A system for detecting the presence of a plant on the ground includes a light module configured to emit a light beam having a shape with a length longer than a width. The system may include one or more lenses each having one or more photodetectors. The photodetectors may be arranged in a side-by-side configuration and are configured to receive reflected portions of the light beam. The lenses may be configured to direct the reflected portions of the light beam onto the photodetectors.
