Nozzle classification system in Japan based on the relative spray ...

Drift Potential Index
Reduction Percentage, %
150.00
100.00
50.00
0.00
-50.00
ES05-0.3
ES06-0.3
ES07-0.3
ES08-0.3
ES09-0.3
ES10-0.3
ES11-0.3
ES05-0.4
ES06-0.4
ES07-0.4
ES08-0.4
ES09-0.4
ES10-0.4
ES11-0.4
-100.00
05 06 07 08 09 10 11
FIGURE 7: DIXRP values obta<strong>in</strong>ed under different nozzle-pressure comb<strong>in</strong>ations of ES series
nozzle with the nozzle pressure of 1.5MPa
Based on the <strong>classification</strong> method of the spray nozzle drift adopted by BBA, the ES series
nozzles (except ES05) with a nozzle height of 0.3m and 0.4m have drift reduction ability over
50%. Moreover, the drift reduction abilities of some ES nozzles could be over 90% with the
nozzle height of 0.3m.
4. Conclusions
The w<strong>in</strong>d tunnel tests for the relative drift spray of the nozzle used <strong>in</strong> <strong>Japan</strong> were carried out.
The results showed that the nozzle size and height had relatively obvious <strong>in</strong>fluence on the
DIXRP values while the relationship between the DIXRP value and the nozzle pressure was
not obta<strong>in</strong>ed. The ma<strong>in</strong> reason could be the relatively steady droplet size of the ES nozzles.
Based on the <strong>classification</strong> method adopted by BBA (Herbst, 2001), the ES nozzles (except
ES05) could be considered as the drift reduction nozzle with a drift reduction ability over 50%.
Additionally, some of the ES nozzles operated under a nozzle height of 0.3m could be
classified as the 90% reduction group <strong>in</strong> this study.
5. References
Herbst A. (2001). A method to determ<strong>in</strong>e spray drift potential from nozzles and its l<strong>in</strong>k to buffer
zone restrictions. ASAE International Meet<strong>in</strong>g Paper No. 01-1047, Sacramento, California.
<strong>Japan</strong> Plant Protection Association (2009). Menu of technical countermeasures for spray drift.
Nuyttens, D., De Schampheleire, M., Baetens, K., Brusselman, E., Dekeyser, D., Verboven, P.
(2010). Drift from field crop sprayers us<strong>in</strong>g an <strong>in</strong>tegrated approach: results of a 5 year study.
ASABE International Meet<strong>in</strong>g Paper No. 1009017, Pittsburgh, Pennsylvania.