Wetland classification, identification, delineation-2004

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� Of�ficial Serics Ucscription - ANOK�� ri�s Pa�� ? uf�i � �[�hc Ap horizc�n has value ot�3 or 4 and cflroma oF l or 2. Some pedons have an A horizon 1 to �t inches thick with hue of lOYR, value of 2 or 3, and chroma of 1 or 2. The E horizon and E part of the E&Bt horizon have value 4 to 6 and chroma 2 to 4. "Chese horizons have high chroma mottles adjacent to the ' E3t horizon in some pedons. The A and E horizons are tine sand, very tine sand, loamy tine sand, or loamy very tlne sand. � The Bt horizon and Bt part of the E&Bt horizon have hue of lOYR to SYR and value and chroma of 3 to 5. The combined thickness of the Bt horizon is 6 to 24 inches. It typically is loamy very fine sand, very fine sandy loam, or fine sandy loam and less commonly loam or sandy clay loam in subhorizons of some , pedons. The Bt has B/A clay ratios that range from l.� to 6.0 and are commonly near the higher part of the range. It has 6 to 18 percent clay and 15 to 40 percent fine sand and coarser. It has few to many clay bridges between sand grains or few to many, faint or distinct clay films. It has individual Bt subhorizons ' that coalesce in some pedons. The C horizon, where present, has hue of lOYR or 7.SYR and is fine sand or very fine sand. ' COMPETING SERIES: The Arland, Chetek, Hoden�l, and Montcalm series. The Arland soils have a P paralithic contact of sandstone bedrock between depths of 20 to 40 inches. Chetek soils have 2C ' horizons of sand and gravel beginning at depths ranging from 12 to 24 inches and do not have E&Bt horizons. Hodenpyl soils have dominantly medium sands throughout the control section. Montcalm soils typically have sandy loam and sandy clay loam Bt horizons. ' GEOGRAPHIC SETTING: These soils have plane or slightly convex slopes with gradients of 0 to 18 percent and are on glacial outwash plains, stream terraces and lake plains. They formed in sandy and ' coarse-loamy glacial outwash or lacustrine sediments of Late Wisconsin Age. Mean annual air temperature ranges from 42 to 45 degrees F. Mean annual precipitation ranges from 24 to 30 inches. ' GEOGRAPHICALLY ASSOCIATED SOILS: The Zimmerman, Lino, Soderville, and Isanti soils are the main ones. The excessively drained Zimmerman soils are sandy and are on more undulating landscapes. The somewhat poorly drained Lino and Soderville soils are on less sloping, lower lying ' areas and have water tables at higher depths. The very poorly drained Isanti soils are in depressions. DRAINAGE AND PERMEABILITY: Well drained. Permeability is moderately rapid to rapid. ' Surface runoff is very low to low. USE AND VEGETATION: The majority of this soil is cropped to corn, soybeans, and alfalfa. ' Significant areas are in forest or wooded pasture. Native vegetation was deciduous forest with oaks being the major species and aspen being a common secondary species. ' DISTRIBUTION AND EXTENT: East-central Minnesota. Moderately extensive. , MLRA OFFICE RESPONSIBLE: St. Paul, Minnesota SERIES ESTABLISHED: Isanti County, Minnesota, 1956. ' REMARKS: Diagnostic horizons and features recognized in this pedon are: ochric epipedon - the zone from the surface to 36 inches (Ap, El, and E2 horizons); argillic horizon - the zone from 36 to 70 inches � (Bt horizon and the Bt part of the E&Bt horizons). �nLiTivivrii I2ATA: Refer to S61-Minn-30-1 for some physical and chemical properties of the ' http://ortho.ftw.nres.usda.gov/cgi-bin/osd/osdname.cgi?-P 6/17/2004