LOCATION POQUONOCK RI +CT MAEstablished Series
TAXONOMIC CLASS: Mixed, mesic Typic Udipsamments
TYPICAL PEDON: Poquonock loamy fine sand - idle field, in an area of Poquonock loamy fine sand, 3 to 8 percent slopes, at an elevation of about 5 feet. (Colors are for moist soil.)
Ap--0 to 8 inches, dark brown (10YR 3/3) loamy fine sand; weak medium granular structure; very friable; many fine roots; 2 percent gravel; strongly acid; abrupt wavy boundary. (6 to 10 inches thick)
Bw1--8 to 18 inches, dark yellowish brown (10YR 4/4) loamy fine sand; weak medium granular structure; very friable; few fine roots; 1 percent gravel; strongly acid; clear wavy boundary. (6 to 14 inches thick)
Bw2--18 to 28 inches, light olive brown (2.5Y 5/4) loamy sand; single grain; loose; few fine roots; 5 percent gravel; strongly acid; clear wavy boundary. (10 to 16 inches thick)
2Cd--28 to 60 inches, dark gray (N 4/ ) gravelly loam; weak thick plates; very firm, brittle; 25 percent gravel; strongly acid.
TYPE LOCATION: Newport County, Rhode Island; northwest corner of the town of Middletown, 1.2 miles south of the Middletown-Portsmouth town line and 500 feet east of Narragansett Bay, USGS Prudence Island quadrangle, latitude 41 degrees 32 minutes, 46 seconds N., longitude 71 degrees, 18 minutes, 33 seconds W.; NAD 27.
RANGE IN CHARACTERISTICS: Thickness of the solum and depth to the densic contact ranges from 20 to 38 inches. Depth to bedrock is commonly more than 6 feet. Rock fragments range from 0 to 25 percent in the surface layer, 0 to 15 percent in the subsoil, and from 10 to 35 percent in the substratum. Fragments larger than 10 inches range from 0 to 20 percent in the surface layer and from 0 to 5 percent in the subsoil and substratum. Three to 10 inch fragments range from 0 to 10 percent in the surface layer, 0 to 5 percent in the subsoil, and 0 to 15 percent in the substratum. Fragments less than 3 inches range from 0 to 10 percent in the solum and from 5 to 30 percent in the substratum. Unless limed, the soil is very strongly acid to moderately acid.
The Ap horizon has hue 10YR or 7.5YR, value 3 or 4, and chroma 2 through 4. Undisturbed pedons have a thin A horizon that has hue 10YR, value 2 or 3, and chroma 1 or 2. The Ap or A horizon is fine sandy loam, sandy loam, loamy fine sand, or loamy sand in the fine earth. It has weak fine or medium granular structure and is friable or very friable.
Some pedons have a thin E horizon below the A horizon. It has hue 10YR or 2.5Y, value 4 through 6, and chroma 1 through 3. Texture, structure, and consistence are like the A horizon.
The B horizon has hue 7.5YR through 2.5Y, value 4 through 6, and chroma 4 through 8. Some pedons have a thin lower B horizon that has 5YR hue. The B horizon is loamy fine sand, loamy sand, fine sand or sand in the fine earth. It has weak, fine or medium granular structure or it is massive or single grain. Consistence is very friable or loose.
The 2Cd layer is neutral or has hue 2.5YR through 5Y, value 2 through 5, and chroma 1 through 4. It is fine sandy loam, loam or silt loam in the fine earth. The structure is geogenically derived, appearing in the form of weak or moderate, thin to thick plates or it is massive. Consistence is firm or very firm.
COMPETING SERIES: Theses are the Acquango, Aldo, Als, Bigapple, Biltmore, Bisbee, Boplain, Breeze, Caesar, Chimney, Chute, Coneward, Dabney, Dart, Duda, Ecklund, Ewall, Hawsley, Hodge, Isolde, Kawich, Mckelvie, Oakville , Osolo, Pahuk, Panamaker, Peji, Penwood, Perks, Pinegrove, Plainfield, Preston, Razito, Sardak, Sarpy, Scotah, Sheppard, Simeon, Spessard, Stumble, Suncook, Sundown, Tipper, Tipperary, Tivin, Tonalea, Tricera, Tyner, Valentine, Windsor, Yenrab.
Acquango, Aldo, Als, Biltmore, Bisbee, Boplain, Chimney, Chute, Coneward, Dabney, Dart, Duda, Ecklund, Ewall, Hawsley, Hodge, Isolde, Kawich, Mckelvie, Oakville , Osolo, Pahuk, Panamaker, Peji, Perks, Pinegrove, Preston, Razito, Sardak, Sarpy, Scotah, Sheppard, Simeon, Spessard, Stumble, Sundown, Tipper, Tipperary, Tivin, Tonalea, Tricera, Tyner, Valentine, Windsor, Yenrab are from outside Land Resource Region R.
These soils lack a densic contact.
GEOGRAPHIC SETTING: Poquonock soils are nearly level to moderately steep soils on till plains that typically border outwash terraces. Slope ranges from 0 to 25 percent but are mainly less than 8 percent. The soils formed in sandy sediments over loamy till with a densic contact. The till is derived from a wide variety of rocks, including sandstone, shale, phyllite, schist, gneiss, and granite. Mean annual temperature is 45 degrees to 52 degrees F. and mean annual precipitation is 40 to 50 inches. The growing season is 120 to 185 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Agawam, Bernardston, Birchwood, Broadbrook, Deerfield, Essex, Hartford, Hinckley, Ludlow, Manchester, Merrimac, Newport, Ninigret, Paxton, Penwood, Pittstown, Quonset, Rainbow, Wethersfield, Windsor, and the Woodbridge soils on nearby landscapes.
Agawam,
Deerfield, and
Ninigret soils are on nearby terraces.
Bernardston,
Broadbrook,
Ludlow,
Newport,
Paxton,
Pittstown,
Rainbow,
Wethersfield, and
Woodbridge soils are on uplands but are loamy throughout.
Birchwood, Deerfield, and
Eldridge soils have low chroma depletions in the solum. Birchwood soils (moderately well drained) are associated in a drainage sequence.
Carver,
Hartford,
Merrimac,
Penwood, and
Windsor soils have a sandy particle-size control section and lack a dense substratum.
Essex soils have a sandy substratum.
Gloucester,
Hinckley,
Manchester, and
Quonset soils are sandy-skeletal and lack a dense substratum.
DRAINAGE AND PERMEABILITY: Well drained. Surface runoff is negligible to high. Saturated hydraulic conductivity ranges from high or very high in the solum and low or moderately low in the substratum.
USE AND VEGETATION: Most areas are cleared and used for cultivated crops, tobacco, vegetables, nursery stock, hay or pasture. Some areas are used for community development. A few areas are idle or wooded. Common trees are red, white, and black oak, hickory, gray birch, aspen, white ash, and white pine.
DISTRIBUTION AND EXTENT: Central lowland of Connecticut, Massachusetts, and eastern Rhode Island, MLRA 144A. The series is of moderate extent.
MLRA OFFICE RESPONSIBLE: Amherst, Massachusetts
SERIES ESTABLISHED: Hartford County, Connecticut, 1959.
REMARKS: Poquonock soils were previously classified as Sandy over loamy, Typic Udorthents and before that as Typic Fragiochrepts. Classification revised to meet current standards (6/2004). Soil fits Psamments criteria. There also is no loamy texture within the control section. Assignment of cation exchange activity class based on a review of limited lab data.
Diagnostic horizons and features included in this soil include:
1. Ochric epipedon the zone from 0 to 8 inches (Ap horizon)
2. Densic contact occurs at 28 inches
3. Psamments the zone from 10 to 28 inches has texture of loamy fine sand or coarser in all layers (Bw1 and Bw2 horizons)
4. Sandy particle size the zone from 10 to 28 inches averages loamy sand (Bw1 and Bw2 horizons)
ADDITIONAL DATA: Partial reference samples from pedons, 9500004 and 9500005 from Plymouth County, Massachusetts, samples by NSSL, Lincoln, NE, 1994.