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| Web URL(s): | https://dl.sciencesocieties.org/publications/aj/pdfs/75/3/AJ0750030419
Last checked: 12/08/2016
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| Publication Type:
| Refereed |
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| Author(s): | Johns, D.;
Beard, J. B.;
Van Bavel, C. H. M. |
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| Author Affiliation: | Johns: Postdoctoral Fellow; Beard and Van Bavel: Professors, Department of Soil and Crop Sciences, Texas A&M University, College Station, Texas |
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| Title: | Resistances to evapotranspiration from a St. Augustinegrass turf canopy |
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| Source: | Agronomy Journal. Vol. 75, No. 3, May/June 1983, p. 419-422. |
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| Publishing Information: | Madison, WI: American Society of Agronomy |
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| # of Pages: | 4 |
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| Keywords: | TIC Keywords: Evapotranspiration; Stenotaphrum secundatum; Environmental factors; Canopy resistance; Mowing height; Dewpoint; Air temperature
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| Abstract/Contents: | "A controlled environment study of evapotranspiration from St. Augustinegrass [Stenotaphrum secundatum (Walt.) Kuntze] turf showed that, under adequately watered conditions, evapotranspiration was influenced to a greater extent by environmental factors which were external to the plants rather than by disposition of leaf stomata. Using an Ohm's Law analogue to define a resistance network for the turfgrass canopy, magnitudes of resistances to water loss were measured and compared. Internal resistance was defined as aggregate diffusive resistance of the foliage and was determined from porometer measurements of diffusive resistance of leaves. External resistance was defined as the sum of aerodynamic resistance and resistance to air mass exchange within the canopy and was measured by three different methods. Internal resistance was found to be only one-fourth to one-half the external resistance. Under wind speed conditions of 0.6 m/sec, actual evapotranspiration rates of St. Augustinegrass were only slightly lower than potential evapotranspiration rates. It is concluded that chemical or genetic control of stomatal resistance would not result in appreciable savings of irrigation water." |
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| Language: | English |
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| References: | 17 |
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| See Also: | See also related manuscript, Second Year Progress Report Concerning Physiological Investigations in Developing Water Conserving, Minimal Maintenance Turfgrasses and Cultural Systems: Volume II, 1985, R=217425. R=217425 |
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| Note: | Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Johns, D., J. B. Beard, and C. H. M. Van Bavel. 1983. Resistances to evapotranspiration from a St. Augustinegrass turf canopy. Agron. J. 75(3):p. 419-422. |
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| Web URL(s):
https://dl.sciencesocieties.org/publications/aj/pdfs/75/3/AJ0750030419
Last checked: 12/08/2016
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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MSU catalog number: S 22 .A45 |
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