Hydrology and morphology of a toposequence of three Claypan soils in Central Texas /
analyze the Silawa-Rader-Edge toposequence to determine which
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| Format: | Thesis eBook |
| Language: | English |
| Published: |
[Place of publication not identified] :
[publisher not identified] ;
1994.
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| Subjects: | |
| Online Access: | Link to OAKTrust copy |
| Summary: | analyze the Silawa-Rader-Edge toposequence to determine which and chemical characterization, x-ray diffraction, and and permanently installed Eli electrodes. Redoximorphic and appeared to be borderline between aquic (as classified) and Aquic conditions are defined in terms of saturation and below BC horizon upper boundary, at 153 cm, were relicts. chroma colors and few nodules in Edge were also relict chroma colors in Silawa reflected current well drained conditions which were confirmed by field monitoring. The Fe- contemporary aquic conditions and which are relict features. current as well as previous aquic conditions, while features designation of aquic or oxyaquic subgroup for Rader hinges on different degrees of saturation and reduction. The during the study period. Thus, Rader met the requirements each pedon had a few characteristics outside the range of the Eh readings, Rader appeared to have sufficient periods of either transported with the terrace deposit or formed in elemental analysis. None of the three soils studied had a established series taxonomic placement. The Rader site evaluated for redoximorphic features and actual current features are complicated by the presence of relict features features from previous wetter environments and did not for episaturation. Water also perched above 60 cm for Ground water table within 5 meters of the surface. The high in some areas. In this study three Alfisols forming a mass to meet aquic condition requirements or reduction in measured at several depths with piezometers, tensiometers, Mn nodules and concretions in Silawa were relict features moisture conditions. The purpose of this study was to only some microsites is sufficient. The aquic conditions other features were described in the field and from thin oxyaquic sub-groups. There were significant microsite pedons studied had good evidence for argillic horizons, but perched water table at I meter for 6 to 7 months each year place during a previous wetter moisture regime. The low Rader and tensionieters and Eh electrodes as in all three redoximorphic fealures in these soils are associated with redoximorphic features within perched water tables reflected redoximorphic features. Interpretations of redoximorphic reduction in some microsites to mobilize Fe. Therefore, reduction, but they are often evaluated based on soil reflect current well drained conditions. in Rader there was a Saturation, matric potential, and redox potential were section of the most recent Key to taxonomy (Soil Survey sections. Supporting laboratory analyses included physical shorter periods immediately following rainfall events. From Silawa, Rader, and Edge series were evaluated. All three soils. Replicates often indicated similar trends but Staff, 1992) does not address this issue. Taxonomic classifications of the three pedons representing toposequence in the Claypan Major Land Resource Area were variations indicated by replicate readinos for piezometers in whether reduction is required throughout most of the soil |
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| Item Description: | "Major subject: Soil Science". Vita. |
| Physical Description: | xii, 148 leaves : illustrations ; 28 cm. Also available online. |
| Bibliography: | Includes bibliographical references. |