Abstract: An agricultural implement is provided that includes a first tool bar supporting first ground engaging tools. The agricultural implement further includes a second tool bar supporting second ground engaging tools and coupled to the first tool bar by a pivot joint. Additionally, the agricultural implement includes a working plate secured to the first tool bar and having a joint structure partially defining the pivot joint. Furthermore, the agricultural implement includes a stress feathering plate secured between the working plate and the first tool bar and secured to both the working plate and the first tool bar, the stress feathering plate extending beyond the working plate and having a contour that provides a reduced stress gradient when the first tool bar, the working plate and the stress feathering plate are loaded by engagement of the first and second ground engaging tools with the ground.

Abstract: An agricultural implement is provided that includes a first tool bar supporting first ground engaging tools. The agricultural implement further includes a second tool bar supporting second ground engaging tools and coupled to the first tool bar by a pivot joint. Additionally, the agricultural implement includes a working plate secured to the first tool bar and having a joint structure partially defining the pivot joint. Furthermore, the agricultural implement includes a stress feathering plate secured between the working plate and the first tool bar and secured to both the working plate and the first tool bar, the stress feathering plate extending beyond the working plate and having a contour that provides a reduced stress gradient when the first tool bar, the working plate and the stress feathering plate are loaded by engagement of the first and second ground engaging tools with the ground.

Abstract: A grain drill is disclosed having a folding frame for parallel operation and a parallel link system that controls the tension to earth openers in order to produce relatively constant downward pressure for the openers. The grain drill includes a rotating tool bar for facilitating the adjustment of downward pressure to the openers, controlling the ground cutting depth of the openers and raising the tools to obtain the ground clearance needed for road transport. The drill has disc openers with axially collocated discs having different outer diameters and a narrow angle between the opener discs producing a "V" shaped groove for seeding. The grain drill has a common horizontal center to support seed boxes, fixed dual wheels and a hitch for connection to a pulling vehicle.

Abstract: A field drag particularly adapted for use in conjunction with a post-plowing cultivating implement includes a mounting bar section pivotally secured to the frame of the implement and extending in a rearward direction behind the implement. A plurality of spaced, soil-working teeth are secured to the bar section and extend downwardly therefrom and generally toward one end of the bar section so as to form an acute included angle with respect to the bar section. An adjustable spring tension arrangement pulls the bar section resiliently toward the implement thereby urging the teeth into the soil as the drag is pulled across a seedbed to break up and pulverize clods and smaller chunks of earth into loose soil. In a modified form, the teeth may be fastened to the bar section to slant selectively toward one end or the other of the bar section.