| Autor: |
Fajardo, Gabriela Isabel |
| Přispěvatelé: |
Crop and Soil Environmental Sciences, Daniels, W. Lee, Aust, W. Michael, Perry, James E. III, Whittecar, G. Richard, Galbraith, John M. |
| Rok vydání: |
2006 |
| Předmět: |
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| Popis: |
In 1998, the Virginia Department of Transportation (VDOT) adopted standards for soil handling and amendments to improve created non-tidal wetland soil conditions. This study was conducted in sites where these new reconstruction practices were supposedly being implemented. Specific objectives were (i) to determine the relative effects of soil reconstruction practices on mitigation site soils, (ii) to assess the degree to which hydric soil indicators were present, and (iii) to evaluate the relative edaphic potential of mitigation site soils. Soil physical, chemical and morphological properties were analyzed in ten mitigation wetlands located in Virginia's Piedmont and Coastal Plain. Surface soil pH was high due to liming, although some sites demonstrated low subsoil pH, indicating the presence of sulfidic materials. Nutrient levels varied, while C:N ratios were low (50%), which may negatively affect other soil properties. Nine sites had confirmed Hydric Soil Indicators, with their occurrence in a site as high as 70%. Soil reconstruction methods need to incorporate higher organic amendment rates and/or routine disking/ripping practices to improve mitigation wetland soil conditions. Master of Science |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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