SciELO - Scientific Electronic Library Online

vol.11 issue1-3Efeito da frequência e severidade de corte das fôlhas sobre a duração de vida do sisalEnsaio de variedades de cafeeiros III author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand




Related links



Print version ISSN 0006-8705


CATANI, Renato A.. Identificação microquímica de minerais primários de potássio no solo. Bragantia [online]. 1951, vol.11, n.1-3, pp.23-28. ISSN 0006-8705.

This paper reports a study, from a chemical arid microcheniical point of view, of the soil potassium in the type of soil originating from the Arenito Bauru. A mechanical separation of the soil was carried out in order to study the potassium distribution in the soil. The fractions 0.250 to 0.105 mm, 0.105 to 0.053 mm, 0.053 to 0.020 mm, 0.020 to 0.010 mm and 0.010 to 0.002 mm were isolated. The chemical data, i. e., the exchangeable and the total potassium content pointed out the occurrence of primary minerals of potassium in the fractions, 0.250 to Ò.105 mm, 0.105 to 0.053 mm and 0.053 to 0.020 mm. A simple microchemical technique was performed by which it was possible to differentiate the potassium bearing mineral from quartz, ilmenite, magnetite and other minerals. Primary minerals of potassium were found in those fractions and this fact indicated that the total potassium content in the samples studied was due to the presence of those minerals.

        · text in Portuguese     · Portuguese ( pdf )


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