Section 31.06 - Soil Testing for the Application of Plant Nutrients, Including Phosphorus Containing Fertilizer, to Non-agricultural Turf and Lawns(1) Soil Tests shall be valid for three years and only for the Management Unit on which the sample was collected. Any subsequent phosphorus applications to the same Management Unit shall be based on the results of a valid Soil Test.(2) Standard Soil Test analyses shall be conducted by a laboratory using methods and procedures recommended by UMass Guidelines.Adopted by Mass Register Issue 1288, eff. 6/5/2015.Amended by Mass Register Issue 1356, eff. 1/12/2018.