HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Anjos, L. H. Articles by Franzmeier, D. P. Search for Related Content PubMed Articles by Anjos, L. H. Articles by Franzmeier, D. P. GeoRef GeoRef Citation Agricola Articles by Anjos, L. H. Articles by Franzmeier, D. P.

Landscape and Pedogenesis of an Oxisol-Inceptisol-Ultisol Sequence in Southeastern Brazil

Soils Dep., UFRRJ, Seropédica, RJ, Brazil 23890-000

D. P. Franzmeier

Agronomy Dep., Purdue Univ., West Lafayette, IN 47907

*Corresponding author (lanjos{at}ufrrj.br).

ABSTRACT

The topographic sequence of Oxisols, Inceptisols, and Ultisols is frequently observed in tropical hilly surfaces in the southeastern region of Brazil. The purpose of this study was to relate pedogenesis to major geomorphic surfaces (MGS) in the Caetés watershed, located in Paty do Alferes, Rio de Janeiro State. The landscape is characterized by steep bedrock hills and cliffs of pre-Paleozoic gneiss, granite, and related metamorphic rocks rising above long, nearly level, accordant ridge crests, convex hills, and narrow fluvial plains. Intense soil development, with deep weathering and kaolinite formation in the gneiss-granite rock, took place on the ridges and convex hills. Six pedons were examined using field investigation and laboratory soil characterization techniques. The degree of pedogenesis on the various geomorphic surfaces supports the landscape evolution theories of Penck and King. A Typic Hapludox, with the greatest degree of pedogenesis, formed on the stable summit position, MGS1. The upper part of the retreating slope, MGS2, bevels MGS1, and the material eroded from MGS2 moved downslope and formed a surface with lower gradient, MGS3. Dystrochrepts are on shoulder positions and shallow Hapludox are on backslope positions of the geomorphic surface MGS2, and Kandiudults formed on footslopes, MGS3. Eutrochrepts are on the youngest surface MGS4, a toeslope position.

Purdue Univ. Agric. Res. Programs Journal Paper no. 15497. Supported in part by CAPES/CNPQ program, Brizil, and EMBRAPA/CNPS-CEE.

Received for publication August 11, 1997.

This article has been cited by other articles:

				W. WIRIYAKITNATEEKUL, A. SUDDHIPRAKARN, I. KHEORUENROMNE, M. N. SMIRK, and R. J. GILKES Iron oxides in tropical soils on various parent materials Clay Minerals, December 1, 2007; 42(4): 437 - 451. [Abstract] [Full Text] [PDF]

				S. Imhoff, A. P. da Silva, and A. Dexter Factors Contributing to the Tensile Strength and Friability of Oxisols Soil Sci. Soc. Am. J., September 1, 2002; 66(5): 1656 - 1661. [Abstract] [Full Text] [PDF]