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WALLACE H. FULLER
B. CAMBIC
The cambic horizon is an altered layer that is light in color, low in organic matter, with fine textures and soil structure rather than rock structure. The tops of distinct prismatic structures may lie close to the surface.
If the soil has no Al horizon, the top of the cambic horizon lies at the
surface. Carbonates usually are present.
C. NATRIC
The natric horizon is characterized as having sodium in the subsurface layer sufficient to cause particle dispersion with about 15% of the
exchangeable cations replaced by sodium. It is a special kind of argillic
horizon and more commonly known as Solonetz or solodized-Solonetz. The
subsurface horizon has characteristic prismatic, columnar, or blocky
structures.
D. SALIC
The salic horizon is a subsurface layer which is 15 cm or more thick
with secondary enrichments of salts more soluble in cold water than gypsum. It has 2% or more soluble salt by weight, and the product of the
thickness in inches and percent salt by weight is 24% inches or more.
E. CALCIC
Calcic horizons in desert regions develop readily since the very limited
rainfall seems unable to remove lime even from the surface few centimeters. Where parent material is rich in carbonates or regular additions
of carbonate accumulates from dust, the calcic horizon may become cemented into a hard, massive layer called a petrocalcic horizon. The calcic
horizon is defined as having secondary carbonate enrichment that is more
than 15 cm thick, a CaC0 3 equivalent content of more than 15%, and
at least 5% more CaC0 3 equivalent than the C horizon.
F. GYPSIC
The gypsic horizon is similar to the calcic horizon but is a secondary
enrichment of the sulfate of calcium (gypsum) rather than the carbonate
of calcium (lime). It is a layer more than 15 cm thick that has at least
more than 5% more gypsum than the C or underlying stratum, and in
WALLACE H. FULLER
B. CAMBIC
The cambic horizon is an altered layer that is light in color, low in organic matter, with fine textures and soil structure rather than rock structure. The tops of distinct prismatic structures may lie close to the surface.
If the soil has no Al horizon, the top of the cambic horizon lies at the
surface. Carbonates usually are present.
C. NATRIC
The natric horizon is characterized as having sodium in the subsurface layer sufficient to cause particle dispersion with about 15% of the
exchangeable cations replaced by sodium. It is a special kind of argillic
horizon and more commonly known as Solonetz or solodized-Solonetz. The
subsurface horizon has characteristic prismatic, columnar, or blocky
structures.
D. SALIC
The salic horizon is a subsurface layer which is 15 cm or more thick
with secondary enrichments of salts more soluble in cold water than gypsum. It has 2% or more soluble salt by weight, and the product of the
thickness in inches and percent salt by weight is 24% inches or more.
E. CALCIC
Calcic horizons in desert regions develop readily since the very limited
rainfall seems unable to remove lime even from the surface few centimeters. Where parent material is rich in carbonates or regular additions
of carbonate accumulates from dust, the calcic horizon may become cemented into a hard, massive layer called a petrocalcic horizon. The calcic
horizon is defined as having secondary carbonate enrichment that is more
than 15 cm thick, a CaC0 3 equivalent content of more than 15%, and
at least 5% more CaC0 3 equivalent than the C horizon.
F. GYPSIC
The gypsic horizon is similar to the calcic horizon but is a secondary
enrichment of the sulfate of calcium (gypsum) rather than the carbonate
of calcium (lime). It is a layer more than 15 cm thick that has at least
more than 5% more gypsum than the C or underlying stratum, and in