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Shabbir A. Shahid, Samira A. S. Omar - Kuwait Soil Taxonomy.pdf
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5.5 Key to Suborders of Aridisols

75

 

 

Haplosalids

Key to Subgroups

Haplosalids that have only a salic horizon and do not have other subsurface diagnostic horizons within the 100 cm of the soil surface. These soils represent the central concept of the great group.

Typic Haplosalids

5.6Key to Suborders of Entisols

Entisols that have less than 35 percent (by volume) rock fragments and a texture class of loamy ne sand or coarser in all layers (sandy loam lamellae are permitted) within the particle-size control section.

Psamments, p. 76

Other Entisols that occur on recent erosional surfaces. As such they typically represent soils that display a high content of rock fragments or shell fragments (exceeding 35% by volume) or a texture of loamy ne sand or ner in any horizon within the 100 cm of the soil surface. The soils are sandy or loamy in texture, are well drained.

Orthents, p. 75

5.6.1 Orthents

Key to Great Groups

Orthents that have an aridic (or torric) soil moisture regime.

Torriorthents, p. 76

76

5 Identification of the Taxonomic Class of a Soil

 

 

Torriorthents

Key to Subgroups

Torriorthents that have:

1.An ECe of more than 8 to less than 30 dS m1 in a layer 10 cm or more thick, within 100 cm of the soil surface: and

Salidic Torriorthents

Torriorthents that lack all other diagnostic characteristics. These are the soils that represent the central concept of the great group. They are typically moderately deep or deep, well drained, gravelly soils.

Typic Torriorthents

5.6.2 Psamments

Key to Great Groups

Psamments that have an aridic (or torric) soil moisture regime and do not have moisture available for plants for long periods.

Torripsamments, p. 76

Torripsamments

Key to Subgroups

Torripsamments that have a lithic contact within 50 cm of the soil surface.

Lithic Torripsamments

5.6 Key to Suborders of Entisols

77

 

 

0 cm

Ak

60 cm

Ck

155 cm

Fig. 5.10 A soil prole showing Typic Torripsamments