A wheel supported vehicle having a burning chamber, a draft stack in communication with a forward end of the burning chamber and a burner at a rear of the burning chamber. An air mover means operable to deliver air to the stack and to the burning chamber. As the vehicle is moved forwardly over a field, the heat from burning combustible material at the rearward end of the chamber will be drawn forwardly to evaporate moisture from the combustible material in the path of the chamber so that it will move readily ignite and burn clearly.
