Making sense of turf nutrition with MLSN

Abstract

This article examines different approaches to turfgrass fertilisation and explains how the minimum levels for sustainable nutrition (MLSN) guidelines reconcile these varying philosophies. I compare three distinct methods: the conventional American approach with substantial fertiliser applications that often increase with soil testing, Jim Arthur’s minimalist philosophy recommending little nitrogen and virtually no phosphate or potash, and the STERF precision fertilisation method that supplies all nutrients in plant-tissue proportions. The key insight is that nutrient requirements are proportional to grass growth rate, which varies dramatically by climate—from slow-growing links courses in northern Europe to rapidly growing tropical turf. MLSN bridges these approaches by starting with the assumption that no fertiliser is required, then accounting for actual nutrient use based on growth rate whilst ensuring soil nutrient levels remain above minimum thresholds. This method prevents deficiencies without recommending unnecessary applications, making it suitable for any turf surface regardless of climate or management intensity.