Comparison of PRZM and GLEAMS Computer Model Predictions with Field Data for Fluometuron and Norflurazon Behavior in Soil
| Autor: | David C. Bridges, Charles E. Snipes, Thomas C. Mueller, Robert M. Hayes, William T. Willian |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
0106 biological sciences
Inceptisol Fluometuron Field experiment Soil science 04 agricultural and veterinary sciences Plant Science Pesticide 01 natural sciences Soil contamination 010602 entomology chemistry.chemical_compound chemistry Alfisol Soil water 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Environmental science DNS root zone Agronomy and Crop Science |
| Zdroj: | Weed Technology. 13:561-570 |
| ISSN: | 1550-2740 0890-037X |
| Popis: | The ability of the pesticide root zone model (PRZM) and the groundwater-loading effects of agricultural management systems (GLEAMS) model to predict movement of two herbicides in soil was evaluated using site-specific environmental data from sites in three states. Predictions of herbicide movement with site-specific data were compared to predictions using more generalized database soil and pesticide data within each model. Field experiments examined fluometuron and norflurazon movement in three soils representative of the cotton-growing regions of the southeastern United States. In comparing the use of site-specific vs. database values, the small increase in accuracy using site-specific inputs would not justify the large cost to obtain the data. The databases for each model gave predictions similar to those using the site-specific numbers. Both the PRZM and the GLEAMS model had similar accuracy levels in predicting the presence of fluometuron or norflurazon present in three surface soils, although each model tended to overpredict movement and total herbicide concentration, especially at lower herbicide concentrations. At higher herbicide concentrations, prediction accuracy was less than that probably needed to predict agronomically relevant herbicide concentrations in surface soils. |
| Databáze: | OpenAIRE |
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