A mounting structure for mounting a pivot arm to an implement has a cylindrical member, an adjusting sleeve, and a mounting bolt extending through the cylindrical member and adjusting sleeve to fix the cylindrical member and adjusting sleeve together. The cylindrical member extends through a bore of a bearing housing for rotation within the bearing housing. The adjusting sleeve has a threaded external surface. A disc spring is positioned on the adjusting sleeve. An adjusting nut is threaded onto the threaded external surface of the adjusting sleeve. The adjusting nut can be tightened to compress the disc spring to create a lateral bearing force against the bearing housing. The bearing housing can be integral with a pivot arm for mounting a gauge wheel assembly on a planter row unit, or the bearing housing can be a fixed part for mounting a pivot arm for a closing/press wheel on a drill.

A mounting structure for mounting a pivot arm to an implement has a cylindrical member, an adjusting sleeve, and a mounting bolt extending through the cylindrical member and adjusting sleeve to fix the cylindrical member and adjusting sleeve together. The cylindrical member extends through a bore of a bearing housing for rotation within the bearing housing. The adjusting sleeve has a threaded external surface. A disc spring is positioned on the adjusting sleeve. An adjusting nut is threaded onto the threaded external surface of the adjusting sleeve. The adjusting nut can be tightened to compress the disc spring to create a lateral bearing force against the bearing housing. The bearing housing can be integral with a pivot arm for mounting a gauge wheel assembly on a planter row unit, or the bearing housing can be a fixed part for mounting a pivot arm for a closing/press wheel on a drill.

A tillage implement includes a front gang and a rear gang. The front gang includes a first row of spoke wheels, each coupled to a front axle at an oblique angle. The rear gang includes a second row of spoke wheels, each coupled to a rear axle at the oblique angle. The tillage implement also includes a row of disc blades positioned behind the front gang and the rear gang with respect to a direction of travel of the tillage implement.

The system can include: an implement frame and a set of modular assemblies. The system can optionally include a vehicle and a set of effectors. However, the system can additionally or alternatively include any other suitable set of components. The system can function to facilitate automated and/or perception-based weeding and/or other automated agricultural operations. Additionally, the system can function to collect plant-level data on crops during implement operation. However, the system can additionally or alternatively be configured to provide any other suitable functionality.

An agricultural implement includes a frame coupled to a tow hitch, a toolbar coupled to frame, a plurality of row units carried by the toolbar, a first wheel assembly coupled to the frame, a second wheel assembly coupled to the frame. Each wheel assembly is configured to be moved laterally and longitudinally relative to the frame. The tow hitch is configured to be pulled by a tractor. Methods of configuring agricultural implements are also disclosed.