Nozzles transverse distribution model development: Effect of pressure and anti drift nozzle

Abstract

The efficacy of pesticide application depends not only on the quality of pesticides but also the quality of the application. One of the factor that most influences on the applications quality, from the standpoint of mechanization, are nozzles. They applied liquid on the surface of the plant which resulting that same volume of pesticide is applied to the entire surface of the plants. To achieve this goal, nozzles must performed uniform application of liquid per unit area, or working width. The variable factor in the application of pesticides may be nozzle and operating pressure. With increasing working pressure it was obtained smaller droplets. The paper presents test of three different nozzles. Each nozzle is characterized by a flat jet with an angle of 110 o and a flow rate of 1.6 l / min at a pressure of 3 bar. Differences between each other is the way of jet disintegration. Exactly this characteristic causes that with pressure change coming to changes in the uniformity of nozzles transverse distribution. The best distribution has nozzle with a flat jet. The coefficient of variation is between roughly from 4 to 6% at the pressure application of 2 to 4 bar. Obtained mathematical model that describes changes in the coefficient of variation depending on pressure applications can be a good basis for easy harmonization parameters in the pesticide application.