HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Ping, C. L. Articles by Ito, T. Search for Related Content PubMed Articles by Ping, C. L. Articles by Ito, T. Agricola Articles by Ping, C. L. Articles by Ito, T.

Properties and Classification of Three Volcanic Ash-derived Pedons from Aleutian Islands and Alaska Peninsula, Alaska

Agric. and For. Exp. Stn., Palmer Res. Center, Univ. of Alaska, Dep. of Agronomy, Fairbanks, 533 E. Fireweed, Palmer, AK 99645

S. Shoji and T. Ito

Dep. of Agronomy, Tohoku Univ., Sendai, 980, Japan

* Corresponding author.

ABSTRACT

Three soils formed from volcanic ash on the Aleutian Islands and adjacent Alaska Peninsula were characterized and classified according to Soil Taxonomy to test some of its recent revisions. All three soils have bulk density <0.9 Mg M^–3, acid-oxalate extractable Al of 15 to 25 g kg^–1, phosphate retention >90%, and sand fraction dominated by volcanic glass. These properties meet the andic soil properties and qualify for the provisional Andisol order as defined by the International Committee on the Classification of Andisols (ICOMAND). However, two of the three pedons also meet the laboratory criteria for Spodosols. Soil colloids of all the pedons are allophanic, showing the predominance of allophane and Al-humus in the surface horizons and that of allophane in the subsurface horizons. Laminar opaline silica is present in the surface and subsurface horizons. This fact strongly suggests that concentration of silica by freezing of soil solution is a process for the formation of laminar opaline silica in the subsurface horizons having highly reactive Al. Chloritized 2:1 minerals are found to be major crystalline clays throughout the profiles of all the pedons. In addition, zeolite is present in one pedon, indicating that the parent ash contains hypothermally altered material. The apparent overlap in the definitions of Spodosols and the provisional Andisol order is also discussed.

Contribution from Agricultural and Forestry Exp. Stn., School of Agriculture and Land Resources Management, Univ. of Alaska, Fairbanks. Paper no. J-183. (Hatch Project.) Portions of this paper were presented at the SSSA annual meeting, Div. S-5, New Orleans, 1–5 Dec. 1986.

Received for publication April 6, 1987.

This article has been cited by other articles:

				F. Zehetner, W. P. Miller, and L. T. West Pedogenesis of Volcanic Ash Soils in Andean Ecuador Soil Sci. Soc. Am. J., November 1, 2003; 67(6): 1797 - 1809. [Abstract] [Full Text] [PDF]

				O. Arnalds and J. Kimble Andisols of Deserts in Iceland Soil Sci. Soc. Am. J., November 1, 2001; 65(6): 1778 - 1786. [Abstract] [Full Text] [PDF]

				D.D. Poudel and L.T. West Soil Development and Fertility Characteristics of a Volcanic Slope in Mindanao, the Philippines Soil Sci. Soc. Am. J., September 1, 1999; 63(5): 1258 - 1273. [Abstract] [Full Text]