A rack for carrying sports equipment alongside a personal watercraft. The envelope comprises a front see-through window and a rear see-through window that are registered, such that an observer of the envelope can view through the envelope to examine its contents. The dryer vessel receives the manure for contact with the turbine exhaust gases to convert the manure to a dry material, which is passed to the processing unit where it is formed into granules, pellets or other desired form for the final dry fertilizer product.