IDE.Calcicryolls

Key to Great Groups 

IDE. Other Cryolls that:

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

2. In all parts above the calcic or petrocalcic horizon, after the materials between the soil surface and a depth of 18 cm have been mixed, either are calcareous or have a texture of loamy fine sand or coarser. Calcicryolls, p. 578 

IDE. These are the Cryolls that have a calcic or petrocalcic horizon that has its upper boundary within 100 cm of the mineral soil surface. They are calcareous, or would be calcareous if plowed, in all parts of the pedon above the calcic horizon, or they have a texture of loamy fine sand or coarser in all parts above the calcic or petrocalcic horizon. The mollic epipedon commonly includes part of the calcic horizon. These soils formed in materials that have a moderate to high percentage of carbonates. Many of the soils are in areas of deposits that originated from limestone. Calcicryolls occur in areas of cool or short summers. In the United States, the vegetation at the time of settlement was either grass or forest. The soils are of moderate extent in the mountains of the Western United States. Most of the soils are used as rangeland, forest, or wildlife habitat. A few areas are cultivated and used for small grain or hay. 

Definition 

Calcicryolls are the Cryolls that:

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

2. Either are calcareous or have a texture of loamy fine sand or coarser in all parts above the calcic or petrocalcic horizon after the materials between the soil surface and a depth of 18 cm have been mixed;

3. Do not have a duripan that has its upper boundary within 100 cm of the mineral soil surface; and

4. Do not have a natric or argillic horizon. 

Key to Subgroups 

IDEA. Calcicryolls that have a lithic contact within 50 cm of the mineral soil surface. Lithic Calcicryolls 

IDEB. Other Calcicryolls that have a petrocalcic horizon that has its upper boundary within 100 cm of the mineral soil surface. Petrocalcic Calcicryolls 

IDEC. Other Calcicryolls that have a mollic epipedon that is 40 cm or more thick and has a texture finer than loamy fine sand. Pachic Calcicryolls 

IDED. Other Calcicryolls that have an ustic moisture regime. Ustic Calcicryolls 

IDEE. Other Calcicryolls that have a xeric moisture regime. Xeric Calcicryolls 

IDEF. Other Calcicryolls. Typic Calcicryolls 

Definition of Typic Calcicryolls 

Typic Calcicryolls are the Calcicryolls that:

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

2. Have a mollic epipedon that is less than 40 cm thick or has a texture of loamy fine sand or coarser;

3. Have a udic moisture regime; and

4. Do not have a petrocalcic horizon with its upper boundary within 100 cm of the mineral soil surface.


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