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Performance evaluation of intra row weeder in soil bin

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Weed management is a tedious task, especially in organic crop production, as synthetic herbicides are prohibited and manual weeding is relatively expensive or unavailable. However, mechanical weed control is one of the options that can be implemented by growers to control weeds but the main challenge to both practical farmers and researchers is the selective control of the intra-row weeds. Based on this challenge the objective of the study was to evaluate the minimum plant to plant distance required to operate the developed automated intra row weeder with minimum plant damage.Main components of the automated weeder was ultrasonic sensor, D.C. motor, microcontroller, battery, frame, tine, inter and intra row blade. Ultrasonic sensor was used for the differentiate crop plant from weed. Intra row weeder was detecting the crop plant by sensor and removes the weed. The performance of automated intra row weeder unit was evaluated in the soil bin by determining percentage of plant damage. This parameter is mainly affected by the plant to plant distance and various forward speed of weeder. Various plant to plant distance was selected 15, 25, 35, 45 and 55 cm. where, three different forward speed 0.5, 1.0 and 1.5 km/h was selected. Results of automated intra row weeder showed that without damaging the crop plant minimum plant to plant distance is 35 cm required. For minimum plant damage, forward speed of intra row weeder is found 1.0 km/h.