US Patent 9485900 Agricultural implement plug detection

A plug detection system for an agricultural implement with a ground-engaging tool may include a rotational speed sensor, a ground speed sensing system, and a controller. The rotational speed sensor may be configured to detect a rotational speed of the ground-engaging tool. The ground speed sensing system may be configured to detect a ground speed of the agricultural implement. The controller may be in communication with the rotational speed sensor and the ground speed sensing system and may be configured to determine a threshold rotational speed based on the ground speed and send an alert signal when the rotational speed is below the threshold rotational speed.