Nozzle Spray Distribution for Pesticide Application

Azimi, Asghar; Carpenter, T. G.; Reichard, D. L.

doi:10.13031/2013.32451

Cited by 36 publications

(18 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The baseline CV with XR8005 nozzles averaged 5.1%. The threshold for a desirable pattern CV was considered at or below 10% (Azimi et al, 1985;. As the lateral angle rotation of the center nozzle increased, the CVs also tended to increase (table 1).…”

Section: Comparison Of Laboratory Simulated Pattern Data Versus Full mentioning

confidence: 99%

“…Pressure testing of a single nozzle showed decreased spray pattern CV with increased pressure, with the exception of cone and flooding nozzles which showed less improvement with increased pressure (Azimi et al, 1985). Tilt angle (which involved rotating one nozzle) away from the direction of travel was shown to decrease CV, but the investigators warned this may leave spray droplets more susceptible to drift (Azimi et al, 1985). While most studies have focused on how operation (i.e., boom height, tilt, roll, and pressure) of a single nozzle may affect spray uniformity, little has been done to quantify how setup factors of an individual nozzle among a boom of properly mounted nozzles might contribute to the spray distribution of the system.…”

mentioning

confidence: 91%

“…The findings concluded that boom roll angles as small as one degree could affect the spray pattern CV. A simulation (Mawer and Miller, 1989) and results from a single nozzle (Azimi et al, 1985) showed that spray pattern CV decreased with increased height. Pressure testing of a single nozzle showed decreased spray pattern CV with increased pressure, with the exception of cone and flooding nozzles which showed less improvement with increased pressure (Azimi et al, 1985).…”

mentioning

confidence: 99%

“…A simulation (Mawer and Miller, 1989) and results from a single nozzle (Azimi et al, 1985) showed that spray pattern CV decreased with increased height. Pressure testing of a single nozzle showed decreased spray pattern CV with increased pressure, with the exception of cone and flooding nozzles which showed less improvement with increased pressure (Azimi et al, 1985). Tilt angle (which involved rotating one nozzle) away from the direction of travel was shown to decrease CV, but the investigators warned this may leave spray droplets more susceptible to drift (Azimi et al, 1985).…”

mentioning

confidence: 99%

“…Individual nozzle spray pattern quality has been shown to decrease with orifice wear . Field operation factors such as boom height, boom roll angle, and boom pitch angle have been investigated (Azimi et al, 1985); however, individual nozzle setup errors and nozzle mounting geometry have not been studied. Therefore, further research regarding the effects of individual nozzle setup errors on sprayer uniformity would be useful.…”

mentioning

confidence: 99%

See 4 more Smart Citations

Laboratory and Full Boom-Based Investigation of Nozzle Setup Error Effects on Flow, Pressure, and Spray Pattern Distribution

Forney¹,

Luck²,

Kocher³

et al. 2017

Applied Engineering in Agriculture

View full text Add to dashboard Cite

Abstract.Pesticide application is an integral part of crop production, and ground-based agricultural boom sprayers are used extensively to apply pesticides to the crop canopy or soil surface across millions of acres in the United States. Efficient application is necessary to minimize costs and limit adverse environmental impacts. The goals of this study were to provide quantified measurements on the effects of nozzle setup errors on spray pattern uniformity and evaluate how laboratory patternator-based simulations would compare to measurements on a full spray boom. More specific objectives were to determine the effects of factors such as nozzle lateral angle, nozzle spacing, nozzle replacement, and nozzle pitch angle on spray pattern distribution and evaluate a simulation approach to predict the effects of single nozzle boom setup errors on full boom system pattern uniformity. Laboratory and sprayer-based tests were devised to quantify the impact of nozzle setup and operational errors on spray pattern uniformity, boom pressure, and nozzle flow rates. Results indicated that small variations in boom setup or nozzle operation (i.e., pressure or flow) can cause significant errors in spray nozzle distribution which may not be completely detectable by measuring spray pattern alone. Simulations using laboratory data from setup or operational errors reflected similar changes (differences less than 2.6%) in spray pattern CV as full boom data with similar setup errors. These findings were significant in that it may be possible to model errors within full boom spray distributions based on smaller laboratory-collected datasets. Keywords: Equipment, Equipment for crop protection, Patternator, Spray pattern distribution, Spraying.

show abstract

Section: Comparison Of Laboratory Simulated Pattern Data Versus Full mentioning

confidence: 99%

mentioning

confidence: 91%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

Laboratory and Full Boom-Based Investigation of Nozzle Setup Error Effects on Flow, Pressure, and Spray Pattern Distribution

Forney¹,

Luck²,

Kocher³

et al. 2017

Applied Engineering in Agriculture

View full text Add to dashboard Cite

show abstract

A method to spatially assess multipass spray deposition patterns via UV fluorescence and weed population shifts

Koo,

Godara,

Cubas

et al. 2024

Crop Science

View full text Add to dashboard Cite

Spray deposition patterns from agricultural sprayers are traditionally sampled discretely along a field transect accounting for 0.5% or less of the treated area. Such methods may not fully capture the dimensional variability inherent in large‐scale, multiple‐pass spray applications, especially evident from an agricultural spray drone (ASD). This study investigated the utilization of UV‐fluorescent dye and nighttime aerial imaging techniques to assess large‐scale, multipass spray deposition patterns. Accuracy of digital hue from UV‐fluorescent photography to predict deposition of proxy dye was confirmed via fluorometry assessed intensity levels of extracted UV‐fluorescent dye from 384 Petri dishes placed prior to treatment. Results showed that ASD applications, regardless of nozzle type, exhibited greater spatial variability within the target area compared to ride‐on sprayer applications, primarily due to overapplication. Additionally, the ASD generated spray drift to adjacent nontarget areas that was at least three times more than that of ride‐on and spray‐gun sprayers. Multipass deposition was further assessed via in situ smooth crabgrass infestation following treatment with quinclorac or topramezone by multipass ASD or hand‐held, four‐nozzle spray boom. Weed infestation annotated from overlaid grids with 9.3‐dm2 ground resolution inconsistently detected spatial heterogeneity between transects assessed along the center and edge of each sprayer pass. The ASD controlled smooth crabgrass 11% more than the hand‐held sprayer, albeit with an 18% increase in spray drift to nontarget areas, similar to the UV‐fluorescence study. Digitally assessed average hue of fluorescence photography appears to be a viable method to assess multidimensional and continuous spatial relationships of spray deposition.

show abstract

Effects of wind direction, wind speed and travel speed on spray deposition

Nordbo¹,

Kristensen²,

Kirknel³

1993

Pestic. Sci.

View full text Add to dashboard Cite

Deposition variability from a conventional field sprayer, and effects of wind and travel speed were measured by collecting on small artificial targets in the swath. Whilst deposition on 0.1-m2 plots varied by a factor of 3, deposition on single vertical targets typically varied by a factor of 10 and on horizontal targets by a factor of 6. Distinct transversal deposition patterns appeared according to wind direction. The quantity and structure of variability was compared with wind speed and turbulence intensity, but few significant trends were found. Deposition on vertical targets was enhanced by increasing wind speed or increasing travel speed, whilst effects on horizontal targets were inconsistent.

show abstract

Nozzle Spray Distribution for Pesticide Application

Cited by 36 publications

References 0 publications

Laboratory and Full Boom-Based Investigation of Nozzle Setup Error Effects on Flow, Pressure, and Spray Pattern Distribution

Laboratory and Full Boom-Based Investigation of Nozzle Setup Error Effects on Flow, Pressure, and Spray Pattern Distribution

A method to spatially assess multipass spray deposition patterns via UV fluorescence and weed population shifts

Effects of wind direction, wind speed and travel speed on spray deposition

Contact Info

Product

Resources

About