SciELO - Scientific Electronic Library Online

vol.46 issue2Relative efficiency of different particles sizes of limestone in neutralizing soil acidityInfluence of packing, storage and drying process on the results of soil chemical analysis related to soil fertility author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand




Related links


Anais da Escola Superior de Agricultura Luiz de Queiroz

Print version ISSN 0071-1276On-line version ISSN 2316-8935


MOREIRA, E.G.S.; DEMATTE, J.L.I.  and  MARCONI, A.. Characterization and genesis of a natrustalf from the central region of Ceara state. An. Esc. Super. Agric. Luiz de Queiroz [online]. 1989, vol.46, n.2, pp.319-341. ISSN 0071-1276.

This study was carried out with the objective of obtaining information on the characteristics and genesis of three pedons of a Typic Natrustalf located in the semi arid region of Brazil. These soils are relatively shallow with an abrupt textural change, have a poor drainase and a very developed natric horizon. The surficial horizons are very sandy originated by a reworked material. The natric horizon has a clay content around 25% characterized by a very strong blocky or colunar structure. The clay fraction of these soils is constituted basically bi 2:1 clay minerals like micas, vermiculite and smectite. Some calcium plagioclase and kaolinite does occur. In the coarser fraction occurs minerals like calcite, calcium plagioclase, hornblend and quartz.

Keywords : Natrustalf; Mineralogy.

        · abstract in Portuguese     · text in Portuguese     · Portuguese ( pdf epdf )


Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License