JDG.Haploxeralfs

Key to Subgroups

JDGA. Haploxeralfs that have both:
1. A lithic contact within 50 cm of the mineral soil surface; and
2. A color value, moist, of 3 or less and 0.7 percent or more organic carbon either throughout an Ap horizon or throughout the upper 10 cm of an A horizon. Lithic Mollic Haploxeralfs
Soil Families and Soil Series in Subgroup

JDGB. Other Haploxeralfs that have both:
1. A lithic contact within 50 cm of the mineral soil surface; and
2. An argillic or kandic horizon that is discontinuous horizontally in each pedon. Lithic Ruptic-Inceptic Haploxeralfs
Soil Families and Soil Series in Subgroup

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

JDGD. Other Haploxeralfs 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 Haploxeralfs
Soil Families and Soil Series in Subgroup

JDGE. Other Haploxeralfs that have both:
1. In one or more horizons within 75 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); and
2. Throughout one or more horizons with a total thickness of 18 cm or more within 75 cm of the mineral soil surface, one or more of the following:
a. A fine-earth fraction with both a bulk density of 1.0 g/cm3 or less, measured at 33 kPa water retention, and Al plus 1/2 Fe percentages (by ammonium oxalate) totaling more than 1.0; or
b. 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
c. 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. Aquandic Haploxeralfs
Soil Families and Soil Series in Subgroup

JDGF. Other Haploxeralfs that have, throughout one or more horizons with a total thickness of 18 cm or more within 75 cm of the mineral soil surface, a fine-earth fraction with both a bulk density of 1.0 g/cm3 or less, measured at 33 kPa water retention, and Al plus 1/2 Fe percentages (by ammonium oxalate) totaling more than 1.0. Andic Haploxeralfs
Soil Families and Soil Series in Subgroup

JDGG. Other Haploxeralfs that have, throughout one or more horizons with a total thickness of 18 cm or more within 75 cm of the mineral 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 Haploxeralfs
Soil Families and Soil Series in Subgroup

JDGH. Other Haploxeralfs that have both:
1. Fragic soil properties:
a. In 30 percent or more of the volume of a layer 15 cm or more thick that has its upper boundary within 100 cm of the mineral soil surface; or
b. In 60 percent or more of the volume of a layer 15 cm or more thick; and
2. Redox depletions with chroma of 2 or less in layers that also have aquic conditions in normal years (or artificial drainage) either:
a. Within the upper 25 cm of the argillic or kandic horizon if its upper boundary is within 50 cm of the mineral soil surface; or
b. Within 75 cm of the mineral soil surface if the upper boundary of the argillic or kandic horizon is 50 cm or more below the mineral soil surface. Fragiaquic Haploxeralfs
Soil Families and Soil Series in Subgroup

JDGI. Other Haploxeralfs that have both:
1. In one or more horizons within 75 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); and
2. An argillic or kandic horizon that has a base saturation (by sum of cations) of less than 75 percent in one or more subhorizons within its upper 75 cm or above a densic, lithic, or paralithic contact, whichever is shallower. Aquultic Haploxeralfs
Soil Families and Soil Series in Subgroup

JDGJ. Other Haploxeralfs that have, in one or more horizons within 75 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 Haploxeralfs
Soil Families and Soil Series in Subgroup

JDGK. Other Haploxeralfs that have an exchangeable sodium percentage of 15 or more (or a sodium adsorption ratio of 13 or more) in one or more subhorizons of the argillic or kandic horizon. Natric Haploxeralfs
Soil Families and Soil Series in Subgroup

JDGL. Other Haploxeralfs that have fragic soil properties:
1. In 30 percent or more of the volume of a layer 15 cm or more thick that has its upper boundary within 100 cm of the mineral soil surface; or
2. In 60 percent or more of the volume of a layer 15 cm or more thick. Fragic Haploxeralfs
Soil Families and Soil Series in Subgroup

JDGM. Other Haploxeralfs that have an argillic horizon that:
1. Consists entirely of lamellae; or
2. Is a combination of two or more lamellae and one or more subhorizons with a thickness of 7.5 to 20 cm, each layer with an overlying eluvial horizon; or
3. Consists of one or more subhorizons that are more than 20 cm thick, each with an overlying eluvial horizon, and above these horizons there are either:
a. Two or more lamellae with a combined thickness of 5 cm or more (that may or may not be part of the argillic horizon); or
b. A combination of lamellae (that may or may not be part of the argillic horizon) and one or more parts of the argillic horizon 7.5 to 20 cm thick, each with an overlying eluvial horizon. Lamellic Haploxeralfs
Soil Families and Soil Series in Subgroup

JDGN. Other Haploxeralfs that have a sandy particle-size class throughout the upper 75 cm of the argillic horizon or throughout the entire argillic horizon if it is less than 75 cm thick. Psammentic Haploxeralfs
Soil Families and Soil Series in Subgroup

JDGO. Other Haploxeralfs that have 5 percent or more (by volume) plinthite in one or more horizons within 150 cm of the mineral soil surface. Plinthic Haploxeralfs
Soil Families and Soil Series in Subgroup

JDGP. Other Haploxeralfs that have a calcic horizon that has its upper boundary within 100 cm of the mineral soil surface. Calcic Haploxeralfs
Soil Families and Soil Series in Subgroup

JDGQ. Other Haploxeralfs that have:
1. An argillic, kandic, or natric horizon that is 35 cm or less thick; and
2. No densic, lithic, or paralithic contact within 100 cm of the mineral soil surface. Inceptic Haploxeralfs
Soil Families and Soil Series in Subgroup

JDGR. Other Haploxeralfs that have an argillic or kandic horizon that has a base saturation (by sum of cations) of less than 75 percent in one or more subhorizons within its upper 75 cm or above a densic, lithic, or paralithic contact, whichever is shallower. Ultic Haploxeralfs
Soil Families and Soil Series in Subgroup

JDGS. Other Haploxeralfs that have a color value, moist, of 3 or less and 0.7 percent or more organic carbon either throughout the upper 10 cm of the mineral soil (unmixed) or throughout the upper 18 cm of the mineral soil after mixing. Mollic Haploxeralfs
Soil Families and Soil Series in Subgroup

JDGT. Other Haploxeralfs. Typic Haploxeralfs
Soil Families and Soil Series in Subgroup

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