Full TGIF Record # 309475
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Web URL(s):https://scisoc.confex.com/scisoc/2019am/meetingapp.cgi/Paper/118044
    Last checked: 11/27/2019
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Publication Type:
Content Type:Abstract or Summary only
Author(s):Kopec, David
Author Affiliation:The School of Plant Sciences, University of Arizona (Retired), Tucson, AZ
Title:Turfgrass water use and conservation
Section:Historical perspective
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C05 turfgrass science
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Special session symposium - Turfgrass to turfgrass science - Dedicated in memory to Dr. James B. Beard (24 September 1935 to 14 May 2018)
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Meeting Info.:San Antonio, Texas: November 10-13, 2019
Source:ASA, CSSA and SSSA International Annual Meetings. 2019, p. 118044.
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: C-3 plant; C-4 plant; Evapotranspiration; Evapotranspiration rate; Physiological responses; Species evaluation; Water conservation; Water use
Subjects' Names:Beard, J. B.
Abstract/Contents:"To set the stages for scientists to address turfgrass water use issues and novel "water saving" research, three major areas of research, each designed in a logical progression were put forth by J.B. Beard, so progress could be made by researchers for public benefit relative to turfgrass water use and irrigation. The initial research using gravimetric lysimeters, determined the grass water use (or grass ET), when soil moisture was not limiting (units of mm/day). Total ET (summed over time) was thus referred to as the Consumptive Water Use (CWU), expressed in mm, or inches per week, month or year. Such information led to some of the initial publications showing both inter and intra-species differences in ET rate (and thus CWU) which served as the basis for grass selection, irrigation design and administrative water resource allocation recommendations. Such early ET work showed that C4 grasses generally have lower ET rates than C3 turfgrasses, which now has inherent application considerations of increasing importance. The second scientific application of the grass ET studies was the use of grass crop coefficients (Kc) for irrigation purposes. Since daily ET(0) X Kc-grass yields the estimated soil moisture replacement value (depth of applied irrigation), PC or Smart Controllers now dynamically determine irrigation head run times, based on near real time ET(0). Thirdly, J.B. Beard realized that turfgasses species and even cultivars most likely have some capability to variably respond to differential amounts of applied water that are less than the ET grass of the respective well-watered turfs. This is usually structured as plant responses to applied water at various ET(0) replacement levels, essentially being one form of deficit irrigation. Such experimental designs allow for suitable and acceptable turf responses to be quantified, along with joint measurements of plant physiological responses such as leaf temperature, modulus of elasticity, osmoregulation, stress activated enzymes, CHO partitioning and enhance root and/or maintenance of acceptable R/S ratios. Lastly, J.B. Beard realized that uniformity in "drought and water use terminology" was necessary so that plant response mechanisms could be discussed in terms relative to the components of overall drought resistance."
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Kopec, D. 2019. Turfgrass water use and conservation. Agron. Abr. p. 118044.
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