møddingplads, noun dung yard
First of all, let me say that it's funny what all comes up in the course of normal translation work. This one struck me because "dung yard" sounds quite old fashioned to me. So I did a little search on Google, one of my standard procedures in hunting for the right word.
Google hits for +"cattle" +(the following term)
dung yard = 490
manure store = 657
manure storage facility = 637
manure storage area = 2510
I guess I'm going to go with "manure storage area." While I usually complain about the dictionary, in this instance, I would like to praise it for including the term. It's a lot easier for a native speaker of English (raised in cities) to figure out a more modern sounding way to say "dung yard" than it is to just pull a great translation for "møddingplads" out of thin air.