| Autor: |
C. A. Hollier, R. N. Barbosa, J. L. Griffin |
| Rok vydání: |
2009 |
| Předmět: |
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| Zdroj: |
Applied Engineering in Agriculture. 25:181-184 |
| ISSN: |
1943-7838 |
| Popis: |
Field research in 2007 evaluated tracer deposition using different combinations of spray rates, vehicle speeds, and boom pressure using aerial and ground application in Louisiana. The objectives were to compare deposition and canopy penetration in soybean (Glycine max (L.) Merr.). Artificial mylar cards and a tracer (tartrazine) were used to quantify distribution and penetration. Results showed that total canopy deposition increases when spray rates are equal to or higher than 93.4 l·ha-1coupled with slower tractor speeds for ground-based systems (P < 0.05) or equal to or higher than 65.4 l·ha-1 for aerial-based systems (P < 0.0001). Regression analysis showed that air temperature and relative humidity did not influence tracer deposition during testing, but wind speed did ( r2 =0.38). Deposition throughout the canopy was highly variable; the top part of the canopy retained most of the spray regardless of application method or spray rate. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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