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- W2320579167 abstract "Superficial processes involving erosion, transport and deposition of materials, as well as internal pedogenic processes play a role in soil differentiation on the landscape, and are influenced largely by the relief. In this study, we aimed to identify relationships among geomorphic surfaces, hillslope segments, soil erosion and soil attributes of a toposequence in the municipality of Jardinopolis, Sao Paulo state, Brazil. Three geomorphic surfaces and five hillslope segments were identified and characterized: top, scarp, shoulder, stocking lean and inferior lean. Six trenches were opened along the hillslopes for soil horizon identification, morphologic description and soil classification. We observed soils of sandy texture in geomorphic surface I going to soils of clayey texture in geomorphic surface III. The soil values of SB, CEC and V% increase from G.S. I to G.S. III according to the sandstone-basalt lythosequence. Soil erodibility (K) decreases from geomorphic surface I to III, while losses (A and A*) show contrary behavior, increasing from geomorphic surface I to III, that is, from soils developed in sandstone to basaltic soils. RESUMO: Processos superficiais envolvendo erosao, transporte e deposicao de materiais, como tambem processos internos, pedogeneticos, atuam na diferenciacao dos solos na paisagem, condicionados em grande parte pelo relevo. Neste trabalho, objetivou-se identificar as relacoes das superficies geomorficas e dos segmentos de vertentes com a erosao e os atributos dos solos, em Jardinopolis-SP. Foram identificadas tres superficies geomorficas e cinco segmentos da vertente: topo (arenito), ombro (arenito/basalto), meia encosta (arenito/ basalto), escarpa (basalto) e encosta inferior (basalto). Foram abertas seis trincheiras a partir do espigao da vertente no sentido do declive mais suave das vertentes, para a identificacao dos horizontes, a descricao morfologica e a classificacao dos solos. Observaram-se solos com textura arenosa da superficie geomorfica I passando para a textura argilosa na superficie geomorfica III. Verificaram-se solos com valores crescentes de SB, CTC e V%, partindo da S.G. I para a S.G. III, em funcao da litologia de arenito transicionando para basalto. A erodibilidade (K) dos solos diminui da superficie geomorfica I para a III, enquanto que as perdas (A e A*) apresentam comportamento contrario, aumentando da superficie geomorfica I para a III, ou seja, de solos desenvolvidos sob arenito para solos de origem basaltica. Geomorphic surface and estimation of soil erosion on a sandstone-basalt substratum of a toposequence in Jardinopolis, Sao Paulo state, Brazil Superficies geomorficas e erosao do solo estimada em topossequencia desenvolvida sobre arenito-basalto na regiao de Jardinopolis, SP Milton Cesar Costa Campos1* Jose Marques Junior2 Marcilio Vieira Martins Filho2 Zigomar Menezes Souza3 Rafael Correia Trajano Borges2 1Universidade Federal do Amazonas – UFAM, Instituto de Educacao, Agricultura e Ambiente, Rua 29 de Agosto, 786, Divino Pranto, 69800-000, Humaita, AM, Brasil 2Universidade Estadual Paulista – UNESP, Faculdade de Ciencias Agrarias e Veterinarias, Via de Acesso Prof. Paulo Donato Castelane, s/n, Rural, 14884-900, Jaboticabal, SP, Brasil 3Universidade Estadual de Campinas – UNICAMP, Faculdade de Engenharia Agricola, Departamento de Agua e Solo, Av. Candido Rondon, 501, Barao Geraldo, CP 6011, 13083-875, Campinas, SP, Brasil Autor Correspondente: *E-mail: mcesarsolos@gmail.com" @default.
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- W2320579167 date "2013-01-01" @default.
- W2320579167 modified "2023-10-14" @default.
- W2320579167 title "Geomorphic surface and estimation of soil erosion on a sandstone-basalt substractum of a toposequence in Jardinópolis São Paulo" @default.
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- W2320579167 doi "https://doi.org/10.4322/rca.2013.033" @default.
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