As used in this article, unless the context requires a different meaning: “Orchard” means agricultural land located in the Commonwealth consisting of at least one-half acre of contiguous land dedicated to the growing of crops from trees, bushes, or vines, which crops are used or are intended to be used for commercial purposes. “Vineyard” means agricultural land located in the Commonwealth consisting of at least one-half acre of contiguous land dedicated to the growing of grapes that are used or are intended to be used for commercial purposes.