00179002

Component

http://onlinepubs.trb.org...s/trr/1977/642/642-002.pdf

https://scholar.google.co...elli&publication_year=1977

This paper discusses the major kinds of soil horizons, their use in Soil Taxonomy, and their significance in engineering soil behavior. The characteristics of the soil in any place are a result of the combined influence of climate and living organisms on a specific kind of parent soil material, conditioned by relief, over a period of time. The combined effect of these factors is reflected in most soils as soil horizons of unique kinds. The presence or absence of kinds of soil horizons is an important criterion in the definition of classes in Soil Taxonomy. Each key soil horizon has a unique morphology that reflects its genesis and composition and a unique behavior due to its properties. Some soil horizons have accumulated clays, organic matter, or iron and other minerals. Other soil horizons have lost such materials. In the classification and mapping of soils the pedologist studies the properties of each soil horizon in situ and, on the basis of this study, selects sites for obtaining samples of soils for characterization in the laboratory. /Author/

Publication of this paper sponsored by Committee on Exploration and Classification of Earth Materials. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.

01411486

pp 6-9

1977

Transportation Research Record

0309026717

Print

Figures (3) ; References (5)

Clay; Climate; Fasteners; Iron; Laboratory tests; Minerals; Morphology; Soil mapping; Soil types

Soil classification; Tees (Structural pieces)

Geotechnology; Highways

TRIS, TRB

Aug 19 1978 12:00AM

• APPLICATION OF SOIL TAXONOMY IN ENGINEERING
• CLAY STRUCTURE AND RATE PROCESS THEORY
• CLIMATIC MATERIALS CHARACTERIZATION OF FINE-GRAINED SOILS
• DESICCATION OF SOILS DERIVED FROM VOLCANIC ASH
• FACTORS THAT AFFECT WATER EROSION FROM CONSTRUCTION AREAS
• PARTICLE SIZE AND MINERALOGY IN SOIL TAXONOMY
• PHYSICOCHEMICAL CONSIDERATIONS IN THERMAL SUSCEPTIBILITY OF A BASE-COURSE MATERIAL (ABRIDGMENT)
• PREDICTION MODEL FOR UNSATURATED HYDRAULIC CONDUCTIVITY OF HIGHWAY SOILS
• RAINFALL FACTORS THAT AFFECT EROSION
• RELATION BETWEEN RESILIENT MODULUS AND STRESS CONDITIONS FOR COHESIVE SUBGRADE SOILS
• SAMPLING A GLACIAL SILTY CLAY
• SOIL MOISTURE AND TEMPERATURE REGIMES IN SOIL TAXONOMY
• SOIL PROPERTIES THAT AFFECT EROSION
• SOIL SERIES AND SOIL TAXONOMY
• SOIL TAXONOMY: AN OVERVIEW