Full TGIF Record # 192089
Item 1 of 1
Material Type:Manuscript
Monographic Author(s):Starrett, S. K.; Christians, N. E.; Austin, T. A.
Author Affiliation:Starrett: Dep. of Civil and Construction Eng.; Christians: Dep. of Horticulture; and Austin: Dep. of Civil and Construction Eng., Iowa State University, Ames, IA
Monograph Title:Fate of 15N Amended Urea in Turfgrass Biosystems, [1995].
# of Pages:20
Publishing Information:Ames, Iowa: Iowa Agric. and Home Econ. Exp. Stn.
Collation:20 pp.
Abstract/Contents:"The fate of nitrogen (N) has been studied under several agronomic crops and agricultural profiles, but relatively little information has been collected from areas managed as turfgrass. The turfgrass industry has become the focus of environmental concerns in recent years and is often identified as a source of ground water contaminate. The objectives of this study were to investigate the hydrology of 20-cm diam. by 50-cm deep undisturbed soil columns covered with a Kentucky bluegrass (Poa pratensis L.) turf under two irrigation regimes; a single 2.54-cm application and four 0.64-cm applications over a seven-d test period; and to quantify the fate of 15N-labled urea when it is applied to an undisturbed soil columns having intact macropores. Clipping, verdure, and thatch/mat samples were taken from each column, and the soil was excavated in 10-cm layers at the end of the test period. A glass collection chamber was used to collect volatilized N and a plastic bag for leachate collection. All samples were analyzed for atom % 15N. Volatilization of N was negligible when irrigation was applied immediatedly after the application of N. The single irrigation regime significantly increased the transport of N below 30 cm by 5 times, compared to the split irrigation regime. Eighty-five percent of the N found in the leachate from the 50-cm columns was in the urea form indicating that macropores may have played a major role in transport of surface applied N through the soil profile."
See Also:See also related article "Fate of 15N amended urea in turfgrass biosystems" 1995 Iowa Turfgrass Research Report, 1995, p. 91, R=51120 R=51120

See also related article "Fate of amended urea in turfgrass biosystems" Communications in Soil Science and Plant Analysis, 26(9/10), May 1995, p. 1595-1606, R=52291 R=52291
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