To Jim Buckle and his girlfriend, Wendy Mainardi, the land in Dighton, in the southeast corner of the state, was run down, but a dream come true, and a place to establish Buckle Farm. For seven years, Buckle, 35, was head farmer at Allandale Farm, where Mainardi, 29, wrangled 25 beehives to harvest 200 pounds of honey last year. The couple is well known in the restaurant, farming, and locavore communities in Boston, particularly in Jamaica Plain, where they still live, because the pair sells fresh vegetables around town, and donates produce to a hunger program. And they’re passionate about what they do.