Full TGIF Record # 310232
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Web URL(s):https://scisoc.confex.com/crops/2019am/meetingapp.cgi/Paper/118210
    Last checked: 01/30/2020
Publication Type:
Content Type:Abstract or Summary only
Author(s):Shaddox, Travis W.; Unruh, J. Bryan
Author Affiliation:Shaddox: Fort Lauderdale Research and Education Center, University of Kentucky, Lexington, KY; Unruh: Environmental Horticulture, West Florida Research & Education Center, Jay, FL, University of Florida
Title:Determining nitrogen fertilizer cost using turfgrass response
Section:C05 turfgrass science
Other records with the "C05 turfgrass science" Section

Turf ecology and management oral II: Soil, water, plant nutrition, and biotic stress (includes student competition)
Other records with the "Turf ecology and management oral II: Soil, water, plant nutrition, and biotic stress (includes student competition)" Section
Meeting Info.:San Antonio, Texas: November 10-13, 2019
Source:ASA, CSSA and SSSA International Annual Meetings. 2019, p. 118210.
Publishing Information:[Madison, Wisconsin]: [American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America]
# of Pages:1
Keywords:TIC Keywords: Cost comparison; Cost efficiency; Fertilizer costs; Fertilizer evaluation; Nitrogen fertilizers
Abstract/Contents:"Numerous nitrogen (N) sources are used in turfgrass management and vary from soluble to slow-release. Determining the least expensive N source can be confusing for consumers. Price tonne-1 and price kg-1 N are common price comparison methods. A newer method uses release longevity of the N source to balance the price. Because N sources release N at differing rates, using a method that includes turfgrass response may be a more effective price comparison method. The objective of this study was to determine the longevity of turfgrass response to N sources and to determine the cost to achieve such responses. This study was conducted in Ft. Lauderdale and Jay, FL from Jan. 1 through Dec. 31 of 2018. Treatments included untreated turfgrass, urea, ammonium sulfate, UFlexx, methylene urea, ureaformaldehyde, a municipal biosolid, milorganite, sulfur-coated urea, Duration-90, and Polyon-42. Treatments were arranged in a split-plot design with N rate (49 and 98 kg N ha-1 4 mo-1) as whole plots and N sources as subplots using four replications. Turf quality ratings were recorded weekly and used to determine response longevity (days quality ≥ 6.0) and area under the turf response curve (AUTRC). Response longevity was similar among N sources in Jay and Ft. Lauderdale. Urea resulted in AUTRC ≥ other N sources in Jay and Ft. Lauderdale. Urea resulted in $ ha-1 d-1 and $ ha-1 quality-d-1 ≤ other N sources during each fertilizer cycle in both locations. In Jay, urea cost $2.68 ha-1 d-1 and $1.35 ha-1 quality-d-1 whereas, in Ft. Lauderdale, urea cost $1.56 ha-1 d-1 and $0.86 ha-1 quality-d-1. Regression of $ kg-1 N with $ ha-1 d-1 and with $ ha-1 quality-d-1 resulted in R2 of 0.46 (P < 0.001) and 0.63 (P < 0.001), respectively, indicating a moderate relationship between these cost measurement methods. Regression of $ per kg-1 N with turf response longevity and AUTRC determined these variables were unrelated (P=0.96 and P=0.76, respectively). This study found no evidence that using turfgrass response longevity was a more effective method of determining fertilizer cost than $ kg-1 N."
See Also:See also related article "Nitrogen fertilizer costs and turfgrass response: Comparing nitrogen fertilizer costs based upon the longevity of turfgrass response has not been confirmed as an accurate method" Golf Course Management, 89(8) August 2021, p. 58, R=315701. R=315701
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Shaddox, T. W., and J. B. Unruh. 2019. Determining nitrogen fertilizer cost using turfgrass response. Agron. Abr. p. 118210.
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    Last checked: 01/30/2020
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