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Mineralogical and charge properties of volcanic ash soils from west Sumatra, Indonesia

Four volcanic ash soi1 from two toposequences along Mt Marapi and Mt Talaniau, west Sumatra were studied in order to characterize their mineralogical and charge properties. In all the soils, the silt fraction is composed mainly of gibbsite, cristobalite and feldspars, while the clay fraction is comp...

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Main Authors: Fiantis, Dian, Van Ranst, Eric, Jusop, Shamshuddin
Format: Article
Language:English
Published: Malaysian Society of Soil Science 1998
Online Access:http://psasir.upm.edu.my/id/eprint/49551/1/Mineralogical%20and%20charge%20properties%20of%20volcanic%20ash%20soils%20from%20west%20Sumatra%2C%20Indonesia.pdf
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spelling oai:psasir.upm.edu.my:49551 http://psasir.upm.edu.my/id/eprint/49551/ Mineralogical and charge properties of volcanic ash soils from west Sumatra, Indonesia Fiantis, Dian Van Ranst, Eric Jusop, Shamshuddin Four volcanic ash soi1 from two toposequences along Mt Marapi and Mt Talaniau, west Sumatra were studied in order to characterize their mineralogical and charge properties. In all the soils, the silt fraction is composed mainly of gibbsite, cristobalite and feldspars, while the clay fraction is composed mainly of cristohalite, feldspars and halloysite. Gibbsite is only present in the clay fraction of the soils from Mt Talamau, while opal-A is only found in the clay of the soil from Mt Marapi. Allophane contents, computed from Si and Al extracted by ammonium oxalate and pynophosphate, are lower in the surface horizons than in the subsoil This is related to higher amounts of organic matter in the topsoil Due to higher rainfall, the soils of Mt Talamau are more weathered than those of Mt Marapi. This is reflected by lower allophane and higher ferrihydrite contents in the soils of Mt Talamau. In all the soils, the surface horizons have lower pH,, value than die under lying B-horizons. The AEC is higher in the subsoil than in the topsoil, having values of 0.3 -1.1 cmol, /kg soil. Malaysian Society of Soil Science 1998 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/49551/1/Mineralogical%20and%20charge%20properties%20of%20volcanic%20ash%20soils%20from%20west%20Sumatra%2C%20Indonesia.pdf Fiantis, Dian and Van Ranst, Eric and Jusop, Shamshuddin (1998) Mineralogical and charge properties of volcanic ash soils from west Sumatra, Indonesia. Malaysian Journal of Soil Science, 2. pp. 45-57. ISSN 1394-7990 http://www.msss.com.my/mjss/abs02.htm
institution UPM IR
collection UPM IR
language English
description Four volcanic ash soi1 from two toposequences along Mt Marapi and Mt Talaniau, west Sumatra were studied in order to characterize their mineralogical and charge properties. In all the soils, the silt fraction is composed mainly of gibbsite, cristobalite and feldspars, while the clay fraction is composed mainly of cristohalite, feldspars and halloysite. Gibbsite is only present in the clay fraction of the soils from Mt Talamau, while opal-A is only found in the clay of the soil from Mt Marapi. Allophane contents, computed from Si and Al extracted by ammonium oxalate and pynophosphate, are lower in the surface horizons than in the subsoil This is related to higher amounts of organic matter in the topsoil Due to higher rainfall, the soils of Mt Talamau are more weathered than those of Mt Marapi. This is reflected by lower allophane and higher ferrihydrite contents in the soils of Mt Talamau. In all the soils, the surface horizons have lower pH,, value than die under lying B-horizons. The AEC is higher in the subsoil than in the topsoil, having values of 0.3 -1.1 cmol, /kg soil.
format Article
author Fiantis, Dian
Van Ranst, Eric
Jusop, Shamshuddin
spellingShingle Fiantis, Dian
Van Ranst, Eric
Jusop, Shamshuddin
Mineralogical and charge properties of volcanic ash soils from west Sumatra, Indonesia
author_facet Fiantis, Dian
Van Ranst, Eric
Jusop, Shamshuddin
author_sort Fiantis, Dian
title Mineralogical and charge properties of volcanic ash soils from west Sumatra, Indonesia
title_short Mineralogical and charge properties of volcanic ash soils from west Sumatra, Indonesia
title_full Mineralogical and charge properties of volcanic ash soils from west Sumatra, Indonesia
title_fullStr Mineralogical and charge properties of volcanic ash soils from west Sumatra, Indonesia
title_full_unstemmed Mineralogical and charge properties of volcanic ash soils from west Sumatra, Indonesia
title_sort mineralogical and charge properties of volcanic ash soils from west sumatra, indonesia
publisher Malaysian Society of Soil Science
publishDate 1998
url http://psasir.upm.edu.my/id/eprint/49551/1/Mineralogical%20and%20charge%20properties%20of%20volcanic%20ash%20soils%20from%20west%20Sumatra%2C%20Indonesia.pdf
_version_ 1782722616048484352
score 12.935284

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