Measuring and Mapping Patterns of Soil Erosion and Deposition Related to Soil Carbonate Concentrations Under Agricultural Management
| Autor: | Robert H. Erskine, Timothy R. Green, L. A. Sherrod |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Soil test
General Immunology and Microbiology General Chemical Engineering General Neuroscience Elevation Carbonates Soil chemistry Soil science Agriculture 04 agricultural and veterinary sciences 010501 environmental sciences 01 natural sciences Deposition (geology) General Biochemistry Genetics and Molecular Biology Soil Soil functions Digital soil mapping 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Environmental science Pedology Digital elevation model Environmental Sciences 0105 earth and related environmental sciences |
| Zdroj: | Journal of visualized experiments : JoVE. (127) |
| ISSN: | 1940-087X |
| Popis: | Spatial patterns of soil erosion and deposition can be inferred from differences in ground elevation mapped at appropriate time increments. Such changes in elevation are related to changes in near-surface soil carbonate (CaCO(3)) profiles. The objective is to describe a simple conceptual model and detailed protocol for repeatable field and laboratory measurements of these quantities. Here, accurate elevation is measured using a ground-based differential global positioning system (GPS); other data acquisition methods could be applied to the same basic method. Soil samples are collected from prescribed depth intervals and analyzed in the lab using an efficient and precise modified pressure-calcimeter method for quantitative analysis of inorganic carbon concentration. Standard statistical methods are applied to point data, and representative results show significant correlations between changes in soil surface layer CaCO(3 )and changes in elevation consistent with the conceptual model; CaCO(3 )generally decreased in depositional areas and increased in erosional areas. Maps are derived from point measurements of elevation and soil CaCO(3) to aid analyses. A map of erosional and depositional patterns at the study site, a rain-fed winter wheat field cropped in alternating wheat-fallow strips, shows the interacting effects of water and wind erosion affected by management and topography. Alternative sampling methods and depth intervals are discussed and recommended for future work relating soil erosion and deposition to soil CaCO(3). |
| Databáze: | OpenAIRE |
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