This plot sprayer was designed to possess the advantages of versatility and of being self-propelled and so not competing for a tractor during the busy planting season.

The sprayer illustrated in Figure 1 is mounted on four adjustable-width, rubber-tired wheels and is self-propelled by a 2 1/2 horse-power air-cooled engine which also operates an air compressor for agitating and distributing spray materials through nozzles on the booms. The assembly of five booms can be operated singly or together and can be adjusted for broadcast or band treatment of any row width or any combination of rows up to 200 inches wide.

The sprayer was built primarily for applying pre-emergence herbicides, but the boom assemblies can be adjusted anywhere from six to twenty-four or more inches above the ground, hence postemergence spray treatments are possible. The booms are attached to a conduit support and consist of nozzles connected at 20-inch intervals by 3-inch rubber hose. Two booms extend full length along the front and back of the support with nozzles offset to provide one every ten inches. The other three booms are short. All nozzle spacings may be adjusted to varying row widths.