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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| Format: | Article |
| Language: | English |
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Malaysian Society of Soil Science
1998
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| 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 |
| _version_ | 1825930156010635264 |
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| author | Fiantis, Dian Van Ranst, Eric Jusop, Shamshuddin |
| author_facet | Fiantis, Dian Van Ranst, Eric Jusop, Shamshuddin |
| author_sort | Fiantis, Dian |
| collection | UPM |
| 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. |
| first_indexed | 2024-03-06T09:07:19Z |
| format | Article |
| id | upm.eprints-49551 |
| institution | Universiti Putra Malaysia |
| language | English |
| last_indexed | 2024-03-06T09:07:19Z |
| publishDate | 1998 |
| publisher | Malaysian Society of Soil Science |
| record_format | dspace |
| spelling | upm.eprints-495512016-12-30T03:12:00Z 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 |
| spellingShingle | Fiantis, Dian Van Ranst, Eric Jusop, Shamshuddin Mineralogical and charge properties of volcanic ash soils from west Sumatra, Indonesia |
| title | 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_short | 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 |
| url | 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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