Apparatus for measuring the real evapotranspiration of a plant c

Details Apparatus for measuring the real evapotranspiration of a plant c Apparatus for measuring the real evapotranspiration of a plant c

1982-10-20

1986-07-15

Kreitman, Stephen A.

Measuring and testing

Gas analysis

Gas chromatography

733386, 47 58, G01N 2562

Patent

active

045998892

ABSTRACT:
Apparatus for measuring the real evapotranspiration of a plant cover, for measuring the amount of carbon dioxide exchanged between said plant cover and the atmosphere and for measuring the hydrous state of the ground around the plant cover. The apparatus includes an assembly of terminals, an electronic command and calculation unit, and a unit to store the results calculated by the electronic command and calculation unit. The apparatus permits the calculation of the evapotranspiration by the application of any one of the Bowen ratio method, the simplified direct aerodynamic method, or the simplified combined aerodynamic method.

REFERENCES:
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patent: 2900821 (1959-08-01), Rich
patent: 2915898 (1959-12-01), Van Luik, Jr.
patent: 3381409 (1968-05-01), Lamont
D. S. Munro, "A Portable Differential Psychrometer System", Journal of Applied Meteorology, vol. 19, No. 2, pp. 206-214, Feb. 1980.
G. S. Campbell, "Improved Thermocouple Psychrometers for Meas. of Soil Water Pot. in Temp. Grad.", J. Phys. E. Sci. Instr., vol. 12, No. 8, pp. 739-743, Aug. 1979.
"Revised Guidelines for Reporting Studies in Controlled Environ. Chambers", Hort Science, vol. 12(4), pp. 309-310, Aug. 1977.

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