THESAURUS
grass roots
agricultural region, arable land, beginning, black belt, citrus belt, commencement, conception, corn belt, cotton belt, countryside, derivation, dust bowl, farm belt, farm country, farmland, fruit belt, genesis, grassland, grazing region, head, highlands, inception, lowlands, meadows and pastures, moors, origin, original, origination, plains, prairies, provenience, province, provinces, radical, radix, rise, root, rural district, rustic region, source, stem, steppes, stock, taproot, the country, the soil, the sticks, tobacco belt, uplands, veld, wheat belt, wide-open spaces, woodland, woods and fields, yokeldom