Characteristic, Pedogenesis and Classification of Spodosols- like in Northern Taiwan
| Autor: | Yang, Jia-hong, 楊家宏 |
|---|---|
| Rok vydání: | 1993 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 81 Spodosols are often formed in the humid and cold climate conditions and in the coniferous forest regions. It is easily to happen the Eluviation and Illuviation processess. Podzolic Soil were not all the Spodosols in the Soil Taxonomy. In the Spodosols of the world, thematerials in the upper layer of Spodosols with coarse texture and lowclay content are easily to be eluviated to the lower part of thepedons. In Taiwan, Podzolic Soils can be easily found in the mediumand high elevations of forest soils. The study regions of this studyare dominantly located in the I-Lan region, including Tai-Ping Moun-tain, Chi-Lain Mountain, and some regions of new Middle Cross-IslandRoad. Twelve soil pedons were selected in this study with the eleva-tion higher than 2000 meters, climatic characters with humid and cold condi- tions and precipitation higher than 2000 mm. The other ten soil pedons are selected from Taman Mountain and Lala Mountain. The objectives of thes study are (1)to study the formation processes and kinds of the soils, and (2) to investigate the suitability of criteria in Spodosols used in Taiwan, such as organic carbon, ODOE value, soil color, and oxalate extractable iron and alumium contents. There is no any soil pedon can be classified as Spodosols based on the morphological characters defined in the keys to Soil Taxonomy in 1992. But, there are some soil pedons can be classified as Spodosols based on the chemical criteria defined in the keys to Soil Taxonomy in 1992. The differences in the classification of tested soil pedons are significantly related to high clay contents in the soil pedons, landscape position of microrelief, and vegetation types. In summary, the pedogenic processes of the selected soil pedons have the tendency of podzolization, and the iron and aluminum can be eluviation easily with organic materials. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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