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LEE.Ustorthents

Key to Subgroups

LEEA. Ustorthents that have:
1. A lithic contact within 50 cm of the mineral soil surface; and
2. When neither irrigated nor fallowed to store moisture, one of the following:
a. A frigid temperature regime and a moisture control section that, in normal years, is dry in all parts for four-tenths or more of the cumulative days per year when the soil temperature at a depth of 50 cm below the soil surface is higher than 5 oC; or
b. A mesic or thermic soil temperature regime and a moisture control section that, in normal years, is dry in some part for six-tenths or more of the cumulative days per year when the soil temperature at a depth of 50 cm below the soil surface is higher than 5 oC; or
c. A hyperthermic, isomesic, or warmer iso soil temperature regime and a moisture control section that, in normal years, remains moist in some or all parts for less than 90 consecutive days per year when the temperature at a depth of 50 cm below the soil surface is higher than 8 oC. Aridic Lithic Ustorthents
Soil Families and Soil Series in Subgroup

LEEB. Other Ustorthents that have a lithic contact within 50 cm of the mineral soil surface. Lithic Ustorthents
Soil Families and Soil Series in Subgroup

LEEC. Other Ustorthents that have both:
1. One or both of the following:
a. Cracks within 125 cm of the mineral soil surface that are 5 mm or more wide through a thickness of 30 cm or more for some time in normal years and slickensides or wedge-shaped aggregates in a layer 15 cm or more thick that has its upper boundary within 125 cm of the mineral soil surface; or
b. A linear extensibility of 6.0 cm or more between the mineral soil surface and either a depth of 100 cm or a densic, lithic, or paralithic contact, whichever is shallower; and
2. When neither irrigated nor fallowed to store moisture, one of the following:
a. A frigid temperature regime and a moisture control section that, in normal years, is dry in all parts for four tenths or more of the cumulative days per year when the soil temperature at a depth of 50 cm below the soil surface is higher than 5 oC; or
b. A mesic or thermic soil temperature regime and a moisture control section that, in normal years, is dry in some part for six-tenths or more of the cumulative days per year when the soil temperature at a depth of 50 cm below the soil surface is higher than 5 oC; or
c. A hyperthermic, isomesic, or warmer iso soil temperature regime and a moisture control section that, in normal years, remains moist in some or all parts for less than 90 consecutive days per year when the temperature at a depth of 50 cm below the soil surface is higher than 8 oC. Torrertic Ustorthents
Soil Families and Soil Series in Subgroup

LEED. Other Ustorthents that have one or both of the following:
1. Cracks within 125 cm of the mineral soil surface that are 5 mm or more wide through a thickness of 30 cm or more for some time in normal years and slickensides or wedgeshaped aggregates in a layer 15 cm or more thick that has its upper boundary within 125 cm of the mineral soil surface; or
2. A linear extensibility of 6.0 cm or more between the mineral soil surface and either a depth of 100 cm or a densic, lithic, or paralithic contact, whichever is shallower. Vertic Ustorthents
Soil Families and Soil Series in Subgroup

LEEE. Other Ustorthents that have anthraquic conditions. Anthraquic Ustorthents
Soil Families and Soil Series in Subgroup

LEEF. Other Ustorthents that have, in one or more horizons within 100 cm of the mineral soil surface, redox depletions with chroma of 2 or less and also aquic conditions for some time in normal years (or artificial drainage). Aquic Ustorthents
Soil Families and Soil Series in Subgroup

LEEG. Other Ustorthents that are saturated with water in one or more layers within 150 cm of the mineral soil surface in normal years for either or both:
1. 20 or more consecutive days; or
2. 30 or more cumulative days. Oxyaquic Ustorthents
Soil Families and Soil Series in Subgroup

LEEH. Other Ustorthents that have a horizon within 100 cm of the mineral soil surface that is 15 cm or more thick and that either has 20 percent or more (by volume) durinodes or is brittle and has a firm rupture-resistance class when moist. Durinodic Ustorthents
Soil Families and Soil Series in Subgroup

LEEI. Other Ustorthents that have both:
1. When neither irrigated nor fallowed to store moisture, one of the following:
a. A frigid temperature regime and a moisture control section that, in normal years, is dry in all parts for fourtenths or more of the cumulative days per year when the soil temperature at a depth of 50 cm below the soil surface is higher than 5 oC; or
b. A mesic or thermic soil temperature regime and a moisture control section that, in normal years, is dry in some part for six-tenths or more of the cumulative days per year when the soil temperature at a depth of 50 cm below the soil surface is higher than 5 oC; or
c. A hyperthermic, isomesic, or warmer iso soil temperature regime and a moisture control section that, in normal years, remains moist in some or all parts for less than 90 consecutive days per year when the temperature at a depth of 50 cm below the soil surface is higher than 8 oC; 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; and
(1) In the 0.02 to 2.0 mm fraction, 5 percent or more volcanic glass; and
(2) [(Al plus 1/2 Fe, percent extracted by ammonium oxalate) times 60] plus the volcanic glass (percent) is equal to 30 or more. Vitritorrandic Ustorthents
Soil Families and Soil Series in Subgroup

LEEJ. Other Ustorthents 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; and
a. In the 0.02 to 2.0 mm fraction, 5 percent or more volcanic glass; and
b. [(Al plus 1/2 Fe, percent extracted by ammonium oxalate) times 60] plus the volcanic glass (percent) is equal to 30 or more. Vitrandic Ustorthents
Soil Families and Soil Series in Subgroup

LEEK. Other Ustorthents that, when neither irrigated nor fallowed to store moisture, have one of the following:
1. A frigid soil temperature regime and a moisture control section that, in normal years, is dry in all parts for fourtenths or more of the cumulative days per year when the soil temperature at a depth of 50 cm below the soil surface is higher than 5 oC; or
2. A mesic or thermic soil temperature regime and a moisture control section that, in normal years, is dry in some part for six-tenths or more of the cumulative days per year when the soil temperature at a depth of 50 cm below the soil surface is higher than 5 oC; or
3. A hyperthermic, isomesic, or warmer iso soil temperature regime and a moisture control section that, in normal years, is moist in some or all parts for less than 180 cumulative days per year when the temperature at a depth of 50 cm below the soil surface is higher than 8 oC. Aridic Ustorthents
Soil Families and Soil Series in Subgroup

LEEL. Other Ustorthents that, when neither irrigated nor fallowed to store moisture, have one of the following:
1. A frigid soil temperature regime and a moisture control section that, in normal years, is dry in some or all parts for less than 105 cumulative days per year when the soil temperature at a depth of 50 cm below the soil surface is higher than 5 oC; or
2. A mesic or thermic soil temperature regime and a moisture control section that, in normal years, is dry in some part for less than four-tenths of the cumulative days per year when the temperature at a depth of 50 cm below the soil surface is higher than 5 oC; or
3. A hyperthermic, isomesic, or warmer iso soil temperature regime and a moisture control section that, in normal years, is dry in some or all parts for less than 120 cumulative days per year when the temperature at a depth of 50 cm below the soil surface is higher than 8 oC. Udic Ustorthents
Soil Families and Soil Series in Subgroup

LEEM. Other Ustorthents that have 50 percent or more (by volume) wormholes, wormcasts, and filled animal burrows between either the Ap horizon or a depth of 25 cm from the mineral soil surface, whichever is deeper, and either a depth of 100 cm or a densic, lithic, paralithic, or petroferric contact, whichever is shallower. Vermic Ustorthents
Soil Families and Soil Series in Subgroup

LEEN. Other Ustorthents. Typic Ustorthents
Soil Families and Soil Series in Subgroup

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