Search Results - "Dugas, W.A"

Long-term measurements of CO2 flux and evapotranspiration in a Chihuahuan desert grassland by Mielnick, P., Dugas, W.A., Mitchell, K., Havstad, K.

“…We measured CO2 and evapotranspiration (ET) fluxes above a Chihuahuan desert grassland from 1996 through 2001. Averaged across six years, this ecosystem was a…”
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Carbon dioxide fluxes over bermudagrass, native prairie, and sorghum by Dugas, W.A, Heuer, M.L, Mayeux, H.S

“…The Bowen ratio/energy balance (BREB) method was used to measure 30 min water vapor and carbon dioxide (CO 2) fluxes over three fields dominated by different C…”
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Chamber and micrometeorological measurements of CO2 and H2O fluxes for three C4 grasses by Dugas, W.A., Reicosky, D.C., Kiniry, J.R.

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Energy flux measurements in a sheltered lemon orchard by Daamen, Carl C., Dugas, W.A., Prendergast, P.T., Judd, M.J., McNaughton, K.G.

“…Orchards and many other land surface types have vegetation that does not completely cover the underlying ground surface. For these land surfaces there are at…”
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Stem flow and porometer measurements of transpiration from honey mesquite (Prosopis glandulosa) by Ansley, R.J., Dugas, W.A., Heuer, M.L., Trevino, B.A.

“…The objective of this study was to compare stem flow and porometer methods of measuring transpiration of honey mesquite (Prosopis glandulosa) trees on a…”
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Tillage-induced soil carbon dioxide loss from different cropping systems by Reicosky, D.C., Dugas, W.A., Torbert, H.A.

“…Tillage of soils often decreases soil organic matter content and increases the flux of carbon dioxide (CO 2) from soils. Our objectives were (1) to measure…”
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Carbon dioxide fluxes over a northern, semiarid, mixed-grass prairie by Frank, A.B, Dugas, W.A

“…Temperate grassland ecosystems are an important component of the global carbon (C) cycle. The Bowen ratio/energy balance (BREB) technique was used to measure…”
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C₃-C₄ composition and prior carbon dioxide treatment regulate the response of grassland carbon and water fluxes to carbon dioxide by POLLEY, H.W, DUGAS, W.A, MIELNICK, P.C, JOHNSON, H.B

“…Plants usually respond to carbon dioxide (CO2) enrichment by increasing photosynthesis and reducing transpiration, but these initial responses to CO2 may not…”
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Effect of removal of Juniperus ashei on evapotranspiration and runoff in the Seco Creek watershed by Dugas, W.A. (Texas Agricultural Experiment Station, Temple.), Hicks, R.A, Wright, P

“…The water balance of a watershed may be affected by replacing deep-rooted woody species with shallow-rooted herbaceous vegetation. The objective of this study…”
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Transpiration from sorghum and soybean growing under ambient and elevated CO 2 concentrations by Dugas, W.A., Prior, S.A., Rogers, H.H.

“…The increasing concentration of carbon dioxide in the atmosphere ([CO 2]) has several direct effects on plants and these effects may be different for C 3 and C…”
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Chamber and micrometeorological measurements of CO 2 and H 2O fluxes for three C 4 grasses by Dugas, W.A., Reicosky, D.C., Kiniry, J.R.

“…Accurate measurements of surface fluxes of carbon dioxide (CO 2) and water (H 2O) are important for several reasons and can be made using several types of…”
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Transpiration from sorghum and soybean growing under ambient and elevated CO2 concentrations by Dugas, W.A., Prior, S.A., Rogers, H.H.

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Evaluating canopy temperature-based indices for irrigation scheduling by Stockle, C.O. (Washington State Univ., Pullman (USA). Agricultural Engineering Dept.), Dugas, W.A

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Effects of soil type on soybean crop water use in weighing lysimeters: II. Root growth, soil water extraction and water-table contributions by Dugas, W.A., Meyer, W.S., Barrs, H.D., Fleetwood, R.J.

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Effects of soil type on soybean crop water use in weighing lysimeters: I. Evaporation by Meyer, W.S., Dugas, W.A., Barrs, H.D., Smith, R.C.G., Fleetwood, R.J.

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Estimating ashe juniper leaf area from tree and stem characteristics by Hicks, R.A. (Texas AandM University, Temple.), Dugas, W.A

“…Ashe juniper (Juniperus ashei Buchh.) is increasing in density and areal coverage on the Edwards Plateau of Texas. This is causing changes in community leaf…”
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Evaporation from rangeland with and without honey mesquite by Dugas, W.A. (Texas Agricultural Experiment Station, Temple), Mayeux, H.S. Jr

“…The Bowen ratio/energy balance technique was used to estimate evaporation (E) from honey mesquite (Prosopis glandulosa Torr. var. glandulosa) as the difference…”
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Diurnal measurements of honey mesquite transpiration using stem flow gauges by Dugas, W.A. (Texas Agricultural Experiment Station, Temple, TX), Heuer, M.L, Mayeux, H.S

“…Honey mesquite (Prosopis glandulosa Torr. var. glandulosa) stem flow was measured on days with contrasting environmental conditions during the 1989 growing…”
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