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Publication Type:
| Proceedings |
Author(s): | Howell, T. A.;
Evett, S. R.;
Schneider, A. D.;
Dusek, D. A.;
Copeland, K. S. |
Author Affiliation: | Howell: Research Leader, Agricultural Engineer; Evett: Soil Scientist; Schneider: Agricultural Engineer; Dusek: Agronomist; and Copeland: Soil Scientist, USDA-ARS, Conservation and Production Research Laboratory, Bushland, Texas |
Title: | Irrigated fescue grass ET compared with calculated reference grass ET |
Section: | Irrigation scheduling I: Standardizing reference ET equations Other records with the "Irrigation scheduling I: Standardizing reference ET equations" Section
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Meeting Info.: | Phoenix, Arizona: November 14-16, 2000 |
Source: | National Irrigation Symposium: Proceedings of the 4th Decennial Symposium. 2000, p. 228-242. |
Publishing Information: | St. Joseph, Michigan: American Society of Agricultural Engineers |
# of Pages: | 15 |
Keywords: | TIC Keywords: Irrigation; Festuca arundinacea; Evapotranspiration; Water use; Lysimetry; Irrigation scheduling; Subsurface irrigation; Drip irrigation; Models
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Abstract/Contents: | "Cool-season, short, and well-watered grass is the world-wide standard reference for crop evapotranspiration (ET) research and practice. Fescue grass (Fetuca arundinacea Schreb.) was grown at Bushland, TX since 1995, and its water use measured with a monolithic, weighing lysimeter. The grass was mowed (to 0.11 m) and irrigated frequently and managed for vigorous growth. It was irrigated with a subsurface drip irrigation (SDI) system. Data were analyzed for the period 1 July 1995 through December 1999 that included a wide diversity in climatic regimes. Several grass reference ET models including FAO-56 Penman-Monteith (PM), ASCE PM, FAO-24 Penman, Kimberly-96 Penman, SCS-93 PM, Penman-48, and the Hargreaves-Samani equations all for grass; the ASCE PM and Kimberly-82 Penman equations for alfalfa (Medicago sativa L.); and the general Priestley-Taylor equation for non-advected conditions were evaluated and contrasted with the daily grass ET measurements. Measured fescue daily ET rates exceeded 10 mm d-1 occasionally. The FAO-56 and ASCE Penman Monteith equations tended to over-estimate during spring and fall and under-estimate during summer and especially on high ET days (> 8 mm d-1). The older Penman formula ET correlated well to the measured daily data. The Hargreaves-Samani and Priestley-Taylor equations substantially under estimated grass ET in this environment." |
Language: | English |
References: | 42 |
Note: | Pictures, b/w Tables Graphs |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Howell, T. A., S. R. Evett, A. D. Schneider, D. A. Dusek, and K. S. Copeland. 2000. Irrigated fescue grass ET compared with calculated reference grass ET. p. 228-242. In National Irrigation Symposium: Proceedings of the 4th Decennial Symposium. Phoenix, Arizona: November 14-16, 2000. St. Joseph, Michigan: American Society of Agricultural Engineers. |
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