Influence of organic fertilizer application on pendimethalin volatilization and persistence in soil
Laboratory studies were undertaken to evaluate the influence of fertilizers on pendimethalin volatilization and persistence in soil. Various organic fertilizers such as liquid humic substances and urea were used at doses of 100 L/ha or 170 kg of N/ha, respectively. Herbicide residues were determined in air, soil solution, and soil samples by GC-ECD; the recovery of pendimethalin from spiked fertilized or control samples was found to be 81-103%. Liquid humic fertilizers increased pendimethalin dissipation during the first part of the assay, although 4 months after application, herbicide levels were similar to those observed in unfertilized soil. Fertilization of soil with urea decreased, in general, pendimethalin volatilization but increased herbicide levels in soil solution and persistence in soil, with a pendimethalin half-life -70% higher than that found in unfertilized soil.
| Main Authors: | , |
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| Format: | journal article biblioteca |
| Language: | eng |
| Published: |
2003
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| Online Access: | http://hdl.handle.net/20.500.12792/1638 |
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