Urease Inhibitor Reduces Ammonia Volatilization from Urea‐fertilized Putting Greens

Urea is the predominant N source in liquid fertilizer products applied to turfgrass. Expectations of putting green speed and uniformity compel golf course superintendents to rely on foliar, rather than granular, fertilizer forms in season. This approach combines lesser nutrient rates with more frequent application, and generally improves fertilizer N use efficiency relative to granular fertilizer regiments. However, a combination of putting green playability requirements and explicit label instructions for products already included in the spray tank often preclude employ of current urea fertilizer best management practices.