Abstract
Aim of study: To develop and assess a cotton fertilizer applicator integrated with a Machine Vision Based Embedded System (MVES) to achieve precise and site-specific fertilization.
Area of study: The investigation was performed in the Indian Institute of Technology, Kharagpur.
Material and methods: The MVES included a cotton detection system with a web camera, processor (computer), and python-based algorithm, and a fertilizer metering control unit with a stepper motor, motor driver, power supply, and microcontroller. The python-based algorithm in the computer predicts the presence (or absence) of cotton plants, whenever an input image is received from the camera. Upon cotton detection, it transforms into a Boolean signal sent to the microcontroller via PySerial communication, which instructs the motor to rotate the metering unit. Motor adjusts the speed of metering unit based on machine speed measured through a hall sensor, ensuring site-specific delivery of metered fertilizer A developed lab setup tested the MVES, experimentally examining performance indicators.
Main results: The MVES obtained a MAPE of 5.71% & 8.5%, MAD 0.74 g/plant & 1.12 g/plant for urea and DAP (di-ammonium phosphate), respectively. ANOVA revealed no statistically significant effect of forward speed on the discharge fertilizer amount (p>0.05). For urea, discharge rates ranged from 1.03 g/s (at 10 rpm, 25% exposure length of metering unit) to 40.65 g/s (at 100 rpm, 100% exposure). DAP ranged from 1.43 to 47.66 g/s under similar conditions.
Research highlights: The delivered application dosage conformed the recommended dosage. The developed MVES was reliable, had a quick response, and worked properly.
Publisher
Instituto Nacional de Investigacion y Tecnologia Agraria y Alimentaria (INIA)
Subject
Agronomy and Crop Science
Reference48 articles.
1. Abdel-Aziz HMM, Hasaneen MNA, Omer AM, 2016. Nano chitosan-NPK fertilizer enhances the growth and productivity of wheat plants grown in sandy soil. Span J Agric Res 14(1): e0902.
2. Alameen AA, Al-Gaadi KA, Tola E, 2019. Development and performance evaluation of a control system for variable rate granular fertilizer application. Comput Electron Agr 160: 31-39.
3. Bakhtiari MR, 2014. Selection of fertilization method and fertilizer application rate on corn yield. Agr Eng Int: CIGR J 16(2): 10-14. https://cigrjournal.org/index.php/Ejounral/article/view/2700.
4. Berenstein R, Edan Y, 2017. Human‐robot collaborative site‐specific sprayer. J Field Robotics 34(8): 1519-1530.
5. Blumenthal JM, Baltensperger DD, Cassman KG, Mason SC, Pavlista AD, 2008. Importance and effect of nitrogen on crop quality and health. In: Nitrogen in the environment, pp. 51-70. Academic Press.