Measurement of Potential Evaporation Rates in Ecology and Silviculture with Particular Reference to the Piche Atmometer

Authors: Muelder, Dietrich W.; Tappeiner, John C.; Hansen, Jack H.

Source: Journal of Forestry, Volume 61, Number 11, 1 November 1963 , pp. 840-845(6)

Publisher: Society of American Foresters

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Abstract:

Knowledge of the drying power of the air at the plant site provides insight into important environmental conditions. Measurements of potential evaporation rates are, therefore, indispensable in ecological and silvicultural research. The Piche Atmometer lends itself to measurements in confined niches, particularly in the air-layer close to the ground. The instrument is both inexpensive and easy to operate, thus allowing simultaneous measurements at several localities. Compared to the magnitude of significant environmental differences the errors due to the shortcomings of the simple instrument are negligible. The use of the instrument is explained with examples from studies on early seedling survival in the mixed conifer type of the westside Sierra Nevada in California. Measurements at one inch above the ground, with a reference reading at 40 inches, helped decidedly in recognizing and understanding the mosaic pattern of the occurring microsite conditions. It is suggested that interested workers agree on a standardized model of the Piche Atmometer.

Document Type: Journal Article

Affiliations: Associate Specialist, School of Forestry, University of California, Berkeley

Publication date: November 1, 1963

More about this publication?
  • The Journal of Forestry is the most widely circulated scholarly forestry journal in the world. In print since 1902, the Journal has received several national awards for excellence. The mission of the Journal of Forestry is to advance the profession of forestry by keeping forest management professionals informed about significant developments and ideas in the many facets of forestry: economics, education and communication, entomology and pathology, fire, forest ecology, geospatial technologies, history, international forestry, measurements, policy, recreation, silviculture, social sciences, soils and hydrology, urban and community forestry, utilization and engineering, and wildlife management. The Journal is published bimonthly: January, March, May, July, September, and November.
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