engleski

Dynamics and deposit of spray droplets disintegrated by the nozzles of a tractor- mounted sprayer

The article gives insight into the dynamics, deposit, and coverage of wheat leaves by spray droplets in case of three different types of TeeJet nozzles and at five different levels of spraying pressure. An average level of coverage was determined (expressed in percentage) as well as an average surface density of droplet traces (1/cm(2)) both on the upper and lower leaf sides. The quality of the deposit of disintegrated spray was established by catching droplet traces on water sensitive leaves. The highest average level of coverage was achieved in case when TeeJet 11006 nozzle was used (27.247%), and somewhat weaker results were achieved by TeeJet 11004 nozzle (24.755%) and TeeJet 11002 (22.355%). The average coverage of the lower leaf side was not satisfactory since the spray was present only in traces. The achieved coverage of the lower leaf side by TeeJet 11006 and TeeJet 11004 was 6.392% and 3.629% respectively, whereas the poorest result was achieved by TeeJet 11002 and it was 0.272%. Higher spraying levels generally resulted in a better coverage of both upper and lower leaf sides and at the same time it resulted in a higher level of droplet disintegration except for TeeJet 11002 and TeeJet 11004 but only in regard with the lower leaf side

nozzle ; leaf coverage ; droplets ; spraying

Rad je prezentiran na skupu VII. Alps-Adria Scientific Workshop, održanom od 28.04.-02.05.2008., Stara Lesna, Slovačka