Full TGIF Record # 8155
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Author(s):Powell, A. J. Jr.; Tapp, Linda
Author Affiliation:University of Kentucky
Title:Nitrogen source study
Source:Kentucky Turfgrass Research. 1984, p. 28-31.
Publishing Information:Lexington, KY: University of Kentucky, College of Agriculture, Cooperative Extension Service
Keywords:TIC Keywords: Nitrogen; Growth analysis; Nitrogen fertilizers; Sulfur-coated urea; Urea; IBDU; Methylene urea; Ureaformaldehyde; Poa pratensis; Application rates
Abstract/Contents:1984 update of test to evalute several nitrogen sources using methods most common in the turf industry. Nitrogen sources were urea (46-0-0), methylene urea (Scotts, 41-0-0), sulfur coated urea (Lakeshore, 36-0-0), IBDU (Estech, 31-0-0), urea formaldehyde (BFC Chemicals, 38-0-0) at 1 lb N/1000 sq. ft. on 4/21, 7/26, and 10/31/83 to a Kenblue Kentucky bluegrass turf. Clippings were not removed, irrigation was done only when necessary to prevent summer dormancy or drought injury, and mowing frequency was based upon growth rate. Clipping weights, color, and height were measured weekly 27 times during 1983-84. It was obvious that there were very small differences between urea, sulfur coated urea, methylene urea, and IBDU and that urea formaldehyde was only slightly inferior. As color increased, both growth/day and height increased. There was an indication, however, that the color response caused by IBDU did not result in the same increase in growth/day as was caused by the other fertilizers. This did not seem evident, however, when looking at the height measurements. Although sulfur coated urea resulted in the highest averages for all three measurements, the differences were minute. For many dates, no differences could be measured between the check and fertilizer treatments. Data indicated that although IBDU had better color than the no-nitrogen treatment 15 times, it resulted in a higher growth rate on only seven dates. Sulfur coated urea gave better color than the check 14 times but also gave a higher growth rate on 15 dates and height on 13 dates."
See Also:See also 1985 report, R=19721. R=19721
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Powell, A. J. Jr., and L. Tapp. 1984. Nitrogen source study. KY. Turfgrass Res. p. 28-31.
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MSU catalog number: SB 433 .A1 K4
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