All stored manure shall be covered by a fully enclosed structure with a roof or lid over the entire structure. No more than three (3) cubic feet of manure shall be stored on the permitted tract of land. All other manure not used for composting or fertilizing shall be removed. The henhouse, chicken tractor, chicken pen and surrounding area must be kept free from trash and accumulated droppings. Uneaten feed shall he removed in a timely manner.