301.029.  Implements of husbandry, movement on highway permitted, when — definition. — 1.  Any self-propelled sprayer, floater, or other form of implement of husbandry that is used for spraying chemicals or spreading fertilizer for agricultural purposes may be moved or operated on the highways of this state without complying with the provisions of this chapter relating to titling, registration, and the display of license plates.

  2.  The exemption for titling, registration, and the display of license plates provided for in subsection 1 of this section shall apply whether the described vehicles are laden or unladen.

  3.  All other requirements of the law relating to motor vehicles, unless the context clearly provides otherwise, shall apply to the vehicles described in subsection 1 of this section when operated on the highways of this state.

  4.  As used in this section, the term "implement of husbandry" means all self-propelled machinery manufactured for operation at low speeds, specifically designed for, or especially adapted to be capable of, incidental over-the-road and primary off-road usage and used exclusively for the application of commercial plant food materials or agricultural chemicals.