What is referred to by 'containing iron'?

Based on the clue 'containing 672 cubic inches its 132 of a bushel', what is the answer? Based on the clue 'containing a mixture of about 40 herbs this aromat...', what is the answer? Based on the clue 'containing a source of the nile near jinja this co...', what is the answer? What is associated with: containing doylestown quakertown its home to 600000 pennsylvanians? Based on the clue 'containing less than 1 of the mass in the solar sy...', what is the answer? Based on the clue 'containing the hit can you feel the love tonight i...', what is the answer? Based on the clue 'containing the name of a defunct kingdom this iron...', what is the answer? Based on the clue 'contains the lowest point in the nation', what is the answer?