BCSR and MLSN revisited

The turfgrass fertilizer management strategy known as Minimum Levels for Sustainable Nutrition (MLSN) continues to raise the ire of dedicated Base Cation Saturation Ratio (BCSR) supporters. To make the story short and to the point, BCSR is an ineffective and sometimes detrimental method for interpretation of turfgrass soil nutritional status and for developing fertilizer management programs. Using the BCSR method does not consider nutrients needed for growth by the plant, or for nutrients removed as the plants grow. BCSR only…