Al Madam soil series
The Al Madam series is a very deep soil formed in loamy and gravelly alluvial deposits containing gypsum as well as secondary calcium carbonate. It has a thin eolian mantle. (NE023) UAE.
Taxonomic classification: Typic Calcigypsids, coarse-loamy, carbonatic, hyperthermic
Diagnostic subsurface horizons described in this profile are: Calcic horizon, 34 to 95 cm; Gypsic horizon, 95 to 120 cm.
The pH (1:1) ranges from 7.0 to 8.5 throughout the profile. The EC (1:1) ranges from 0.1 to 2.0 in the A horizon. EC (1:1) ranges mostly from 0.5 to 5.0 in the B horizon, but it is as high as 8.5 in a few places. Gravel content is 0 to 15% in the A horizon. Many pedons have a mantle of eolian sand up to 40 cm thick, but this is not present on some pedons. Gravel content is mostly 5 to 35% in the B horizon, but in some pedons it is as high as 65% in one or more layers below 75 cm. The weighted average gravel content in the particle-size control section is less than 35%.
The A horizon ranges from about 10 to 40 cm thick. A thickness of more than 20 cm is generally associated with an eolian mantel. The A horizon has hue of 7.5YR or 10YR, value 5 to 7, and chroma 3 to 6. It is very fine sand or loamy fine sand where an eolian mantel is present, and fine sandy loam, sandy loam, or loam where there is no mantle.
The B horizon has hue of 7.5YR or 10YR, value 5 to 7, and chroma 2 to 4. It is mostly sandy loam, fine sandy loam, or loam, but includes layers of fine sand, loamy sand or loamy coarse sand. Also included are gravelly texture modifiers above 75 cm, and gravelly, very gravelly, or extremely gravelly texture modifiers in one or more layers below depths of 75 cm. Combined volume of visible secondary calcium carbonate and gypsum range from 2 to 25% in the B horizon. In some pedons, the B horizon is extremely weakly cemented to moderately cemented with gypsum and carbonates.
Some pedons near Rock outcrop areas have a 2R horizon below 150 cm.
Al Madam soil series
The Al Madam series is a very deep soil formed in loamy and gravelly alluvial deposits containing gypsum as well as secondary calcium carbonate. It has a thin eolian mantle. (NE023) UAE.
Taxonomic classification: Typic Calcigypsids, coarse-loamy, carbonatic, hyperthermic
Diagnostic subsurface horizons described in this profile are: Calcic horizon, 34 to 95 cm; Gypsic horizon, 95 to 120 cm.
The pH (1:1) ranges from 7.0 to 8.5 throughout the profile. The EC (1:1) ranges from 0.1 to 2.0 in the A horizon. EC (1:1) ranges mostly from 0.5 to 5.0 in the B horizon, but it is as high as 8.5 in a few places. Gravel content is 0 to 15% in the A horizon. Many pedons have a mantle of eolian sand up to 40 cm thick, but this is not present on some pedons. Gravel content is mostly 5 to 35% in the B horizon, but in some pedons it is as high as 65% in one or more layers below 75 cm. The weighted average gravel content in the particle-size control section is less than 35%.
The A horizon ranges from about 10 to 40 cm thick. A thickness of more than 20 cm is generally associated with an eolian mantel. The A horizon has hue of 7.5YR or 10YR, value 5 to 7, and chroma 3 to 6. It is very fine sand or loamy fine sand where an eolian mantel is present, and fine sandy loam, sandy loam, or loam where there is no mantle.
The B horizon has hue of 7.5YR or 10YR, value 5 to 7, and chroma 2 to 4. It is mostly sandy loam, fine sandy loam, or loam, but includes layers of fine sand, loamy sand or loamy coarse sand. Also included are gravelly texture modifiers above 75 cm, and gravelly, very gravelly, or extremely gravelly texture modifiers in one or more layers below depths of 75 cm. Combined volume of visible secondary calcium carbonate and gypsum range from 2 to 25% in the B horizon. In some pedons, the B horizon is extremely weakly cemented to moderately cemented with gypsum and carbonates.
Some pedons near Rock outcrop areas have a 2R horizon below 150 cm.