Spatial and Temporal Variability of Herbicides in a Claypan Soil Watershed
| Autor: | Fessehaie Ghidey, Robert N. Lerch, E. E. Alberts |
|---|---|
| Rok vydání: | 1997 |
| Předmět: |
Hydrology
Environmental Engineering Soil test Alachlor Management Monitoring Policy and Law Pollution Claypan chemistry.chemical_compound Agronomy chemistry Soil pH Cation-exchange capacity Environmental science Spatial variability Atrazine Surface runoff Waste Management and Disposal Water Science and Technology |
| Zdroj: | Journal of Environmental Quality. 26:1555-1563 |
| ISSN: | 1537-2537 0047-2425 |
| DOI: | 10.2134/jeq1997.00472425002600060015x |
| Popis: | The spatial and temporal variability of herbicides during the growing season were studied on a 35-ha watershed located in the cIaypan soil region of north-central Missouri. Soil samples were collected from the 0- to 5-em soil depth in 1993, and 0- to 5-, 5- to 10-, and 10totS-em soil depths in 1995 and analyzed for atrazine (2-chloro-4ethylamino-6-isopropylamino-s-triazine) and alachlor (2-chloro-N-(2, 6-diethl-N-(methoxymethyl) acetanilide) concentrations. The effects of rainfall, topography, soil pH, cation exchange capacity (CEC), and organic matter (OM) content on the spatial distribution of herbicides were evaluated. There was no spatial dependency between samples taken immediately after herbicide application; however, spatial dependency was observed in the following sampling periods. During the year |
| Databáze: | OpenAIRE |
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