02586nab a2200373 i 4500 BR-BrBNA 20240311145014.0 240311b2023 bl.ar|pooa||| 00| 0 eng | BR-BrBNA eng P33 P35 P01 Camara, Rodrigo Silva, Luciélio Manoel Frade Junior, Elizio Ferreira Mattar, Eduardo Pacca Luna Silva, Sandra Bezerra da Silva Neto, Eduardo Carvalho da Pereira, Marcos Gervasio Impact of land use on the chemical attributes of the soil, Cruzeiro do Sul, in the Brazilian Amazon Publicação on-line; 34 ref.; 3 tables; 3 illus.; Summary (En) 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. USO DA TERRA ANÁLISE DO SOLO PROPRIEDADE FÍSICO-QUÍMICA MÉTODO ESTATÍSTICO FERTILIDADE DO SOLO IMPACTO AMBIENTAL AMAZÔNIA 4290 275636 Fortaleza-CE Universidade Federal do Ceará. Centro de Ciências Agrárias 2002 2023-437436 Revista Ciência Agronômica (Brazil) 0045-6888; 1806-6690 (on-line) v. 54 p. 1-13; (2023) BR2023002385 https://www.scielo.br/j/rca/a/dGn8rYhJGcV88qcRS8MsYkQ/?format=pdf&lang=en Analítico 298738 298738