Abstract: The invention pertains to apparatus for use with a row planter unit. The apparatus includes an elongated and laterally extending bar operatively secured to a row planter unit for pulling same in a forward direction of travel. The apparatus includes a frame carried by the elongated and laterally extending bar and a support arm pivotally mounted thereon. At least one rotatable trash wheel is carried on the support arm. The row planter unit is pivotally supported on the frame rearwardly of the trash wheel in the direction of travel. Articulated members operatively connect the support arm to the row planter unit for applying a pull force to the rear of the support arm for controlling the depth of penetration of the trash wheel into the ground. The articulated members may comprise various alternatives including a link chain, a pair of links pivoted to one another in an offset relationship, or a link and a turnbuckle arrangement.

Abstract: A tillage implement includes straight bar ripper structure with a main forward toolbar supporting subsoiler shanks from special brackets which can also support coulters ahead of the shanks independently of additional toolbar structure. An optional rear or secondary toolbar is attached by four-bar linkages to the main toolbar. The four-bar linkages allow the operator to adjust the height of the secondary toolbar relative to the main toolbar to accommodate changes in the operating depth of the rippers. The linkages may also be released to allow the secondary toolbar to float relative to the main toolbar. The secondary toolbar accommodates different attachments behind the rippers, such as disk bedders, lister bedders and strip till rigs which can operate at optimum attack angles and penetration regardless of the operating depth of the ripper.