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Effect of fertilization on cultivar penncross creeping bent grass



Effect of fertilization on cultivar penncross creeping bent grass



Agronomy Journal 70(5): 713-718



A field study was conducted on Hagerstown soil (fine, mixed, mesic Typic Hapludalf) to determine the effects of N sources (Agrinite, Milorganite, ureaform and urea), P rates (0, 0.49, 0.98 and 1.95 kg/100 m2), and K rates (0, 0.76, and 1.52 kg/100 m2) on soil nutrient levels and the growth, quality and chemical composition of 'Penncross' creeping bentgrass (Agrostis palustris Huds.) maintained as putting green turf. Wilting, disease, chlorosis and annual bluegrass (Poa annua L.) infestation were used to assess quality. Fertilization with Milorganite increased available soil P and Mg. Available P and K in the soil ranged 11-94 ppm and 0.06-0.28 meq/100 g, respectively. Elemental content of clippings was affected by all treatments, and treatment .times. date of sampling interactions that occurred could limit the usefulness of tissue analyses for diagnosing the nutritional status of turfgrasses. When K was applied at 0.76 kg/100 m2, both tissue and available soil K increased. When the K rate was increased to 1.52 kg/100 m2, the additional increment of K caused a greater increase in soil K and a smaller increase in tissue K than was obtained with the 1st increment of added K. The greatest change in tissue P occurred with the 1st incremental addition of P. Tissue P was not greatly affected by soil P above 24 ppm. P fertilization had little effect on clipping yield; however, K fertilization tended to increase growth, as well as decrease chlorosis noted in early spring. Less severe summer wilting was observed with Agrinite, Milorganite and K treatments. Less dollar spot (Sclerotinia homoeocarpa F.T. ennett) infection was noted with urea fertilization. Annual bluegrass invasion was favored by P and K fertilization and the effect of one was enhanced by the other. Milorganite, which increased soil P, also favored annual bluegrass.

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Accession: 005239057

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