PACE Turf - Turfgrass Information Center

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:

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:

Global Soil Survey 2015 Report

The Global Soil Survey was launched in August, 2013 to enlist turf managers from around the globe to collaborate in the development of new, more sustainable turf nutrient guidelines. After two years, there are several key results to report:

Sign up for the Global Soil Survey!!. Sign up by mail or sign up online, and become part of history!!

More information on the Global Soil Survey for Sustainable Turf:

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