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The objective of this work is to neutralize the effect of exchangeable acidity of a RED - YELLOW ARGISOIL dystrophic incubated with application of increasing doses of CaCO 3 . This work was performed at the Laboratory of Soil Science UEMA / CESI . Soil samples were collected in a RED-YELLOW ARGISOIL dystrophic in Exhibition Park of Imperatriz/MA , at 0-20 cm depth . After collecting the samples, they were carried to the laboratory, air-dried, then broken, passed through a sieve of 2 mm mesh size and mixed and routed to the soil laboratory for routine analysis. Soil samples were placed hatching increasing doses of calcium carbonate equivalent to 0 , 1 , 2 , 3 , 4 , 5 , 8 and 10 t.ha -1 ( CaCO 3 ), with ten repetitions , in a completely randomized design . A fter 30 days the start of incubation was taken from each experimental samples to determine the exchangeable acidity ( Al 3 + ), in order to determine the equation of the curve and the neutralization of soil analysis . There were significant differences between treatments with respect to Al 3+ . The amount used to neutralize the exchangeable acidity determined by the regression equation for the study of soil in Exhibition Park of Imperatriz/MA was 8,8 t.ha -1 of CaCO 3 . KEYWORDS: Aluminum. Neutralization curve . Production .

INCUBAÇÃO DE ARGISSOLO VERMELHO AMARELO distrófico COM APLICAÇÃO DE DOSES CRESCENTES DE CaCO3 PARA NEUTRALIZAÇÃO DA ACIDEZ TROCÁVEL