June 2017

SportsTurf provides current, practical and technical content on issues relevant to sports turf managers, including facilities managers. Most readers are athletic field managers from the professional level through parks and recreation, universities.

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Page 13 of 51

FIELD SCIENCE 14 SportsTurf | June 2017 and potassium nitrate are available in granular and in some cases, sprayable forms. Urea is formulated as a solid granule or hollow prill, and may also be applied as a foliar spray. Once bermudagrass is fertilized with urea, and if the soil is moist, this WSN source reacts quickly (usually within 7 to 10 days) with water to form ammonium-N (NH4+). The naturally occurring enzyme urease speeds this reaction. If bermudagrass is growing in alkaline (high pH) soil, ammonia (NH3) may volatize from ammonium-containing N sources as well as urea. Nitrogen losses by ammonia volatilization as high as 30% have been reported. In addition to highly water-soluble N, the K sources muriate of potash (0-0-61) Ammonium sulfate. A soil test report contains valuable information. Urea formaldehyde. Poly-coated urea. Milorganite.

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