Organic Matter Accumulation In TurfGrass

Organic matter (OM) accumulation is a critical factor influencing the health and performance of turfgrass systems, particularly in intensively managed sports fields and golf courses. This layer, primarily composed of undecomposed plant material such as stems and roots, develops over time due to slow microbial breakdown—often exacerbated by high lignin content and excessive fertilization, irrigation, and mowing practices. When left unmanaged, excessive OM can disrupt soil-water balance, leading to conditions that either repel moisture or retain excessive water, both of which negatively impact turf resilience. Understanding the factors driving OM accumulation and implementing effective management strategies are essential to maintaining high-performance turf surfaces. This white paper explores the causes, challenges, and best practices for OM management, providing insights for turf professionals seeking to optimize playing conditions and longevity.