LOCATION ALLARD                  NY

Established Series


The Allard series consists of very deep, well drained soils formed in silty alluvium or lacustrine deposits that overlie stratified sand and gravel. They are on outwash terraces and stream terraces. Slope ranges from 0 to 15 percent. Mean annual temperature is 48 degrees F., and mean annual precipitation is 38 inches.

TAXONOMIC CLASS: Coarse-silty over sandy or sandy-skeletal, mixed, active, mesic Typic Dystrudepts

TYPICAL PEDON: Allard silt loam, on a 3 percent slope in a cultivated field. (Colors are for moist soil unless otherwise noted.)

Ap--0 to 8 inches; dark grayish brown (10YR 4/2) silt loam; weak medium and fine granular structure; very friable; many fine roots; moderately acid; abrupt smooth boundary. (4 to 12 inches thick)

Bw1--8 to 14 inches; yellowish brown (10YR 5/4) silt loam; weak medium and fine granular structure; very friable; many fine roots; strongly acid; clear wavy boundary.

Bw2--14 to 20 inches; brown (10YR 5/3) silt loam; weak medium subangular blocky structure; friable; common fine roots; many fine pores; strongly acid; clear wavy boundary.

Bw3--20 to 24 inches; dark yellowish brown (10YR 4/4) silt loam; weak medium subangular blocky structure; firm; few roots; few pores; 2 percent gravel; strongly acid; clear wavy boundary. (Combined thickness of the Bw horizon is 10 to 34 inches.)

2C1--24 to 40 inches; mixed brown (10YR 4/3) and grayish brown (10YR 5/2) very gravelly loamy sand; single grain; slight cementation in some parts; loose; 50 percent gravel; moderately acid.

2C2--40 to 72 inches; grayish brown (10YR 5/2) extremely gravelly sand; single grain; loose; 60 percent gravel; moderately acid.

TYPE LOCATION: Wyoming County, New York; town of Pike, 2 miles south of the Village of Pike, 300 feet south of Wolfe Road, near edge of gravel pit along west side of N.Y. Route 19. USGS Pike, NY topographic quadrangle. Latitude 42 degrees, 31 minutes, 37 seconds N. and Longitude 78 degrees, 8 minutes, 54 seconds W. NAD 1927.

RANGE IN CHARACTERISTICS: Solum thickness ranges from 20 to 36 inches. Depth to bedrock is more than 60 inches. Rock fragments range from 0 to 5 percent in the solum, with gravelly subhorizons in some pedons, and from 0 to 70 percent in the 2C horizon. Rock fragments are dominated by sedimentary source material with some erratics of igneous or metamorphic origin.

The Ap on a horizon has hue of 7.5YR through 2.5Y, value of 3 through 5, and chroma of 2 through 4. It is silt loam, loam, very fine sandy loam, or fine sandy loam. The Ap horizon has granular or subangular blocky structure and very friable or friable consistence. Reaction ranges from very strongly acid to moderately acid, unless limed.

The Bw horizon has hue of 7.5YR through 5Y, value of 4 through 6, and chroma of 3 through 8. It is silt loam or very fine sandy loam. Bw horizons have weak or moderate, granular or subangular blocky structure except some subhorizons can be massive. Consistence is very friable to firm, some pedons may have a BC horizon. Reaction ranges from very strongly acid to moderately acid.

The 2C horizon has hue of 5YR through 5Y, value of 3 through 5, and chroma of 2 through 4. It ranges from sand to extremely gravelly loamy sand. The material is commonly single grain and loose with some pedons having discontinuous subhorizons that are weakly cemented. Reaction ranges from strongly acid to neutral.

COMPETING SERIES: Currently, there are no other series in the same family. The Enfield series were in the same family, but have not been updated to the 8th Edition of the Keys to Soil Taxonomy. Enfield soils have rock fragments dominated by acid igneous and metamorphic rocks.

The Abenaki, Alton, Barbour, Chenango, Hadley, Hamlin, Hartland, Haven, Merrimac, Pompton, Pope, Riverhead, Scio, Tioga, and Unadilla series are members of similar families. Alton and Chenango soils contain more rock fragments in the solum. Barbour, Hadley, Hamlin, Pope, and Tioga soils have irregular decrease in organic carbon with increasing depth. Haven soils have more sand in the solum. Abenaki and Cloquet soils are in colder regions. Merrimac, Pompton, and Riverhead soils have more sand in the solum and lack contrasting C horizons. Hartland, Scio, and Unadilla soils are in deep silty deposits to a depth of at least 40 inches.

GEOGRAPHIC SETTING: Allard soils are on old alluvial terraces and outwash terraces above the flood plains of streams in glaciated areas. Allard soils usually do not flood, except in some areas they flood very rarely during violent storms. Slope gradient ranges from 0 to 15 percent. These soils formed in old alluvium, Aeolian or lacustrine deposits that form a thin mantle over sand and gravel from glacial outwash or deltaic deposits. Mean annual precipitation ranges from 30 to 45 inches, mean annual temperature ranges from 47 to 52 degrees F., and mean growing season ranges from 130 to 180 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Bath, Chenango, Mardin, Tioga, Unadilla, and Valois soils. Bath, Mardin, and Valois are on nearby till covered uplands. Chenango soils are on nearby terrace that lack the silty mantle. Unadilla soils are on terraces that have deep silty deposits. Tioga soils are on nearby flood plains.

DRAINAGE AND PERMEABILITY: Well drained. The potential for surface runoff is low. Permeability is moderate in the surface layer and subsoil, and rapid or very rapid in the substratum.

USE AND VEGETATION: Most areas have been cleared and are used for growing corn, hay, small grains, small fruits, nursery stock, and vegetables. Native vegetation is sugar maple, beech, white ash, black cherry, red oak, white pine, and hemlock.

DISTRIBUTION AND EXTENT: New York, Pennsylvania, and possibly New Jersey. MLRA's 101, 139, 140, and 144A. The soil is moderately extensive.


SERIES ESTABLISHED: Orange County, New York, 1954.

REMARKS: This soil now classifies in the subgroup of Typic Dystrudepts with 8th edition of Soil Taxonomy. Competing series are expected to change as similar soils are reclassified. MLRA 120 was removed from the SC file. This is thought to be in error.

Diagnostic horizons and other features recognized in the typifying pedon:
a. Ochric epipedon - the zone from 0 to 8 inches (Ap horizon).
b. Cambic horizon - the zone from 8 to 24 inches (Bw horizon).
c. Estimated CEC activity class as active.

National Cooperative Soil Survey