Modification of Boom for a Lever Operated Knapsack Sprayer

Rabbani, Ma; Basir, M. S.; Rifat, Sazzad Mahmud; Mona, N.

doi:10.18801/jstei.080220.61

Cited by 3 publications

(5 citation statements)

References 2 publications

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“…The theoretical field capacity (TFC, fed/h) was calculated using the following equation according to Rabbani et al (2020):…”

Section: Theoretical Field Capacitymentioning

confidence: 99%

“…Pesticides are being used till now for protecting crops and increasing the yield of crops. These pesticides are mostly being applied using sprayers, Bhanagare (2015) and Rabbani et al (2020). Knapsack sprayers are indispensable agricultural equipment for small farmers to pest control because of affordability and ease of operation, knapsack sprayers commercially available are manual, petrol engine operated and battery operated, Sinha et al (2018).…”

Section: Introductionmentioning

confidence: 99%

“…It was estimated that around 50 to 80 % of applied pesticides are wasted due to poor spray machinery and inappropriate application methods, Khan et al (1997). Rabbani et al (2020) designed and developed a boom for lever operated sprayer; the boom contained four plastic nozzles at a distance interval of 20.75 cm, then tested performance of this boom, they found that; the effective field capacity of the boom sprayer was 0.35 fed/h at walking speed of 2.015 km/h whereas the field efficiency was 71.86 %. Rahman (2010) reported that the effective field capacity of the boom sprayer and spraying by lance swing were 0.48 and 0.46 fed/h, respectively by considering the field efficiency of 75% and the coefficient of uniformity of spray distributions was improved by 28% due to using the boom and concluded that the boom might be used with a lever operated knapsack sprayer to increase the uniformity of deposition.…”

Section: Introductionmentioning

confidence: 99%

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Improvement of spray distribution pattern for a knapsack sprayer using boom spray nozzles

Megahed

Fouad

Rasmy

et al. 2021

Al-Azhar Journal of Agricultural Engineering

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Knapsack sprayers of various types are commonly used in Egypt, especially in small farms, but; performance of most of these sprayers and their ability to be used pesticides accurately and efficiently is poor. Therefore, this research was carried out to overcome some problems of knapsack sprayers, uneven spraying and low field capacity. The research aims to develop and evaluate performance of a boom for a knapsack sprayer to improve spray quality and distribution pattern and increasing the field capacity. The developed boom was tested at different spray pressures, nozzles spacing and height of spray boom. The results showed that; The average values of spray liquid discharge rates for the developed sprayer were 1.29, 1.56 and 1.86 L/min at spray pressures 1.5, 2.0 and 2.5 bar, respectively. For the uniformity of spray volume distribution, the ratio of nozzle spacing to spray height 1:1 was the best for all tested cases of spray pressure due to the values of variation coefficient was less than 10 %, and it's preferable to be nozzles spacing and spray height at 50 cm to increase the performance rate of spraying under all tested pressures. The developed sprayer can be used for spray volume rates from 60 -80 L/fed. The maximum values of the theoretical field capacity were 1.86 and 1.40 fed/h for spray volume rates of 60 and 80 L/fed, respectively at spray pressure of 2.5 bar, whereas; The maximum values of the effective field capacity were 1.44 and 1.12 fed/h for spray volume rates 60 and 80 L/fed, respectively at spray pressure of 2.5 bar and spraying width of 3.0 m. Also, the average values of field efficiency were 82.20, 80.53 and 78.81 % at spray pressures 1.5, 2.0 and 2.5 bar, respectively. the average values of continuous operating time of the developed sprayer using the battery were 8.27, 5.55 and 3.85 h at operating pressures 1.5, 2.0 and 2.5 bar, respectively.

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“…The theoretical field capacity (TFC, fed/h) was calculated using the following equation according to Rabbani et al (2020):…”

Section: Theoretical Field Capacitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Improvement of spray distribution pattern for a knapsack sprayer using boom spray nozzles

Megahed

Fouad

Rasmy

et al. 2021

Al-Azhar Journal of Agricultural Engineering

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“…[5] Freitas (2006) submitted that repetitive effort can result to muscular fatigue, a fact that has not been researched for knapsack sprayers. As presented by [2] workers, when using heavy equipment are subject to fatigue and development of musculoskeletal problems. In line with this, it was recommended that the adoption of posture training, workout gymnastics and the adoption of scheduled breaks to mitigate the risks involved due to the sprayer weight.…”

Section: Introductionmentioning

confidence: 99%

Operations of Knapsack Sprayer and Its Impacts on Physiological Parameters of Selected Operators

Afolabi¹,

Adejumo²,

Atere³

et al. 2023

ENG

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The study was aimed at determining the impacts of operating Manually Operated Hand Lever Knapsack Sprayers (MOHLKS) on physiological responses of the operators as dependent on anthropometric variations and sex. Twenty eight subjects, (4 female, 24 male) Mean ± SD: Age 22.5 ± 1.92, 24.29 ± 2.2 years; Body Mass Index 24.6 ± 4.8, 21.7 ± 2.4 kg/m 2 were employed in the study. Selected anthropometric parameters of weight and height were used to determine body mass index (BMI), with these are arm-reach forward, elbow to fingertip, hand length and hand width were measured to establish human variations in diversity. Subjects undertook the operation at 5 replicates each, before and after which information about operators' body pain locations and body physiological changes of heart rates were obtained. Measured parameters were used in the determination of expended energy (EE), physiological cost (PC), oxygen intake (VO 2 ) and aerobic power (VO 2 max). Alongside with these were operational parameters of stroke, pace and time taken to get the operation done and environmental factors of temperature and relative humidity. The results revealed on the average that the BMI (24.61 ± 4.78 kg/m 2 ) in female operators was higher, this corresponded to PC and VO 2 , while the VO 2 max (34.83 ± 3.30 ml/min/kg) in males is higher. More EE was obtained in female subjects (3.53 ± 3.76 kCal/min) as compared to male subjects (3.42 ± 7.48 kCal/min). The main effects plot of operational factors on EE displayed the stroke made by the subjects during spraying operation as parameter with largest effect on EE. Regression equation for EE and PCI is given as PCI = 1.97 + 25.2 EE, while the P-value at α = 0.05 is 0.000 and R 2 = 98.8%. Post operational body pain showed that 19 out of 28 subjects incurred at least one type of body pain, with shoulder pain as most frequent. The results of the study suggest that early incidence of fatigue may occur in female operators as How to cite this paper:

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“…The atomization process will be affected by the physical properties of the liquid that is sprayed along with the design and configuration of the nozzle" [8]. Gravitational sedimentation, inertial impact, or both of the two processes can cause spray deposition on the soil's surface, plant canopy, or flying insects [9]. Weather parameters, mainly wind, low humidity, and high temperatures, have an important effect on the spray droplets' transportation to the target.…”

Section: Introductionmentioning

confidence: 99%

Assessment of Nozzle Spray Characteristics for Agriculture Spraying

Santosh,

Shirwal,

Sushilendra

et al. 2023

IJECC

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The studies on the operational parameters of selected nozzles were conducted in the laboratory using a patternator with the operational parameters of four types of nozzles (hollow cone, 3-way discharge nozzle (3D), flood type, and solid cone nozzle), five operating pressures (400, 500, 600, 800, and 1000 kPa), and five nozzle heights (0.2, 0.3, 0.4, 0.5, and 0.6 m). The effects of independent variables on spray discharge, droplet size, uniformity coefficient, droplet density, and spray angle were studied. It was observed that the discharge rate increased by increasing the operating pressure, and discharge varied for different types of nozzles. The Hallow cone nozzle exhibited a minimum discharge rate of 0.515 l/min, and the maximum discharge rate recorded was 1.546 l/min for the 3D nozzle. The droplet size decreases with increasing operating pressure. As the operating pressure increased, the size of the droplets formed into fine particles. The maximum droplet size of 251 µm was produced by the 3D nozzle, and the minimum was 117 µm by the Hallow cone nozzle. The spray uniformity increased with an increase in operating pressure. Spray uniformity was minimal in cases of low operating pressure because of the size of the droplets. Droplet density increased with an increase in operating pressure. Spray angle increases with increasing operating pressure. The spray angle is decreased by increasing the nozzle height because of gravity. Spray angles are different for different nozzles.

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Modification of Boom for a Lever Operated Knapsack Sprayer

Cited by 3 publications

References 2 publications

Improvement of spray distribution pattern for a knapsack sprayer using boom spray nozzles

Improvement of spray distribution pattern for a knapsack sprayer using boom spray nozzles

Operations of Knapsack Sprayer and Its Impacts on Physiological Parameters of Selected Operators

Assessment of Nozzle Spray Characteristics for Agriculture Spraying

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