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A 28-Meter Douglas-fir in a Weighing Lysimeter

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A 3.7 m diameter by 1.2 m deep soil container was constructed around the root ball of a 28 m Douglas-fir tree in a naturally regenerated stand. The container, soil, and tree weighed 28,900 kg. The weighing mechanism, consisting of 165.6 m of 6.35 cm butyl rubber tubing filled with water connected to a stand pipe, was placed under the soil container. Weight changes are detected by measuring the differential pressure between the active standpipe and a dummy standpipe. The sensitivity of the system is 630 g, equivalent to 0.06 mm of H2O. Forest Sci. 19:256-261.
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Keywords: Lysimeter; evapotranspiration

Document Type: Journal Article

Affiliations: Research Associate, Duke University

Publication date: 01 December 1973

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