Any farm of at least one Ackernahrung, area of land large enough to support a family and evaluated from 7.5 to 125 hectares (19–309 acres), was declared hereditary as an Erbhof, to pass from father to son, and could not be mortgaged or alienated, and only these farmers were entitled to call themselves Bauern or "farmer peasant", a term the Nazis attempted to refurbish from a neutral or even pejorative to a positive term.[3][4]