Dissertação
Identificação do limite entre solo e saprolito em argissolos bruno-acinzentados derivados de rochas sedimentares
Fecha
2012-02-12Registro en:
OLIVEIRA, Rodrigo Bomicieli de. Identification of the boundary between soil and saprolite in argissolos bruno-acinzentados derivatived from sedimentary rocks. 2012. 74 f. Dissertação (Mestrado em Agronomia) - Universidade Federal de Santa Maria, Santa Maria, 2012.
Autor
Oliveira, Rodrigo Bomicieli de
Institución
Resumen
The Argissolos (Ultisols and Alfisols) derived from sedimentary rocks occur in the region of Central Depression of the Rio Grande do Sul state, over siltstones and sandstones in the soft wavy reliefs. These soils are predominantly shallow, which gives greater importance to its deep layers. These layers have often been inadequately described in the fields due to the difficulty in interpreting the contact between the soil and saprolite. Moreover, the horizon/layer C has been the subject of disagreement among researchers as yet be considered either saprolite and soil. In this sense, the objective of this study was to analyze different profiles of Argissolos derived from sedimentary material of the the Sanga do Cabral and Santa Maria - Member Alemoa formations, located between the Santa Maria and Sao Pedro do Sul town. This research focused on a morphological, a physical and chemical characteristics of the soils profiles. The results showed two situations: the C is a horizon that has a development showing strong evidence of pedogenesis, with morphology, physical and chemical behavior similar to the Bt horizon, and C is a transition layer between the saprolite (Cr) and soil (Bt), independent of both, but with the possibility of interconnections with them.