Litosol: suas características e provável gênese

  • Z.Z. Marcos USP; Escola Superior de Agricultura Luiz de Queiroz; Centro de Estudos de Solos
  • T. Kinjo USP; Escola Superior de Agricultura Luiz de Queiroz; Centro de Estudos de Solos

Resumo

Some of the characteristics peculiar to Litosois are discussed based on data published on Litosois occurring in the States of São Paulo and Paraná. Litosois are the first stages of development of a soil. Litosois probably originate through the exposure of the rockbed caused by an excessive relief. Rock weathering processes are intensive, prevailing those of chemical nature rather than those processes in which physical phenomena dominate. The A horizon has a high organic matter content (2% to 10%). Silt and clay amount to approximately 50% of the fine earth in the A horizon, with the exception of Litosois originated from sandstone and granite. The SiO2/Al2O3 relationship of the soil's colloidal complex and the clay's cation exchange capacity indicate that it is quite probable the presence of 2:1 type clay in Litosois derived from basic rocks.

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Publicado
1966-12-31
Como Citar
Marcos, Z., & Kinjo, T. (1966). Litosol: suas características e provável gênese . Anais Da Escola Superior De Agricultura Luiz De Queiroz, 24, 343-352. https://doi.org/10.1590/S0071-12761967000100032
Seção
naodefinida