - Turfgrass Information Center

Super Journal: an online turf research resource

Super Journal is provided by PACE Turf as a free public service to the turfgrass management community. Our mission is to provide an electronic venue for:

  • Superintendents to publish results of their turf research projects and to share them with fellow turf managers.
  • Turf researchers to rapidly publish and disseminate their experimental results.
  • Superintendents who want assistance in designing, carrying out, interpreting and/or summarizing turf research experiments.

Please see our submission guidelines if you wish to have your report published in Super Journal, and our research guide for information on designing and implementing your own turf research project.

Minimum Levels for Sustainable Nutrition Soil Guidelines (MLSN)

Just released: For a comprehensive discussion of MLSN, refer to "The secret MLSN Operations Manual" written by Dr. Micah Woods. 

Increased economic and environmental pressures have caused many turfgrass managers to re–assess the way you manage turf. With fertilizers as one of the bigger inputs, we felt that it was time to review and revise our current soil guidelines to reflect these changes. The result is the "Minimum Level for Sustainable Nutrition" (MLSN) soil guidelines, a new, more sustainable approach to managing soil nutrient levels that can help you to decrease inputs and costs, while still maintaining desired turf quality and playability levels. Used in conjunction with Climate Appraisals and Growth Potential, annual fertilizer needs can be estimated. 

Working together with Dr. Micah Woods of the Asian Turfgrass Center, the guidelines were produced through review of key soil nutrient data from thousands of turf soil samples. Based on our evaluations, we determined that in many cases, guidelines could be safely lowered without a dramatic impact on turf quality or playability.

Since their introduction in 2012, the MLSN guidelines have been adopted by turf managers around the world, who have been surprised to find just how "low they can go" as they more precisely target the nutrient levels that the turf needs.

Scientific basis for the MLSN Guidelines:

Turf management articles about the MLSN Guidelines:

Websites with more information about the MLSN Guidelines:

Growth potential for C3 and C4 grasses

The animated GIFs for cool season grasses (C3_GP) and warm season grasses (C4_GP) were created by plotting Growth Potential (GP)  based upon 30 year normal average monthly temperature (data from National Oceanic and Atmospheric Administration 1950-1980 - tempertures are likely a little higher now, but the trends will be similar) for each zipcode by latitude and longitude. There are about 40,000 data points plotted per month. The GP model has been modified a couple of times over the years, most recently to maximize C4 growth potential when average temperature exceeds the estimated optimum temperature for C4 grasses (88 F or 31.1 C). Refer to this graph for an illustration of the GP model functions.

MLSN and GP at the 2017 GIS

Jason Haines (@PenderSuper on Twitter) and Larry Stowell (@paceturf on Twitter) taught a half-day course on Minimum Levels for Sustainable Nutrition (MLSN) guidelines and Growth Potential (GP) to more than 100 golf course superintendents from around the world. The slide presentation and handout materials used for the course have been provided at the links below:

Page 1 of 51 pages  1 2 3 >  Last ›

Visit PACE Turf on Facebook! Visit PACE Turf on YouTube! Follow PACE Turf on Twitter!