Surface distribution of drops applied on the ground with sprayer.

Ryiuiti Higashibara, Leandro; Migliorini de Oliveira, Gustavo; Gonçalves Balan, Marcelo; de Batista Fonseca, Inês Cristina; Abi Saab, Otavio Jorge Grigoli

There are several factors that influence in the coverage percentage of the target: spray equipments, spray nozzle, adjuvants, weather conditions, soil topographic, etc. Based on this aspect, the uniformity of drop distribution on the target is the goal of the application technology. The aim of this study was to evaluate the horizontal drops distribution of a sprayer. It were distributed 396 water-sensitive papers, with a spacing of 1 m each, in a plain area of 12 x 33 m. Upon such papers was applied water through a hydraulic sprayer with 12 meters of bars. After the application, the water-sensitive papers were digitalized in a scanner and the obtained imaged analyzed the percentage of coverage by the Conta-Gotas® software. The data obtained were integrated and arranged in graphic, generating an image with five bands of coverage (0-20, 20-40, 40-60, 60-80 and 80-100%). It was verified a wide variation in the percentage of coverage along the pulverized area. The most part of the area (87.09%) had coverage between 40% and 80%. Thus, the results showed that even under appropriate operating conditions, applications with sprayer may not show uniformity.

DROPLETS; SPRAY nozzles; SOIL topography

Brazilian Journal of Applied Technology for Agricultural Science / Revista Brasileira de Tecnologia Aplicada nas Ciências Agrárias, 2013, Vol 6, Issue 1, p91

1983-6325

Academic Journal

10.5935/PAeT.V6.N1.11