The work of German photographer Thomas Demand achieves a disquieting balance between the two. Histic epipedon: from the surface to a depth of 23 cm (9 inches) (Oap horizon).Ĭambic horizon: from a depth of 23 to 43 cm (9 to 17 inches) (Bg horizon).Īquic conditions: redoximorphic features present in all mineral horizons below the histic epipedon.Photographs can seem convincingly real or strangely artificial. REMARKS: Diagnostic horizons and features recognized in this pedon are:
#THE MEDIUM THOMAS OFFICE SERIES#
SERIES ESTABLISHED: Tuscola County, Michigan, 1926. MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: AMHERST, MASSACHUSETTS
A few small areas are used for the production of corn, small grain and hay.ĭISTRIBUTION AND EXTENT: MLRAs 96, 98, and 99 in lower Michigan. USE AND VEGETATION: Most areas of this soil are used for pasture or are in woodland. Saturated hydraulic conductivity is moderately low or moderately high. Potential for surface runoff is negligible. Parkhill soils lack the organic surface layer that is present in the Thomas soils.ĭRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Poorly drained or very poorly drained. GEOGRAPHICALLY ASSOCIATED SOILS: Thomas soils are associated in the landscape with Mean annual temperature ranges from 7.2 to 10.0 degrees C (45 to 50 degrees F). Mean annual precipitation ranges from 711 to 864 mm (28 to 34 inches). They formed in organic materials less than 41 cm (16 inches) thick overlying calcareous loamy till or lacustrine materials. GEOGRAPHIC SETTING: Thomas soils are on nearly level till plains and lake plains. Texture: clay loam, loam, silt loam, sandy clay loam, or silty clay loam some pedons contain strata of silty clay, silty loam, or sandĬOMPETING SERIES: There are no other series in the same family. Reaction: slightly alkaline or moderately alkaline slightly or strongly effervescent Texture: clay loam, sandy clay loam, loam, silt loam, or silty clay loam Texture: muck, mucky sandy loam, mucky silt loam, or mucky loam Mean annual soil temperature: 8 to 11 degrees C (47 to 52 degrees F) Thickness of the solum: typically 36 to 61 cm (14 to 24 inches) but ranges from 25 to 61 cm (10 to 24 inches) TYPE LOCATION: Gratiot County, Michigan about 1 mile west of Ithaca 1,950 feet east and 550 feet south of the northwest corner of sec. Ĭ2g-96 to 152 cm (38 to 60 inches) gray (10YR 6/1) loam massive friable many coarse prominent yellowish brown (10YR 5/6) and few medium distinct light yellowish brown (10YR 6/4) masses of oxidized iron 4 percent gravel 1 percent cobbles slightly effervescent moderately alkaline. Ĭ1g-43 to 96 cm (17 to 38 inches) gray (10YR 5/1) clay loam weak medium subangular blocky structure firm few fine roots many medium prominent yellowish brown (10YR 5/6 and 5/8) masses of oxidized iron 2 percent gravel 1 percent cobbles strongly effervescent moderately alkaline abrupt wavy boundary. ī1g-23 to 43 cm (9 to 17 inches) dark gray (10YR 4/1) clay loam weak coarse subangular blocky structure firm common fine roots many medium prominent yellowish brown (10YR 5/6) masses of oxidized iron 3 percent gravel 1 percent cobbles slightly effervescent slightly alkaline clear wavy boundary. Oap-0 to 23 cm (9 inches) black (10YR 2/1) broken face and rubbed muck moderate medium granular structure friable many fine roots neutral abrupt smooth boundary. (Colors are for moist soil unless otherwise stated.) TYPICAL PEDON: Thomas muck, on a nearly level area in a cultivated field. TAXONOMIC CLASS: Fine-loamy, mixed, semiactive, calcareous, mesic Histic Humaquepts Mean annual precipitation is about 762 mm (30 inches), and mean annual temperature is about 7.8 degrees C (46 degrees F). These soils are on till plains and lake plains. The Thomas series consists of very deep, poorly drained or very poorly drained soils formed in organic materials less than 41 cm (16 inches) thick overlying loamy till or lacustrine materials. Official Series Description - THOMAS Series
0 kommentar(er)
