![]() ![]() ![]() Urea and sulfur-coated urea were the least expensive soluble and slow-release N source, respectively, using dollars per pound N, dollars per acre per day, and dollars per acre per quality-day during each fertilizer cycle and annual average in Jay and Ft. Lauderdale using turfgrass response longevity and AUTRC. Natural organics were ≈6-fold more expensive than urea in Jay and Ft. ha −1 of N during the fall fertilizer cycle in Jay. ![]() Urea resulted in response longevity greater than or equal to other N sources during each season except when applied at 98 kg Turf quality ratings were recorded weekly and used to determine response longevity (days quality ≥6.0) and area under the turfgrass response curve (AUTRC). Turf quality was recorded on a scale of 1 to 9, where 1 = dead/brown turf and quality, 6 = minimal acceptable, and 9 = optimal healthy/green turf. Treatments were arranged in a split-plot design with N sources as whole plots and N rate (N applied at 49 and 98 kg Treatments included nontreated turfgrass, urea, ammonium sulfate, stabilized urea, methylene urea, ureaformaldehyde, two natural organics, sulfur-coated urea, and two polymer-coated urea fertilizers. 2018 on ‘Riley’s Super Sport’ (Celebration ®) bermudagrass ( Cynodon dactylon). 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. An improved approach could use longevity of the N source to balance the price. Price per ton and price per pound N are common price comparison methods. Determining the least expensive N source can be confusing for consumers. Numerous nitrogen (N) sources are used in turfgrass management and vary from soluble to slow-release. ![]()
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