Camara, Rodrigo creator Silva, Luciélio Manoel creator Frade Junior, Elizio Ferreira creator Mattar, Eduardo Pacca Luna creator Silva, Sandra Bezerra da creator Silva Neto, Eduardo Carvalho da creator Pereira, Marcos Gervasio creator text periodical abstract or summary bl. continuing eng ABSTRACT - Vast areas of the Brazilian Amazon have been deforested for the expansion of livestock and the agricultural frontier, which has resulted in soil exhaustion. It is therefore urgent to reduce deforestation and encourage sustainable land use to promote social and economic development in the region. The aim of this study was to evaluate the impact of different land use systems (an agroforestry system, cassava cultivation, non-degraded pasture, native forest) on the chemical properties of the soil (0-40 cm) in the mesoregion of the Juruá Valley, in the state of Acre, Brazil. Principal component analysis showed the soil in the forested area (reference) has greater values for P, Ca2+, Mg2+, K+, Na+, sum of bases, and cation exchange capacity; while hierarchical cluster analysis suggested little dissimilarity to the soil in the agroforestry system, and high dissimilarity to the soil in the areas of cassava cultivation and pasture. The results therefore support agroforestry as the most sustainable land use system, compared to cassava cultivation or pasture. Key words: Soil fertility. Amazon Rainforest. Cassava cultivation. Pasture. Multivariate analysis. Publicação on-line; 34 ref.; 3 tables; 3 illus.; Summary (En) USO DA TERRA ANÁLISE DO SOLO PROPRIEDADE FÍSICO-QUÍMICA MÉTODO ESTATÍSTICO FERTILIDADE DO SOLO IMPACTO AMBIENTAL AMAZÔNIA Fortaleza-CE Universidade Federal do Ceará. Centro de Ciências Agrárias 2002 2023-437436 0045-6888; 1806-6690 (on-line) BR2023002385 v. 54 p. 1-13; (2023) https://www.scielo.br/j/rca/a/dGn8rYhJGcV88qcRS8MsYkQ/?format=pdf&lang=en https://www.scielo.br/j/rca/a/dGn8rYhJGcV88qcRS8MsYkQ/?format=pdf&lang=en BR-BrBNA 240311 20240311145014.0 eng