Norflurazon adsorption and dissipation in three southern soils
| Autor: | William T. Willian, Charles E. Snipes, David C. Bridges, Robert M. Hayes, Thomas C. Mueller |
|---|---|
| Rok vydání: | 1997 |
| Předmět: |
0106 biological sciences
chemistry.chemical_classification Soil science 04 agricultural and veterinary sciences Plant Science Dissipation 01 natural sciences 010602 entomology Adsorption chemistry Loam Soil water 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Environmental science Soil horizon Organic matter Leaching (agriculture) Agronomy and Crop Science After treatment |
| Zdroj: | Weed Science. 45:301-306 |
| ISSN: | 1550-2759 0043-1745 |
| Popis: | Norflurazon adsorption and dissipation under field and laboratory conditions, and distribution within the soil profile were determined in three soils representative of cotton-growing regions of the southeastern U.S. Norflurazon adsorption was greater in soil from 0 to 8 cm in a Lexington silt loam (Tennessee) and a Beulah silt loam (Mississippi) than in a Dothan loamy sand (Georgia). Adsorption was directly related to organic matter. Norflurazon degradation under controlled conditions in soil from 0 to 8 cm from each state was not different among locations, with half-lives ranging from 63 to 167 d. Degradation at 30 C in soil from the 30- to 45- and 60- to 90-cm depths was not different among locations, and was slower at the 60- to 90-cm depth than in surface soil. Norflurazon dissipation was more rapid under field conditions than under laboratory conditions, with half-lives ranging from 7 to 79 d in the 0- to 8-cm soil horizon. Dry field conditions slowed norflurazon dissipation. Norflurazon was not detected below 15 cm in the profile in any soil, and concentrations in the 8- to 15-cm soil zone were < 36 ppbw 112 d after treatment. |
| Databáze: | OpenAIRE |
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