Full TGIF Record # 261751
Item 1 of 1
Publication Type:
Author(s):Torello, W. A.; Wehner, D. J.
Title:Urea and urease in a Kentucky bluegrass turf
Source:Green World. Vol. 14, No. 1, May/June 1984, p. 3.
# of Pages:1
Publishing Information:Milltown, New Jersey: New Jersey Turfgrass Association
Abstract/Contents:"Loss of nitrogen from volatilization after nitrogen fertilizer application has been studied frequently. Torello, Wehner and Turgeon showed a 10% loss with a high rate of prilled urea. At a normal rate of 49 kg N/Ha (approximately 1 lb N per M ft2) the loss with spray applied urea was 4.6% and was 1.6% from prilled urea. Previous study by others has shown great variability in nitrogen volatilization losses from urea. The role of the enzyme urease in the soil has received much study with regard to urea in the soil. Reports of its stability at temperatures under 70ºC and its dramatic increase with greater amounts of organic matter stimulated the present study on thatch effects on urea nitrogen and urease behavior. This study showed urease activities were extremely high within the thatch and aboveground tissue compared with activity in the underlying soil. This led to the conclusion that applications of urea in water or dry, where organic residue is abundant, offers greater risk of volatilization loss. Rinsing the urea into the soil was recommended to minimize this loss."
Note:"1983... Agron. J. 75:654-656."
This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Torello, W. A., and D. J. Wehner. 1984. Urea and urease in a Kentucky bluegrass turf. Green World. 14(1):p. 3.
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