Drivers hauling certain agricultural commodities are not subject to hours of service regulations (i.e., log books).

All drivers and motor carriers subject to the federal commercial vehicle regulations are subject to hours of service.  However, several exemptions exist, one of which is found in 49 CFR §395.1(k), related to agricultural commodities.  

(k) Agricultural operations. The provisions of this part shall not apply during planting and harvesting periods, as determined by each State, to drivers transporting:

  1. Agricultural commodities from the source of the agricultural commodities to a location within a 150 air-mile radius from the source;
  2. Farm supplies for agricultural purposes from a wholesale or retail distribution point of the farm supplies to a farm or other location where the farm supplies are intended to be used within a 150 air-mile radius from the distribution point; or
  3. Farm supplies for agricultural purposes from a wholesale distribution point of the farm supplies to a retail distribution point of the farm supplies within a 150 air-mile radius from the wholesale distribution point.