LOCATION HAMRE MN+MIEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, nonacid, frigid Histic Humaquepts
TYPICAL PEDON: Hamre muck with a concave slope of 1 percent on a till plain, in a cultivated field at 1,160 feet elevation. (Colors are for moist soil unless otherwise stated.)
Oa--0 to 13 inches; black (10YR 2/1) muck (rubbed and broken face sapric material); about 10 percent unrubbed fibers less than 5 percent rubbed; weak fine granular structure; very friable; many fine and medium roots; moderately acid; clear smooth boundary. (8 to 16 inches thick)
A--13 to 18 inches; black (10YR 2/1) loam; very dark gray (10YR 3/1) dry; weak fine subangular blocky structure; friable; many fine and medium roots; common reddish brown (5YR 4/4) organic stains filling root voids; common fine faint dark gray (10YR 4/1) iron concentrations; about 3 percent gravel; neutral; clear smooth boundary. (0 to 7 inches thick)
Bg--18 to 35 inches; grayish brown (2.5Y 5/2) clay loam; weak very fine subangular blocky structure; friable; few fine roots; few reddish brown (5YR 4/4) organic stains filling root voids; common medium distinct light olive brown (2.5Y 5/4) iron concentrations; about 5 percent gravel; strongly effervescent; slightly alkaline; gradual wavy boundary. (0 to 48 inches thick)
BCg--35 to 71 inches; gray (5Y 5/1) clay loam; weak very fine subangular blocky structure; very friable; many coarse distinct light olive brown (2.5Y 5/6) and few medium prominent brown (7.5YR 4/4) iron concentrations; about 3 percent gravel and 1 percent cobbles with 1 percent shale fragments; strongly effervescent; slightly alkaline; gradual wavy boundary. (0 to 46 inches thick)
Cg--71 to 80 inches; olive gray (5Y 4/2 and 5Y 5/2) clay loam; massive; friable; common medium prominent yellowish brown (10YR 5/6) iron concentrations and common medium distinct olive brown (2.5Y 4/4) iron concentrations; about 3 percent gravel and 1 percent cobbles; strongly effervesent; moderately alkaline.
TYPE LOCATION: Pennington County, Minnesota; about 6 miles east and 4 miles south of High Landing; 2,400 feet south and 100 feet east of the northwest corner of sec. 8, T. 152 N., R. 39 W., USGS Erie topoquadrangle, lat. 48 degrees 00 minutes 04 seconds N., long. 95 degrees 41 minutes 22 seconds W., NAD27.
RANGE IN CHARACTERISTICS: Thickness of the histic epipedon ranges from 8 to 16 inches. Depth to free carbonates ranges from 12 to 25 inches. The mineral soil contains 0 to 15 percent rock fragments and the clay content ranges from 18 to 35 percent. The organic soil may contain a hemic layer up to 4 inches thick.
The Oa horizon has hue of 10YR to 5Y, value of 2 or 3, chroma of 1 or 2, or is N2/0 or N3/0. Reaction is strongly acid to slightly alkaline.
The A horizon has hue of 10YR to 5Y, value of 2 or 3, chroma of 1 or 2, or is N2/0 or N3/0. Texture fine sandy loam, loam, clay loam, sandy clay loam, and silt loam and the mucky analogues. Reaction is moderately acid to slightly alkaline.
The Bg or Bkg horizon has hue of 2.5Y or 5Y, value of 4 to 6, and chroma of 1 to2. Few to many distinct and prominent redoximorphic features are present. It is loam, clay loam or sandy clay loam. Textures of silt loam and silty clay loam occur where a lacustrine mantle is present. Reaction is slightly alkaline or moderately alkaline. Some pedons are slightly acid or neutral in the upper part.
The Cg, BCg, CBkg, or BCkg horizon has hue of 2.5Y or 5Y, value of 4 to 6 and chroma of 1 or 2. It has textures of loam, clay loam or silty clay loam. It has 18 to 35 percent clay and more than 15 percent fine sand and coarser sand. Reaction is slightly alkaline or moderately alkaline. Calcium carbonate equivalent ranges from 10 to 25 percent. Moist bulk density ranges from 1.35 to 1.60 g/cc. Thin coarser textured layers are in some pedons.
COMPETING SERIES: These are in the Blackhoof series. Blackhoof soils contain carbonates at depths greater than 40 inches and have hues redder than 2.5Y in the lower part of the series control section.
GEOGRAPHIC SETTING: Typically this soil is on plane or slightly concave positions with gradient of 0 to 1 percent on lake plains, moraines and till plains. These soils formed in a thin layer of organic soil material overlying calcareous loamy till or lacustrine sediments of the late Wisconsinan age. Mean annual air temperature ranges from 36 to 45 degrees F. Mean annual precipitation ranges from 19 to 28 inches. Frost-free days range from 88 to 140 days. Elevation above sea level ranges from 750 to 1,600feet.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Cathro, Chilgren, Northwood, Roliss, Smiley, and Vallers series. The Cathro soils have thicker organic material. The Chilgren, Roliss, Smiley, and Vallers soils lack histic epipedons, are better drained, and are on higher lying positions. The Northwood soils are in similar landscape positions and have a sandy mantle overlying loamy sediments.
DRAINAGE AND PERMEABILITY: Very poorly drained. Surface runoff is very low to ponded. Permeability is moderate or moderately slow. Depth to seasonal high soil saturation is on the surface in normal years from January to December. In addition ponding can occur in normal years during the months of January to December.
USE AND VEGETATION: Native vegetation is water tolerant grasses, reeds, and sedges with scattered willows and alders. Many areas that are drianed, are used for growing crops, hay, and pasture.
DISTRIBUTION AND EXTENT: MLRA-56, 57, and 88. Northwestern and north central Minnesota. This soil is moderately extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: St. Paul, Minnesota
SERIES ESTABLISHED: Pennington County, Minnesota, October, 1981.
REMARKS: Diagnostic horizons and features recognized are: histic epipedon - surface to 13 inches (Oa horizon); aquic moisture regime based on histic epipedon, low chroma and redox features.
This soil was previously included in with Haug muck.