Spray Deposition from a Row-Crop Airblast Sprayer

Carpenter, T. G.; Reichard, D. L.; Khan, A. S.

doi:10.13031/2013.33932

Cited by 3 publications

(4 citation statements)

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“…The computer simulation will calculate the coefficient of variation (CV) for multiple swath widths. The CV is an index of the uniformity of spray deposits across the swath width and represents the degree of variation in deposition from the mean [29][30][31][32]. An acceptable swath width is one where the CV ≤ 25%.…”

Section: Determination Of Spray Pattern and Effective Swathmentioning

confidence: 99%

Payload Capacities of Remotely Piloted Aerial Application Systems Affect Spray Pattern and Effective Swath

Martin

Latheef

2022

Drones

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Production agriculture has recently witnessed exponential growth in the use of UAS technology to obtain site-specific, real-time spectral reflectance data for the management of spatial and temporal variability in agricultural ecosystems. The integration of this novel technology and remotely piloted aerial application systems (RPAASs) for pest management requires data curation on spray pattern uniformity, droplet distribution and the operational factors governing such data. The effects of application height and ground speed on spray pattern uniformity and droplet spectra characteristics for four commercially available RPAAS platforms configured with four different payload capacities (5, 10, 15 and 20 L) and factory-supplied nozzles were investigated. Spray pattern was determined by a cotton string deposition analysis system. Spray droplets captured on water-sensitive paper cards were analyzed using a computer-based scanner system. The test results indicated that each RPAAS platform of varying payload capacity was able to produce an acceptable spray pattern. As the payload capacity increased, so did the effective swath. However, the effective swath was comparable between 15 and 20 L units. The theoretical spray application rate decreased with ground speed. The fundamental data reported here may provide guidance to aerial applicators and help in the furtherance of RPAASs as an effective pest management tool.

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Section: Determination Of Spray Pattern and Effective Swathmentioning

confidence: 99%

Payload Capacities of Remotely Piloted Aerial Application Systems Affect Spray Pattern and Effective Swath

Martin

Latheef

2022

Drones

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“…The effective swath was determined by choosing the widest swath with a coefficient of variation (CV) less than or equal to 25%. The CV is a statistical index of the uniformity of spray deposits across the swath width and is the standard metric for spray swath uniformity from aerially applied materials [13,14]. Five simulated racetrack passes were used for this analysis.…”

Section: Determination Of Spray Pattern and Effective Swathmentioning

confidence: 99%

Effect of Application Height and Ground Speed on Spray Pattern and Droplet Spectra from Remotely Piloted Aerial Application Systems

Martin

Woldt

Latheef

2019

Drones

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The objectives of this study were to characterize the effects of operational factors on spray application parameters for remotely piloted aerial application systems (RPAAS). The effects of application height and ground speed on spray pattern uniformity and droplet spectra characteristics were investigated for two RPAAS (DJI model MG-1 and HSE V6A) delivery vehicles equipped with original equipment manufacturer (OEM) nozzles. A spray mixture of tap water and fluorescent dye was applied at three different application heights in conjunction with four different ground speeds over the center line of a cotton string, suspended 1 m above ground. Fluorometric assessment of spray deposits on cotton strings and spray droplets captured on water-sensitive paper samplers described spray pattern and droplet spectra, respectively. Effective swath was determined based on the widest spray swath with a coefficient of variation (CV) ≤ 25%. Regardless of ground speed, application heights of 2 and 3 m yielded the largest effective swath for the MG-1. Neither application height nor ground speed significantly influenced effective swath for the V6A. These test results may provide guidance to remote aerial applicators as to the best application height and ground speed to use for their RPAAS for efficacious application of pest control products.

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“…A influência da velocidade de operação, da pressão e do tipo de bicos sobre a distribuição dos depósitos da pulverização de um pulverizador FMC modelo 12-RC foram avaliados por (CARPENTER et al, 1983). As avaliações da deposição foram realizadas em postes com duas alturas onde foram colocados os coletores.…”

Section: Tecnologia De Aplicação Na Citriculturaunclassified

“…Nessas condições de trabalho os resultados de maior e menor variação na deposição foram obtidos com uma velocidade de 0,89 m.s -1 e volume de aplicação de 617 L.ha -1 , com arranjo de bicos de 66 % da calda no terço superior e 34 % da calda nos dois terços inferiores para plantas consideradas de tamanho médio (4,1 m), e com arranjo 50 e 50 % nas plantas consideradas pequenas (3,1 m). Salyani (1988) Palladini (1990) avaliou o efeito dos mesmos parâmetros estudados por Carpenter et al (1983) em macieiras sob diferentes alturas e posições, utilizando um pulverizador de jato transportado Arbus modelo 850. A melhor distribuição da pulverização foi obtida com um arranjo de bicos 50 e 50 %, aplicando um volume igual nas partes superior e inferior da planta, respectivamente.…”

Section: Tecnologia De Aplicação Na Citriculturaunclassified

Avaliação de dois sistemas para aplicação de agrotóxicos em citros

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Rural por terem me recebido no curso do Mestrado em Máquinas Agrícolas. À Coordenação de Aperfeiçoamento de Pessoal de Nível Superior-CAPES pela concessão da bolsa de estudos. Ao Professor Dr. Casimiro Dias Gadanha Jr. pela orientação e confiança depositada em mim para o desenvolvimento deste trabalho, pelos conselhos, pela amizade e convívio por todo este tempo. Ao Dr. Marcos Vilela e ao Centro Brasileiro de Bioaeronáutica pelo apoio e valiosa contribuição para o desenvolvimento deste trabalho, muito obrigado pela amizade e confiança.

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Spray Deposition from a Row-Crop Airblast Sprayer

Cited by 3 publications

References 0 publications

Payload Capacities of Remotely Piloted Aerial Application Systems Affect Spray Pattern and Effective Swath

Payload Capacities of Remotely Piloted Aerial Application Systems Affect Spray Pattern and Effective Swath

Effect of Application Height and Ground Speed on Spray Pattern and Droplet Spectra from Remotely Piloted Aerial Application Systems

Avaliação de dois sistemas para aplicação de agrotóxicos em citros

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