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Soils

Acrisol are formed by the alteration of the basaltic-andesitic lava. Erosion eroded the organic horizon. Actually, soils have at least 80 cm deep, clayish (60 a 75% clay), presenting a Bw between 40-70 cm full of Fe and Mn deposits due to the presence of water table, Bt between 70-120 cm with prismatic structure without any deposits of Fe and Mn, C > 120 cm pH 5,5, MO 4%, Da 1,3, hydraulic conductivity very low (< 1cm/h).