
NDSU Row-Crop Robot Achieves 96.5% weeding accuracy in sugarbeet trials
Engineers at North Dakota State University have developed and field-tested an autonomous mechanical weeding robot that achieved 96.5% weeding efficacy in sugar beet trials.
The system combines an Amiga robotic platform with a three-row cultivator featuring independently controlled sweep blades for precise, site-specific weed removal.
Using RTK-GPS, strain gauge load cells and laser distance sensors, the robot can adjust blade positioning and depth based on field conditions.
Trials showed that the system could achieve 50% weed coverage while reducing overall soil disturbance by 48.7% compared with less targeted cultivation.
The robot maintained an average tillage depth close to the 30-millimetre target, demonstrating precise mechanical control.
However, its current operating speed of about 0.5 metres per second remains a major limitation for large-scale commercial deployment.
Researchers see faster actuators, improved positioning updates and multiple robots working in parallel as key steps toward commercial-scale autonomous mechanical weeding.