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The objective of this project is to determine grass species and variety tolerance without irrigation in the event of a 60-day drought in San Antonio, Texas. This paper will discuss the first year data from a two-year research project. Grasses will be evaluated in 2006 for 60-day drought survival in four inches of soil media underlain with an impervious barrier, and non-limiting soil depth. Twenty-five turfgrasses were established September 20, 2005 in San Antonio Texas, by transplanting washed sod into 1.22 square meter plots. The entries were arranged in a randomized split-block design with four replications. The grass varieties will be exposed to a 60-day drought with the aid of an on-site automated rain out shelter beginning June 29, 2006. An on-site weather station will be used to evaluate meteorological conditions throughout the study period. Grasses will be allowed to recover for a 60-day period, following the drought treatment, to determine drought survival and recovery rate. Grasses under evaluation include: Celebration, Common, GN-1, Grimes EXP, Premier, TexTurf, TifSport, and Tifway (419) bermudagrass; Amerishade, Common, Delmar, Floratam, Palmetto, Raleigh, and Sapphire St. Augustinegrass; Cavalier, El Toro, Emerald, Empire, Jamur, Palisades, Y-2, Zeon, and Zorro Zoysiagrass; and 609 buffalograss. Turf quality, density, color, leaf firing, and dormancy measurements, during the drought and recovery periods, will be discussed.
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