Silo
While silage can be stored in many ways, the typical silo is a tall cylinder.  It usually has a cone or dome cap on top.  There is an opening at the top to put silage in, and doors running down one side to take it out.  Originally a farmer would climb the outside of the silo to the top of the silage, go inside, and shovel out the silage.  There is typically a chute on the outside, and the silage would fall down the chute, where it could be gathered and fed to the cows.  Now there is machinery that does that job.