Some farmers have been searching for a tractor that doesn’t need oil, a power source that could reproduce itself, was easy to repair and burn home grown fuel.  Jim Gulbranson has a tractor that does all that and even fertilizes the soil.  It’s called the horse.  Gulbranson is part of a small, but growing number of farmers who quietly traded their tractors for plow horses.  Nostalgia has nothing to do with it.  Gulbranson can make more money farming with horses than he can with tractors.  It takes him longer to do his work, but doesn’t have to pay the interest on a half million dollars worth of farm machinery or the mortgage for more land to make that machinery worthwhile.  He has found that he can live as comfortably as his neighbor on a farm that is one sixth the size.