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Genesis and classification of three ...

King, Hen Biau.

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Genesis and classification of three forest soils in central Taiwan.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Genesis and classification of three forest soils in central Taiwan./
作者:	King, Hen Biau.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 1990,
面頁冊數:	234 p.
附註:	Source: Dissertation Abstracts International, Volume: 52-11, Section: B, page: 5725.
Contained By:	Dissertation Abstracts International52-11B.
標題:	Geology. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=NN60448
ISBN:	9780315604483

Genesis and classification of three forest soils in central Taiwan.
King, Hen Biau.

Genesis and classification of three forest soils in central Taiwan. - Ann Arbor : ProQuest Dissertations & Theses, 1990 - 234 p.

Source: Dissertation Abstracts International, Volume: 52-11, Section: B, page: 5725.

Thesis (Ph.D.)--Carleton University (Canada), 1990.

This investigation represents the first detailed study of the genesis and classification of forest soil pedons in the mountains of Central Taiwan. Three pedons, developed from the most common bedrock materials (Tertiary shales, siltstones and sandstones) have been studied. These pedons developed under a subtropical climatic regime and warm-temperate montane rain forest vegetation at about 700 m a.s.l.

ISBN: 9780315604483Subjects--Topical Terms:

516570
Geology.

Genesis and classification of three forest soils in central Taiwan.
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245 1 0 $a Genesis and classification of three forest soils in central Taiwan.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 1990
300 $a 234 p.
500 $a Source: Dissertation Abstracts International, Volume: 52-11, Section: B, page: 5725.
502 $a Thesis (Ph.D.)--Carleton University (Canada), 1990.
520 $a This investigation represents the first detailed study of the genesis and classification of forest soil pedons in the mountains of Central Taiwan. Three pedons, developed from the most common bedrock materials (Tertiary shales, siltstones and sandstones) have been studied. These pedons developed under a subtropical climatic regime and warm-temperate montane rain forest vegetation at about 700 m a.s.l.
520 $a Pedon 1, a "Typic Dystrochrept, fine, vermiculitic, thermic", developed on fine siltstones on 2% slopes. Melanization and loosening have occurred, and braunification has produced a cambic Bw horizon.
520 $a Pedon 2, a "Typic Dystrochrept, fine, illitic, thermic", developed on shales on $>$60% slopes. Melanization, loosening and braunification (to produce a cambic Bw horizon) have occurred. Iron concretions, of pedogenic origin, are found in this soil and indicate that translocation and transformation processes involving iron oxides are active. These concretions, singly and in clusters (up to 40 cm across), distribute between 30 and 100 cm depth, have round to subangular polygonal structure and contain a grey matrix surrounded by two iron-rich layers. The inner dark reddish-brown layer is composed of 62% Fe$\sb2$O$\sb3$ (about equally hematite and geothite). It contains higher concentrations of Fe, Mn and Ca than the soil matrix. The outer reddish-yellow layer is composed of 15% Fe$\sb2$O$\sb3$, (92% is geothite). Only Fe and Zn contents are consistently greater in this layer than in the soil matrix. Ferrans (up to 600 um thick), which may or may not be coated with ferri-argillans, are found in the planar voids of iron concretion clusters. These features indicate that translocation of iron and clay are active processes. A "life-cycle" for the iron concretions, which may explain their formation and destruction (based on the balance of erosion, Fe mobilization and reprecipitation at the site), is proposed. The name "shell concretions" is proposed for those structures, which are unlike any concretions previously described from soils.
520 $a Pedon 3, a "Typic Hapludult, fine-loamy, siliceous, thermic", developed on sandstones on $>$60% slopes. Melanization, loosening and lessivage (to produce an argillic Bt horizon) have occurred.
520 $a This investigation reveals the dominant soil forming factors and pedogenic processes of forest soils in the studied area and also demonstrates the utility of Soil Taxonomy for application to classifying forest soils in the mountains of central Taiwan.
590 $a School code: 0040.
650 4 $a Geology. $3 516570
650 4 $a Forestry. $3 895157
690 $a 0372
690 $a 0478
710 2 $a Carleton University (Canada). $3 1018407
773 0 $t Dissertation Abstracts International $g 52-11B.
790 $a 0040
791 $a Ph.D.
792 $a 1990
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=NN60448