All general and special agricultural, farming, ranching, stables, livestock, and poultry raising, dairy and other related uses so long as same do not cause a hazard to health by reason of unsanitary conditions; and not offensive by reason of odors, dust, fumes, noise, or vibrations; and are not otherwise detrimental to public welfare; and in no case shall poultry, fowl or swine be kept nearer than 20 feet from any property line.