Design, Construction and Evaluation of Air Assisted Nozzle on Boom Sprayer

Document Type : Research Paper

Authors

1 Department of Agricultural Machinery and Mechanization, Agricultural Sciences and Natural Resources University of Khuzestan, Mollasani, Ahvaz, Iran.

2 Department of Agricultural Machinery and Mechanization, Agricultural Sciences and Natural Resources University of Khuzestan, Mollasani, Ahvaz, Iran

3 Graduated, Department of Agricultural Machinery and Mechanization, Agricultural Sciences and Natural Resources University of Khuzestan, Iran

Abstract

Abstract
Spraying is a major operation to control the bio elements that are harmful for farming products. Considering the high costs of chemical spraying and related environmental issues, the proper management is important. In the meantime, reduction in nozzle drift can be considered as one of the main factors in preventing the risk of pesticide environmental pollution, as well as reducing pesticide waste and proper spray uniformity. For this purpose, design, fabrication and evaluation of air assisted nozzle on boom sprayer was conducted using a factorial completely randomized design with three replications. The experiments were performed using three types of air assisted nozzles: air- liquid-air (ALA), liquid (L), liquid-air- liquid (LAL) at four levels of air assisted speed (0, 2, 4 and 7.5 m/s), and also four levels of wind speed (0, 2, 3 and 4 m/s). In the research, the drift, sediment, uniform spraying, volume median diameter of 50 and 90%, numerical median diameter and spraying quality indicators were evaluated. A spectrophotometry device for measurements and MATLAB and SAS 9.1 statistical software were used for analysis. Results showed that the effects of air assisted nozzle and wind speed on the drift, sediment, uniform spraying, volume median diameter of 50 and 90% and spraying quality indicator were significant (). Also results indicated that the third type of nozzle (LAL) at 4 m/s assistant air speed and 4 m/s wind speed had the highest sediment (144.87 l/ha) and the lowest drift (0.06%), while the lowest sediment (31.16 l/ha) and the highest drift (0.69%) were found for the third nozzle (LAL) without assistant air (as control group) and in 2 m/s wind speed. The minimum coefficient of variation (0.42 the most uniformity in spraying) was related to the third nozzle with 4 m/s assistant air speed and 4 m/s wind speed, but the maximum coefficient of variation (4.08) belonged to the first nozzle with 7.5 m/s assistant air speed  but without any blowing wind.
 

Keywords

References

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Agricultural Mechanization
Volume 4, Issue 2
November 2018
Pages 13-26

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  • Receive Date: 20 November 2019
  • Accept Date: 20 November 2019

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