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Lysimeters Without Edge Flow: An Improved Design and Sampling Procedure

Department of Soil Science, Lincoln Univ., Canterbury, New Zealand

* Corresponding author.

ABSTRACT

A description is given of a modified lysimeter design and sampling procedure designed to prevent edge flow from occuring in large soil monolith lysimeters. An internal cutting ring at the base of the lysimeter casing produced a small annular gap between the soil monolith and the wall of the casing. This gap was filled with liquefied petrolatum, which provided a water-tight seal around the edge of the lysimeter. Water and solutes were unable to leak between the monolith and casing. The use of petrolatum as a sealant is suitable for water-flux and nutrient-leaching studies, but is not suitable for pesticide studies.

Received for publication October 7, 1991.

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