What percentage of nitrogen applied to lawns is contained in grass clippings?

Grass clippings are a valuable source of nitrogen that contributes significantly to a lawn's nutrient needs. When grass is cut, the clippings contain a large percentage of the nitrogen that was absorbed by the grass during its growth. Research indicates that approximately 50% of the nitrogen applied to lawns is found in the clippings.

By leaving grass clippings on the lawn, often termed grass-cycling, homeowners can return nutrients back to the soil, reducing the need for additional fertilizer applications. This practice not only helps in managing lawn health and appearance but also promotes environmental sustainability by minimizing waste. Therefore, understanding that half of the nitrogen from applied fertilizers can be sustained within the lawn via clippings supports effective lawn management practices.