Potassium dynamics of a forest soil developed on a weathered schist regolith
Soils of the humid tropics are poor in available potassium due to intensive weathering and leaching of nutrients. A study was conducted to investigate the mineralogy and potassium supplying capacity of a forest soil developed on a weathered schist regolith. The quantity–intensity (Q/I) approach was...
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| Format: | Article |
| Language: | English |
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Taylor & Francis
2013
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| Online Access: | http://psasir.upm.edu.my/id/eprint/30697/1/Potassium%20dynamics%20of%20a%20forest%20soil%20developed%20on%20a%20weathered%20schist%20regolith.pdf |
| _version_ | 1825947758757937152 |
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| author | Jol, Hamdan Ahmed, Osumanu Haruna |
| author_facet | Jol, Hamdan Ahmed, Osumanu Haruna |
| author_sort | Jol, Hamdan |
| collection | UPM |
| description | Soils of the humid tropics are poor in available potassium due to intensive weathering and leaching of nutrients. A study was conducted to investigate the mineralogy and potassium supplying capacity of a forest soil developed on a weathered schist regolith. The quantity–intensity (Q/I) approach was used in thisstudy. The schist regolith showed deep weathering and intense leaching throughout the profile, resulting in low cation exchange capacity (CEC) and available K in soil and saprolite layers. The mineralogy of the regolith was dominanted by kaolinite, gibbsite and goethite. Feldspar, mica and mica–smectite minerals were observed in the lower saprolite layers. The Q/I parameters showed that the soils and saprolites were low in K supply power. This observation was attributed to weathering and intense leaching. The free energy values of K replacement (ΔG r°) also suggest that soils and saprolites of the schist regolith were deficient in K. The Q/I parameters significantly correlated with organic carbon and clay content, CEC, pH and exchangeable K. |
| first_indexed | 2024-03-06T08:18:21Z |
| format | Article |
| id | upm.eprints-30697 |
| institution | Universiti Putra Malaysia |
| language | English |
| last_indexed | 2024-03-06T08:18:21Z |
| publishDate | 2013 |
| publisher | Taylor & Francis |
| record_format | dspace |
| spelling | upm.eprints-306972015-10-05T06:59:05Z http://psasir.upm.edu.my/id/eprint/30697/ Potassium dynamics of a forest soil developed on a weathered schist regolith Jol, Hamdan Ahmed, Osumanu Haruna Soils of the humid tropics are poor in available potassium due to intensive weathering and leaching of nutrients. A study was conducted to investigate the mineralogy and potassium supplying capacity of a forest soil developed on a weathered schist regolith. The quantity–intensity (Q/I) approach was used in thisstudy. The schist regolith showed deep weathering and intense leaching throughout the profile, resulting in low cation exchange capacity (CEC) and available K in soil and saprolite layers. The mineralogy of the regolith was dominanted by kaolinite, gibbsite and goethite. Feldspar, mica and mica–smectite minerals were observed in the lower saprolite layers. The Q/I parameters showed that the soils and saprolites were low in K supply power. This observation was attributed to weathering and intense leaching. The free energy values of K replacement (ΔG r°) also suggest that soils and saprolites of the schist regolith were deficient in K. The Q/I parameters significantly correlated with organic carbon and clay content, CEC, pH and exchangeable K. Taylor & Francis 2013 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/30697/1/Potassium%20dynamics%20of%20a%20forest%20soil%20developed%20on%20a%20weathered%20schist%20regolith.pdf Jol, Hamdan and Ahmed, Osumanu Haruna (2013) Potassium dynamics of a forest soil developed on a weathered schist regolith. Archives of Agronomy and Soil Science, 59 (4). pp. 593-602. ISSN 0365-0340; ESSN: 1476-3567 10.1080/03650340.2012.663489 |
| spellingShingle | Jol, Hamdan Ahmed, Osumanu Haruna Potassium dynamics of a forest soil developed on a weathered schist regolith |
| title | Potassium dynamics of a forest soil developed on a weathered schist regolith |
| title_full | Potassium dynamics of a forest soil developed on a weathered schist regolith |
| title_fullStr | Potassium dynamics of a forest soil developed on a weathered schist regolith |
| title_full_unstemmed | Potassium dynamics of a forest soil developed on a weathered schist regolith |
| title_short | Potassium dynamics of a forest soil developed on a weathered schist regolith |
| title_sort | potassium dynamics of a forest soil developed on a weathered schist regolith |
| url | http://psasir.upm.edu.my/id/eprint/30697/1/Potassium%20dynamics%20of%20a%20forest%20soil%20developed%20on%20a%20weathered%20schist%20regolith.pdf |
| work_keys_str_mv | AT jolhamdan potassiumdynamicsofaforestsoildevelopedonaweatheredschistregolith AT ahmedosumanuharuna potassiumdynamicsofaforestsoildevelopedonaweatheredschistregolith |