Abstract
Reducing soil conditions may impact more static properties like soil morphology, as well as more dynamic soil chemical properties and microbial ecology. Identifying reducing conditions is especially important when evaluating wetland soil systems. Indicator of Reduction in Soils (IRIS) tubes have been approved by the National Technical Committee for Hydric Soils (NTCHS) as a method to identify reducing soil conditions. Recently, a new development in IRIS technology utilizing flexible films has emerged. IRIS films are strips of vinyl sheeting painted with iron- or manganeseoxide paint. The films are intended to simplify field work and facilitate acquisition and computer analysis of IRIS images. This mesocosm study demonstrates that IRIS films perform comparably to IRIS tubes and accurately document reducing soil conditions.
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