Here the 1830 edition omitted the of from “the land of Bountiful”; it has never been restored in any subsequent edition, despite its occurrence in both manuscripts. As noted under 1 Nephi 17:7, either reading is possible, although most instances in the text of “the land (of) Bountiful” lack the of. In each case, the critical text will follow the earliest extant reading, thus in this case “the land of Bountiful”.
Summary: Restore in Alma 52:15 the earliest extant reading, “the land of Bountiful”.