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This paper aims to make a socioeconomic analysis over rural settlements in the extreme south of Bahia and in Pontal do Paranapanema in São Paulo state. Its emphasis is on cassava agrobiodiversity. Semi-structured interviews were conducted with fifteen farmers in ten settlements in Bahia and eleven farmers in seven settlements in São Paulo. Those regions socioeconomic levels are among the lowest in their states, with major vulnerability in Bahia. About 60% of farmers's children live in the settlement, two thirds of them work on agricultural activities. Composed mainly by elderly population, settlements in Bahia represent most of cassava diversity, whose production provides to the artisanal flour production flour. The cultural dynamics over the flour production activities in the settlements constitute a key element in the region's agrobiodiversity maintenance. The Pontal's cassava production on the other hand, answers to the demand of industrial starch outside the settlements, which causes the growing of few varieties that answer to the industrial standards. The Bahia settlements' agroecological perspective has been fundamental to its agrobiodiversity enhancement while the industrial agriculture perspective endorsed in São Paulo's region weakens the agricultural diversity as well as its sociocultural structures associated with the agrobiodiversity maintenance. [ABSTRACT FROM AUTHOR]