Performance Evaluation of Variable Rate Spraying System under Simulated Conditions
DOI:
https://doi.org/10.52151/jae2024612.1839Abstract
Precise canopy measurement is the key to success for a variable rate spraying system. In this study, a variable rate spraying system was developed and its performance was evaluated under simulated laboratory conditions. The calibration and testing of individual components of the system were performed before integration into a system. Linear relationship was observed between distance and voltage (R2= 0.995) during calibration of the ultrasonic sensor. The detection range of ultrasonic sensor in real working conditions was found in the range of 0.20 to 7.5 m. It was maximum with flat surface board as compared to the artificial plant. Performance of the system was also tested under simulated dynamic conditions with plants. The mean absolute percentage error (MAPE) in canopy depth and specific spray volume was observed between 10.12% to 11.85% and 11.03% to 12.44%, respectively. The results also demonstrated that MAPE of canopy depth and specific spray volume was higher with plants grown in pots than that of with reference flat surface board, and this could be attributed to variation in canopy size, shape etc. However, the developed variable rate spraying system performed satisfactorily in executing the variable rate spray delivery under simulated conditions.
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References
Anonymous. 2022. Ministry of Agriculture and Farmers Welfare, Govt of India. Area, Production and Productivity of Various Horticulture Crops in India (2021-2022-3rd Advance Estimates).
Balsari P; Doruchowski G; Marucco P; Tamagnone M; Van de Zande J; Wenneker M. 2008. A system for adjusting the spray application to the target characteristics. Agricultural Engineering International: CIGR Journal. 8(2), 11.
Bora G C; Mistry P; Lin D. 2015. Evaluation of sensors for sensing characteristics and field of view for variable rate technology in grape vineyards in North Dakota. Journal of Applied Horticulture, 17(2), 96-100.
Butts T R; Butts L E; Luck J D; Fritz B K; Hoffmann W C; Kruger G R. 2019. Droplet size and nozzle tip pressure from a pulse-width modulation sprayer. Biosystems engineering, 178, 52-69.
Escolà A A; Planas de Martí S; Rosell P J R; Pomar G J; Camp F; Solanelles B F; Gràcia F; Llorens Calveras J; Gil E. 2011. Performance of an ultrasonic ranging sensor in apple tree canopies. Sensors, 2011, vol. 11, (3), 2459-2477.
Gil E; Escolà A; Rosell J R; Planas S; Val L. 2007. Variable rate application of plant protection products in vineyard using ultrasonic sensors. Crop Protection, 26(8), 1287-1297.
Giles D K; Delwiche M J; Dodd R B. 1988. Electronic measurement of tree canopy volume. Transactions of the ASAE, 31(1), 264-0273.
Jeon H Y; Zhu H; Derksen R; Ozkan E; Krause C. 2011. Evaluation of ultrasonic sensor for variable-rate spray applications. Computers and Electronics in Agriculture, 75(1), 213-221.
Jichen C; Xiu W; Jian S; Songlin W; Shuo Y; Chunjiang Z. 2017. Development of real-time laser-scanning system to detect tree canopy characteristics for variable-rate pesticide application. International Journal of Agricultural and Biological Engineering, 10(6), 155-163.
Llorens J; Gil E; Llop J; Escolà A. 2011. Ultrasonic and LIDAR sensors for electronic canopy characterization in vineyards: Advances to improve pesticide application methods. Sensors, 11(2), 2177-2194.
Palleja T; Landers A J. 2015. Real time canopy density estimation using ultrasonic envelope signals in the orchard and vineyard. Computers and Electronics in Agriculture, 115, 108-117.
Rosell J R; Sanz R. 2012. A review of methods and applications of the geometric characterization of tree crops in agricultural activities. Computers and electronics in agriculture, 81, 124-141.
Singh S P; Gupta K; Kumar S. 2014. Judicious use of pesticides in sustainable crop production and PGR management. ICAR E publication (NBP-14-06), 1-21.
Solanelles F; Escolà A; Planas S; Rosell J R; Camp F; Gràcia F. 2006. An electronic control system for pesticide application proportional to the canopy width of tree crops. Biosystems engineering, 95(4), 473-481.
Zaman Q U; Salyani M. 2004. Effects of foliage density and ground speed on ultrasonic measurement of citrus tree volume. Applied Engineering in Agriculture, 20(2), 173-178.
Zhou H; Jia W; Li Y; Ou M. 2021. Method for estimating canopy thickness using ultrasonic sensor technology. Agriculture, 11(10), 1011.
