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Cécile Bertin, Andy F. Senesac, Frank S. Rossi, Antonio DiTommaso, and Leslie A. Weston

objectives of this study, therefore, were to evaluate turfgrass quality and weed suppressive ability of fine-leaf fescue cultivars over a 3-year period. Based on initial evaluations, a subset of fine-leaf fescue cultivars was further evaluated in additional

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Joe E. Toler, Jason K. Higingbottom, and Lambert B. McCarty

. Turfgrass quality ratings were on a 1–10 scale with 1 denoting no live grass, 7 denoting minimal acceptable, and 10 denoting best turfgrass quality. Turfgrass color ratings were on a 1–10 scale with 1 denoting brown grass and 10 denoting uniform, dark green

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Subhrajit K. Saha, Laurie E. Trenholm, and J. Bryan Unruh

leachate volume. Turfgrass visual quality ratings were taken weekly on a scale of 1 to 9, with 9 being best, 1 being worst, and 6 being minimally acceptable turfgrass quality. Multispectral reflectance (MSR) readings were taken three times during each FC

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Gerald Henry, Rebecca Grubbs, Chase Straw, Kevin Tucker, and Jared Hoyle

The effects of drought and water conservation efforts on turfgrass quality have been well documented for arid and semiarid regions ( Culpepper et al., 2020 ; Garrot and Mancino, 1994 ; Kneebone and Pepper, 1982 ; Meyer and Gibeault, 1986

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Dana Sullivan, Jing Zhang, Alexander R. Kowalewski, Jason B. Peake, William F. Anderson, F. Clint Waltz Jr., and Brian M. Schwartz

positive effects of TE include increased chlorophyll content levels ( Ervin and Koski, 2001 ), turfgrass quality ( Jiang and Fry, 1998 ), and turfgrass performance under abiotic stress ( Ervin et al., 2002 ; McCann and Huang, 2007 ). Besides aesthetic

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Christian M. Baldwin, Haibo Liu, Lambert B. McCarty, Hong Luo, Joe Toler, and Steven H. Long

#9840; Taylor), visual turfgrass quality (TQ), clipping yield, chlorophyll concentration, root total nonstructural carbohydrates (TNC), soil bulk density, and water infiltration rates. Canopy and soil (7.6 cm depth) temperatures were recorded after each

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Karl Guillard, Richard J.M. Fitzpatrick, and Holly Burdett

management and installation parameters Intl. Turfgrass Soc. Res. J. 7 701 707 Hall, J.R. III Taylor, L.H. Shoulders, J.F. 1985 Sod strength and turfgrass quality of Kentucky bluegrass cultivars, blends and mixtures. In: F. Lemaire (ed.). Proc. 5th Intl

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Brian M. Schwartz, Wayne W. Hanna, Lisa L. Baxter, Paul L. Raymer, F. Clint Waltz, Alec R. Kowalewski, Ambika Chandra, A. Dennis Genovesi, Benjamin G. Wherley, Grady L. Miller, Susana R. Milla-Lewis, William C. Reynolds, Yanqi Wu, Dennis L. Martin, Justin Q. Moss, Michael P. Kenna, J. Bryan Unruh, Kevin E. Kenworthy, Jing Zhang, and Patricio R. Munoz

greater in DT-1 than ‘Celebration’, ‘TifGrand’, or ‘TifSport’ ( Table 3 ). In nonirrigated stress trials conducted in Tifton, GA, from 2009 to 2011, DT-1 generally maintained greater turfgrass quality and green cover than ‘TifSport’ and ‘Tifway’ from

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C.M. Baldwin, H. Liu, L.B. McCarty, W.L. Bauerle, and J.E. Toler

A 2-year greenhouse study was conducted at Clemson University, Clemson, S.C., in 2003 and 2004 to determine drought responses of six bermudagrass (Cynodon spp.) cultivars at four irrigation intervals. Cultivars selected from the 2002 National Turfgrass Evaluation Program Bermudagrass Trial were `SWI-1012', `Arizona Common', `Tift No.3', `Tifsport', `Aussie Green', and `Celebration'. Treatments included 5-, 10-, and 15-day irrigation intervals plus a control (irrigated daily). Volumetric soil water content (VSWC) and evapotranspiration (ET) rates were recorded every 3 days. Turfgrass quality (TQ) was observed weekly and root weight was measured at the end of a 6-week study. `Aussie Green' and `Celebration' produced the highest TQ rating (>7) at week 4 when watered daily. After 4 weeks of the 5-day irrigation interval, all cultivars showed unacceptable quality ratings (<7). However, `Aussie Green' and `Celebration' were able to maintain an acceptable TQ rating (7), compared to `Arizona Common' (5.1) and `Tift No.3' (5.8) at week 2 (5-day treatment). `Celebration' produced 114% and 97% greater root weight than `Tifsport' and `Aussie Green', respectively, when pooled across all irrigation treatments. At the 15-day irrigation interval treatment, six bermudagrass cultivars pooled together produced 78%, 22%, and 11% greater root weight vs. control, 5-day, and 10-day treatments, respectively. When pooled for all treatments, `Aussie Green' and `Celebration' VSWC was 5% and 7% lower than `Tift No.3', and ET rates were 26% and 30% greater than `Arizona Common'. Based on these results, irrigating bermudagrass in 5-day intervals should be carefully monitored.

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A. Fortuna, P.E. Rieke, L.W. Jacobs, B. Leinauer, and D.E. Karcher

Rapid aquatic plant growth in Michigan's smaller lakes has reduced their navigability and recreational use. Harvested aquatic weeds have posed a new waste disposal issue for municipalities. Application of lake weeds as a soil amendment on area farms was viewed as a possible waste management option that might benefit local sod producers. The objectives of this study were to 1) estimate the amount of plant-available N (PAN) released from lake weed material, 2) determine the chemical composition of aquatic plant tissues and their effect on plant-available moisture, and 3) study turfgrass response to lake weed applications using the criteria of turfgrass quality, growth, and N uptake. Rates of lake weed refuse applied to field plots were 96, 161, and 206 Mg·ha-1. Two 47-day laboratory incubations were conducted with the same rates of refuse. Relative to biosolids, the metal content of the lake weeds was low and the nutrient content high. One megagram of lake weeds contained 0.37 kg of P and 2.5 kg of K. The decay constant for the C fraction in lake weeds was 8 to 10 days and 16 days for the N fraction. Estimates of the N supplied by lake weeds (570, 960, and 1200 kg PAN/ha) were based on data from C and N incubations. Application of lake weeds significantly increased plant-available soil moisture and significantly enhanced sod establishment and turf density, resulting in decreased weed pressure. However, excess N was present at higher application rates. Management concerns during the application of lake weeds should focus on nutrient loading and the timing of plant-available N release. Depending on methods of weed harvesting, we observed that large amounts of unwanted trash present in the plant biomass could discourage use by growers. Land application of lake weed refuse could ease waste disposal problems, reduce fertilizer inputs for sod growers, and improve the moisture status of sands. Further, this information can be of value to environmental regulatory agencies in determining safe and proper use of such waste materials.