Basically I want to say:
Sheep grazing is one of the possible ways to restore the biodiversity of alpine meadows that have been uncultivated for a long time.
But I would like to form much nicer and simpler sentence. I would imagine something like this:
Sheep grazing is one of the possible ways to restore the biodiversity of [THAT WORD] uncultivated alpine meadows.
So I am looking for a single word that would beam "for a long time" which could be placed there to make the sentence more fluent :-)
The only thing I can think of is "longly" but this sounds suspicious to me :-)