IRIS tubes were recently added to the National Technical Committee for Hydric Soils Technical Standards as an approved method for identifying anaerobic conditions in soils. Research on the effectiveness of IRIS tubes has been positive but limited geographically. The objectives of this study were to assess water table dynamics and evaluate IRIS tubes as an effective method for hydric soil identification in northeastern Illinois. The hydric soil indicators in addition to magnetic susceptibility measurements and the calculation of a darkness profile index will serve as methods used to further evaluate the hydric status of soils sampled for this study. Results showed that only one of eight soils along a transect were confirmed hydric by IRIS tubes, despite hydric morphology exhibited by all eight soil cores. Repeated IRIS tube trials over several growing seasons are necessary to capture the annual variability in water table dynamics, and research is ongoing in 2009.
|Advisor:||Konen, Michael E.|
|School:||Northern Illinois University|
|School Location:||United States -- Illinois|
|Source:||MAI 48/01M, Masters Abstracts International|
|Subjects:||Physical geography, Hydrologic sciences, Soil sciences|
|Keywords:||Hydric soil indicators, Hydric soils, IRIS tubes|
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