GAE.Calcicryids

Key to Great Groups 

GAE. Other Cryids that have a calcic horizon that has its upper boundary within 100 cm of the soil surface. Calcicryids, p. 367 

GAE. These are the Cryids that are derived from parent materials high in content of lime or that have had lime added as dust. Precipitation is unable to remove the calcium carbonate to substantial depths. These soils typically have an ochric epipedon and a calcic horizon. Some have a cambic horizon overlying the calcic horizon. 

Definition 

Calcicryids are the Cryids that:

1. Have a calcic horizon that has its upper boundary within 100 cm of the soil surface;

2. Do not have a duripan or a gypsic, petrocalcic, petrogypsic, or salic horizon with an upper boundary within 100 cm of the soil surface;

3. Do not have an argillic or natric horizon. 

Key to Subgroups 

GAEA. Calcicryids that have a lithic contact within 50 cm of the soil surface. Lithic Calcicryids 

GAEB. Other Calcicryids that have both:

1. A moisture control section that is dry in all parts for less than three-fourths of the time (cumulative) when the soil temperature is 5 oC or higher at a depth of 50 cm and a soil moisture regime that borders on xeric; and

2. Throughout one or more horizons with a total thickness of 18 cm or more within 75 cm of the soil surface, one or both of the following:

                a. More than 35 percent (by volume) fragments coarser than 2.0 mm, of which more than 66 percent is cinders, pumice, and pumicelike fragments; or

                b. A fine-earth fraction containing 30 percent or more particles 0.02 to 2.0 mm in diameter, of which 5 percent or more is volcanic glass, and [(Al plus 1/2 Fe, percent extracted by ammonium oxalate) times 60] plus the volcanic glass (percent) is 30 or more.Vitrixerandic Calcicryids 

GAEC. Other Calcicryids that have, throughout one or more horizons with a total thickness of 18 cm or more within 75 cm of the soil surface, one or both of the following:

1. More than 35 percent (by volume) fragments coarser than 2.0 mm, of which more than 66 percent is cinders, pumice, and pumicelike fragments; or

2. A fine-earth fraction containing 30 percent or more particles 0.02 to 2.0 mm in diameter, of which 5 percent or more is volcanic glass, and [(Al plus 1/2 Fe, percent extracted by ammonium oxalate) times 60] plus the volcanic glass (percent) is 30 or more.Vitrandic Calcicryids 

GAED. Other Calcicryids that are dry in all parts of the moisture control section for less than three-fourths of the time (cumulative) when the soil temperature is 5 oC or higher at a depth of 50 cm and have a soil moisture regime that borders on xeric. Xeric Calcicryids 

GAEE. Other Calcicryids that are dry in all parts of the moisture control section for less than three-fourths of the time (cumulative) when the soil temperature is 5 oC or higher at a depth of 50 cm and have a soil moisture regime that borders on ustic. Ustic Calcicryids 

GAEF. Other Calcicryids. Typic Calcicryids 

Definition of Typic Calcicryids 

Typic Calcicryids are the Calcicryids that:

1. Do not have a lithic contact within 50 cm of the soil surface;

2. Are dry in all parts of the moisture control section for three-fourths or more of the time (cumulative) when the soil temperature is 5 oC or higher at a depth of 50 cm;

3. Do not have, throughout one or more horizons with a total thickness of 18 cm or more within 75 cm of the soil surface, either of the following:

                a. More than 35 percent (by volume) fragments coarser than 2.0 mm, of which more than 66 percent is cinders, pumice, and pumicelike fragments; or

                b. A fine-earth fraction containing 30 percent or more particles 0.02 to 2.0 mm in diameter, of which 5 percent or more is volcanic glass, and [(Al plus 1/2 Fe, percent extracted by ammonium oxalate) times 60] plus the volcanic glass (percent) is 30 or more. 

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