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Vacuum Extractors to Assess Deep Percolation Losses and Chemical Constitutents of Soil Water¹

ABSTRACT

A vacuum extractor, consisting of a porous ceramic tube within a sheet-metal trough, has been developed to provide a quantitative measure of soil water lost by deep percolation and to provide a water sample for chemical analysis. Several of these extractors have been installed in the field and preliminary field performance is reported. Detailed laboratory evaluation is in progress.

¹ Contribution from the Agricultural Research Service, USDA, in cooperation with the Colorado State Univ. Exp. Sta.

² Agricultural Engineer and Soil Scientist, respectively, USDA-ARS, Fort Collins, Colorado.

Received for publication March 19, 1973. Accepted for publication July 10, 1973.

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