ISSN:0022-4588    

DOI:10.1111/j.1365-2389.1956.tb00856.x

出版商:Blackwell Publishing Ltd    

年代:1956

数据来源: WILEY

摘要:

SummaryA reconnaissance soil survey of an area of 160 sq. km. (60 sq. miles) was made in central Vestspitsbergen and the distribution of soils interpreted as a catena in which denudation has a more prominent role than in temperate regions; the more important soil characters were related to slope. The paper includes some observations on solifluction, polygonal soils, and perennially frozen ground. Finally the soils described are tentatively named according to the classifications of Kellogg&Nygard, and Kubiena.

ISSN:0022-4588    

DOI:10.1111/j.1365-2389.1956.tb00857.x

出版商:Blackwell Publishing Ltd    

年代:1956

数据来源: WILEY

摘要:

SummaryA field and laboratory study was made of soils developed in the alpine region of the Rocky Mountains. The region is a grassland above the general elevations of 10,500 ft. in Wyoming, 11,500 ft. in southern Colorado. Cold inhibits soil development.Three groups of soils occur. Their gross characteristics are determined by drainage and variations in parent rocks from which the soils developed. The groups are described and given the names of Alpine Turf, Alpine Meadow, and Alpine Bog soils.Only the Alpine Turf soils were studied in the laboratory. They are characterized by an organic‐carbon content of 5–20 per cent. in the surface 5–7 in. and coarse, gravelly, or sandy textures throughout. The largest amounts of sift and clay occur in the surface. The range in pH is from 4.5 to 8.4, depending on the kind of parent rock, but no marked variations occur in any horizon of any soil. Preliminary studies revealed the presence of some of the common clay minerals in the fine soil fractions. This was taken as evidence that these soils are starting on the nonnal course of soil development. The morphology is simple, consisting of an A‐B‐C profile. Horizons are more distinct in the turf soil than in either the meadow or

ISSN:0022-4588    

DOI:10.1111/j.1365-2389.1956.tb00858.x

出版商:Blackwell Publishing Ltd    

年代:1956

数据来源: WILEY

ISSN:0022-4588    

DOI:10.1111/j.1365-2389.1956.tb00859.x

出版商:Blackwell Publishing Ltd    

年代:1956

数据来源: WILEY

ISSN:0022-4588    

DOI:10.1111/j.1365-2389.1956.tb00860.x

出版商:Blackwell Publishing Ltd    

年代:1956

数据来源: WILEY

ISSN:0022-4588    

DOI:10.1111/j.1365-2389.1956.tb00861.x

出版商:Blackwell Publishing Ltd    

年代:1956

数据来源: WILEY

ISSN:0022-4588    

DOI:10.1111/j.1365-2389.1956.tb00862.x

出版商:Blackwell Publishing Ltd    

年代:1956

数据来源: WILEY

摘要:

SummaryThe ability of the soil surface to accept continuous heavy rainfall is a critical factor in the prevention of accelerated erosion of tropical soils. The qualities required in the soil are complex, and are not easily inferred from simple laboratory measurements. A direct test has therefore been developed for this property. Large soil cores of undisturbed structure are brought to a standard moisture tension, and are subjected to heavy artificial rainfall of controlled drop‐size and intensity. The drainage tension is maintained at a constant value, and the rate of infiltration is measured. The apparatus is described in detail. Examples of results from a tropical rotation experiment are given, in comparison with porespace and percolation measurement

ISSN:0022-4588    

DOI:10.1111/j.1365-2389.1956.tb00863.x

出版商:Blackwell Publishing Ltd    

年代:1956

数据来源: WILEY

ISSN:0022-4588    

DOI:10.1111/j.1365-2389.1956.tb00864.x

出版商:Blackwell Publishing Ltd    

年代:1956

数据来源: WILEY

ISSN:0022-4588    

DOI:10.1111/j.1365-2389.1956.tb00865.x

出版商:Blackwell Publishing Ltd    

年代:1956

数据来源: WILEY