LOCATION HAMBROOK MDEstablished Series
TAXONOMIC CLASS: Fine-loamy, siliceous, semiactive, mesic Typic Hapludults
TYPICAL PEDON: Hambrook loam, on a smooth 0 percent slope, in a cultivated field that has been heavily limed. (Colors are for a moist soil).
Ap--0 to 10 inches; dark grayish brown (10YR 4/2) loam; weak fine granular structure; friable; slightly sticky, slightly plastic; many very fine and fine roots; many very fine, common fine, and few medium tubular pores; neutral; abrupt smooth boundary. (7 to 11 inches thick)
BE--10 to 14 inches; yellowish brown (10YR 5/6) loam; weak medium subangular blocky structure; friable; slightly sticky, slightly plastic; common very fine and few fine roots; many very fine, common fine, and few medium tubular pores; neutral; clear wavy boundary. (0 to 5 inches thick)
Bt1--14 to 21 inches; yellowish brown (10YR 5/8) sandy clay loam; moderate medium subangular blocky structure; friable; moderately sticky, moderately plastic; common very fine and few fine roots; many very fine and fine, common medium, and few coarse tubular pores; many distinct clay films on faces of peds and lining soil pores; moderately acid; gradual wavy boundary.
Bt2--21 to 28 inches; yellowish brown (10YR 5/8) sandy loam; moderate medium subangular blocky structure; friable; slightly sticky, slightly plastic; common very fine and few fine roots; many very fine and fine, common medium, and few coarse tubular pores; many distinct clay films on faces of peds and lining soil pores; moderately acid; clear wavy boundary. (Combined thickness of the Bt horizons is 12 to 25 inches.)
BC--28 to 40 inches; strong brown (7.5YR 5/8) loamy sand; weak medium subangular blocky structure; very friable; few very fine roots; many very fine, and common fine irregular pores; common clay coatings on sand grains; common medium distinct light yellowish brown (10YR 6/4) iron depletions in the lower part of the horizon; slightly acid; clear smooth boundary. (8 to 14 inches thick)
C--40 to 60 inches; brownish yellow (10YR 6/6) sand; massive; very friable; few very fine roots; common medium distinct pale brown (10YR 6/3) iron depletions and few medium prominent strong brown (7.5YR 5/8) iron accumulations; slightly acid; abrupt smooth boundary.
Cg1--60 to 65 inches; light gray (5Y 7/2) sand; massive; very friable; few very fine roots; common medium prominent strong brown (7.5YR 5/8) iron accumulations; slightly acid; abrupt smooth boundary.
2Cg2--65 to 72 inches; light gray (5Y 7/2) silt loam; massive; friable, sticky, slightly plastic; slightly acid.
TYPE LOCATION: Dorchester County, Maryland; approximately 2.75 miles southwest of Secretary; 5,000 feet north of Route 16 on Cedar Grove Road, 100 feet east into field; lat. 38 degrees 34 minutes 41 seconds N. and long. 75 degrees 59 minutes 34 seconds W.
RANGE IN CHARACTERISTICS:
Solum Thickness: 20 to 40 inches
Depth to Bedrock: Greater than 60 inches
Depth to the Lithologic Discontinuity: 48 to 72 inches or more
Depth to Seasonal High Water Table: 48 to 72 inches, January to May
Rock Fragments: 0 to 10 percent, by volume in the solum and 0 to 20 percent in the substratum, mostly rounded quart gravel
Soil Reaction: Extremely acid to strongly acid, throughout the profile, unless limed
RANGE OF INDIVIDUAL HORIZONS:
Ap or A horizon:
Color--hue of 10YR, value of 3 to 5, chroma of 2 to 4
Texture--loamy sand, sandy loam or loam
E horizon (if it occurs):
Color--hue of 10YR or 2.5Y, value of 4 to 6, chroma of 4 to 6
Texture--loamy sand, sandy loam or loam
BE horizon:
Color--hue of 10YR or 2.5Y, value of 4 to 6, chroma of 4 to 6
Texture--loamy sand, sandy loam or loam
Bt horizon:
Color--hue of 7.5YR or 10YR, value of 4 to 6, chroma of 4 to 8
Texture--sandy clay loam, loam, or sandy loam
BC horizon:
Color--hue of 7.5YR or 10YR, value of 4 to 6, chroma of 4 to 8
Texture--loamy sand, sandy loam, or fine sandy loam
C horizon:
Color--hue of 10YR to 5Y, value of 4 to 7, chroma of 3 to 6
Texture (fine-earth fraction)--commonly stratified sand, loamy sand, or sandy loam
Redoximorphic Features--iron depletions in shades of olive or gray and iron accumulations in shades of red, brown, yellow, or olive
Cg horizon (if it occurs):
Color--hue of 10YR to 5Y, value of 4 to 7, chroma of 1 or 2 , or is neutral with value of 4 to 7
Texture (fine-earth fraction)--commonly stratified sand, loamy sand, or sandy loam
Redoximorphic Features--iron depletions in shades of olive or gray and iron accumulations in shades of red, brown, yellow, or olive
2Cg horizon:
Color--hue of 10YR to 5Y, value of 4 to 7, chroma of 1 or 2, or is neutral with value of 4 to 7
Texture (fine-earth fraction)--very fine sandy loam, fine sandy loam, loam, clay loam, or silt loam
Redoximorphic Features--iron depletions in shades of olive or gray and iron accumulations in shades of red, brown, yellow, or olive
COMPETING SERIES:
Alonzville soils--formed in alluvium derived from sandstone, siltstone, and shale
Bailegap soils--formed in residuum weathered from sandstone, siltstone, and shale and are deep to hard bedrock
Beersheba soil--formed in residuum weathered from sandstone and are moderately deep to paralithic contact
Gunstock soils--formed in residuum weathered from metasiltstone and phyllite and are moderately deep to a paralithic contact
Harmiller soils--formed in residuum weathered from metasedimentary rocks and are moderately deep to a paralithic contact
Jefferson soils--formed in colluvium derived from sandstone, siltstone, and shale
Keener soils--formed in colluvium derived from arkose, metagraywacke, and quartzite
Lily soils--formed in residuum weathered from sandstone and are moderately deep to a lithic contact
Lonewood soils--formed in a silty mantle underlain by residuum weathered from sandstone and shale and have a lithic contact between 40 and 72 inches
Marr soils-sand fraction in the particle-size control section is dominantly fine or very fine sand, on similar landforms
McCamy soils--formed in residuum weathered from metasedimentary rocks and have hard bedrock within 20 to 40 inches
Riney soils--formed in residuum weathered from sandstone and shale and are deep to soft bedrock
Sassfras soil---have a seasonal high greater than 72 inches, on slightly higher landforms
Shinbone soils--formed in residuum weathered from metasedimentary rocks and are deep to a paralithic contact
Sunnyside soils--have a Bt horizon with hue of 2.5YR or redder
GEOGRAPHIC SETTING:
Landscape: Coastal Plain
Landform: Slightly depressional uplands
Elevation: 5 to 40 feet
Parent Material: Stratified alluvial and marine sediments
Mean Annual Air Temperature: 52 to 58 degrees F.
Mean Annual Precipitation: 42 to 48 inches
Frost Free Period: 190 to 210 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Downer soils--on higher landforms
Hammonton soils--on lower-lying landforms
Matapeake soils--on lower-lying landforms
Mattapex soils--on lower-lying landforms
Sassafras soils--on higher landforms
Woodstown soils--on higher landforms
USE: Most areas are cleared and used for growing corn, barley, wheat and soybeans.
VEGETATION: Wooded areas have an overstory of white oak, black oak, and scarlet oak. Some areas have Virginia pine and loblolly pine mixed with the oaks. Common understory species are sassafras, dogwood, greenbriar, American holly and lowbush blueberry.
DISTRIBUTION: Coastal Plains of Maryland and Delaware
EXTENT: Small
SERIES ESTABLISHED: Dorchester County, Maryland, 1992
REMARKS: This soil was formerly included in the Sassafras series. Laboratory data indicates a base saturation (by sum of cations) greater than 35 percent on cropland areas, and a base saturation of less than 35 percent in woodland areas. Scientists believe the high base saturation in this soil has been caused by long-time cropping practices (liming), and the soil would revert to a lower base saturation if the cropland areas were converted back to woodland.
Diagnostic horizons and other diagnostic soil characteristics recognized in this pedon are:
Ochric epipedon--the zone from the surface of the soil to a depth of 10 inches (Ap horizon)
Argillic horizon--the zone from 14 to 28 inches (Bt horizon)
SERIES INTERPRETATION RECORD(S): MD0147
TABULAR SERIES DATA:
SOI-5 Soil Name Slope Airtemp FrFr/Seas Precip Elevation
MD0147 HAMBROOK 0- 10 52- 58 190-210 42- 48 5-40
SOI-5 FloodL FloodH Watertable Kind Months Bedrock Hardness MD0147 NONE 4.0-6.0 APPARENT JAN-MAY >60SOI-5 Depth Texture 3-Inch No-10 Clay% -CEC- MD0147 0-10 L SL 0- 0 85-100 12-18 5- 10 MD0147 10-14 L SL 0- 0 85-100 10-18 1- 5 MD0147 14-28 SCL SL L 0- 0 85-100 18-27 1- 5 MD0147 28-65 LS S 0- 0 70-100 3- 8 1- 5 MD0147 65-72 SR FSL SICL 0- 0 70-100 15-30 1- 5
SOI-5 Depth -pH- O.M. Salin Permeab Shnk-Swll MD0147 0-10 3.6- 5.5 .5-3. - 0.6- 6.0 LOW MD0147 10-14 3.6- 5.5 0.-.5 - 0.6- 6.0 LOW MD0147 14-28 3.6- 5.5 0.-.5 - 0.6- 2.0 LOW MD0147 28-65 3.6- 5.5 0.-.5 - 2.0- 20 LOW MD0147 65-72 3.6- 5.5 0.-.5 - 0.06- 0.6 LOW