Identificação e caracterização de alguns solos da Estação Experimental de Silvicultura Tropical do INPA

This paper deals with the identification, morphological and analytical characterization of nine soils from the Estação Experimental de Silvicultura Tropical of INPA, located at the Km 45 of the BR-174, between Manaus and Boa Vista. The area lias a isohyperthermic temperature regime and a udic moisture regime. The soil orders found were Ultisol and Oxisol. The Ultisol order has two suborders: Humult with two great groups (Palehumult and Tropohumult) and Udult, with one great group: Paleudult. The Oxisol order has only one suborder (Orthox) with two great groups: Haplorthox and Acrorthox. In the Brazilian soil classification system the soiis belong to the PodzóTico Vermelho Amarelo álico, Latossólico. A moderado, texturas média o argilosa, and Latossolo Amarelo álico, A moderado, textura argilosa. Results from available water during the year suggest, for some soils, this form of water the year over, at a depth of 130 to 270cm. In other soils, like the profiles 3 and 6, no available water is present for 3 months/year.