Abstract: Improvements are disclosed for independent adjustment of the gauge wheel, disc hillers, stabilizer disc and, if desired, the rear, central sweep for an agricultural cultivator unit. The adjusting mechanism includes a screw jack which is easily accessible from the top of the cultivator for setting the adjustment of vertically telescoping inner and outer tubular sections, and a clamp for maintaining the setting once the adjustment is made. Improvements in the disc hiller structure itself include an indicator plate located at the top of the shank on which the disc is mounted for indicating the angular adjustment of the working angle of the disc, and a forged shank having a circular cross-section at the top, and a flattened portion at the bottom to provide strength but flexibility.

Abstract: An improved ventilation air control unit for use in grain drying and storage apparatus. The unit includes a pneumatic pathway unit that will accommodate a large fan blade, a motor and fan blade unit for causing air to move through the pneumatic unit, and a supplemental feed unit to provide supplemental air for delivery into the grain bin and for reducing air slippage around the fan blade.