Abstract
Abstract Media used in golf green construction are typically at least 75% sand by volume. This field study was conducted over 8 years on a sand medium to determine creeping bentgrass (Agrostis palustris Huds.) quality response to P and K. Phosphorus (0, 5, and 11 kgha-1) and K (0, 4, and 8 kg-ha-1) treatments were arranged factorially and applied monthly to creeping bentgrass receiving uniform N (49 kg/ha per month). A significant (quadratic) response of creeping bentgrass quality to increasing P level was observed each year. Creeping bentgrass fertilized at 5 or 11 kg P/ha per month was similar in quality. Potassium had no effect on visual quality of creeping bentgrass. This study demonstrated the importance of P in maintaining creeping bentgrass quality on a sand-based medium.
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