The invention relates to mechanisms used for propelling various working tools of agricultural machines. The mechanism includes a beam having at least three support surfaces and a platform with a working tool capable of moving along the beam on rollers rotatably mounted on the platform. Moreover, a tooth rack is rigidly attached to the beam with its teeth capable of interacting with a cogwheel mounted on the platform and shaped as a disk with bearings acting as the teeth of the gear. Besides, at least two support surfaces of the beam are oriented at an angle to the horizontal and perpendicular to the direction of rollers travel, with at least three rollers interacting with the support surfaces of the beam. This design enhances the operational reliability of the mechanism under various loads experienced by the working tool during its operation.

A method of controlling a mobile agricultural machine includes operating a row unit to deliver a product to a furrow. The row unit has a ground-engaging element configured to engage a ground over which the mobile agricultural machine travels. The method includes receiving an indication of rotational speed of the ground-engaging element and controlling an aspect of rotation of the ground-engaging element based on a determination that the rotational speed of the ground-engaging element is below a threshold.

A closing assembly for an agricultural row unit to be mounted on a trenching implement and configured for trench closing functions of various seeding, fertilizer, soil amendments, and soil working purposes. An example of the closing assembly includes a mounting frame for attaching to the agricultural row unit of the trenching implement. At least one mounting arm having a first end is connected to pivot about a mounting axis on the mounting frame, and a second end movable to different heights in response to pivotable movement of the first end. A handle is operatively associated with the mounting arm and moveable between at least two separate positions corresponding to the different heights of the second end of the mounting arm. At least one closing wheel is rotatably mounted on the second end of the mounting arm to move between each of the different heights.

A closing assembly for an agricultural row unit to be mounted on a trenching implement and configured for trench closing functions of various seeding, fertilizer, soil amendments, and soil working purposes. An example of the closing assembly includes a mounting frame for attaching to the agricultural row unit of the trenching implement. At least one mounting arm having a first end is connected to pivot about a mounting axis on the mounting frame, and a second end movable to different heights in response to pivotable movement of the first end. A handle is operatively associated with the mounting arm and moveable between at least two separate positions corresponding to the different heights of the second end of the mounting arm. At least one closing wheel is rotatably mounted on the second end of the mounting arm to move between each of the different heights.