Beets or pickled beets?
Beets are earthy and super-sweet (a lot of sugar is made from beets instead of sugar cane). They benefit from a good dose of salt and acid to play up and balance their sweetness and cut through the earthiness. Mostly the salt makes the difference, though.
Carrots are an earthy vegetable, for point of reference. Not as much as beets, but you can definitely taste an earthiness in them.