9/24/2023 0 Comments Distinct soil horizon definitionTexture (fine-earth fraction)-sandy loam, fine sandy loam, loam, or sandy clay loamĬolor-5YR to 2.5Y, value of 4 to 6, chroma of 4 to 8 Texture (fine-earth fraction)-loamy sand, loamy fine sand, sandy loam, or fine sandy loamĬolor-hue of 7.5YR to 2.5Y, value of 4 to 6, chroma of 4 to 8 ![]() Texture (fine-earth textures)-loamy sand, loamy fine sand, sandy loam, fine sandy loam, or loamĪ horizon (if it occurs is 3 to 10 centimeters (1 to 4 inches) thick):Ĭolor-hue of 7.5YR to 2.5Y, value of 2 to 4, chroma of 1 to 4Ĭolor-hue of 7.5YR to 2.5Y, value of 4 to 6, chroma of 2 to 4 Soil Reaction: Extremely acid to strongly acid, throughout the profile, except where limedĬolor-hue of 7.5YR to 2.5Y, value of 4 or 5, chroma of 2 to 4 Rock Fragments: 0 to 20 percent, by volume in the A and B horizon and 0 to 30 percent in the C horizon, mostly quartz pebbles Solum Thickness: 64 to 127 centimeters (25 to 50 inches)ĭepth to Bedrock: Greater than 203 centimeters (80 inches)ĭepth to Seasonal High Water Table: Greater than 183 centimeters (72 inches) and longitude 76 degrees 39 minutes 11 seconds W., NAD 83 Major Land Resource Area 149A 235 50 feet east of Queen Tree Road into field USGS Mechanicsville topographic quadrangle latitude 38 degrees 24 minutes 12 seconds N. Mary's County, Maryland approximately 1.4 miles southeast of the Community of Laurel Grove 2,400 feet northeast of Rt. (Combined thickness of the Bt horizon is 25 to 51 centimeters (10 to 20 inches))Ĭ1-102 to 132 centimeters (40 to 52 inches) strong brown (7.5YR 5/6) gravelly sandy loam massive friable slightly sticky, nonplastic very strongly acid 3 percent small light yellowish brown (10YR 6/4) pockets of clay clear smooth boundary.Ĭ2-132 to 178 centimeters (52 to 70 inches) brownish yellow (10YR 6/8) loamy sand single grain loose nonsticky, nonplastic 5 percent, by volume fine strong brown (7.5YR 5/8) gravel extremely acid. (0 to 30 centimeters (0 to 12 inches) thick)īt1-53 to 81 centimeters (21 to 32 inches) brown (7.5YR 5/4) sandy clay loam weak medium subangular blocky structure friable, slightly sticky, slightly plastic few clay films on faces of peds very few roots very strongly acid clear smooth boundary.īt2-81 to 102 centimeters (32 to 40 inches) strong brown (7.5YR 5/6) sandy loam weak thick platy structure parting to weak fine subangular blocky structure friable slightly sticky, slightly plastic few clay films on faces of peds very few roots very strongly acid abrupt smooth boundary. (0 to 30 centimeters (0 to 12 inches) thick)īA-23 to 53 centimeters (9 to 21 inches) yellowish brown (10YR 5/4) loam moderate very fine to medium subangular blocky structure friable slightly sticky, slightly plastic few roots strongly acid clear smooth boundary. (Colors are for moist soil).Īp-0 to 23 centimeters (0 to 9 inches) brown (10YR 5/3) sandy loam weak very fine subangular blocky structure very friable slightly sticky, slightly plastic few roots strongly acid, abrupt smooth boundary. TYPICAL PEDON: Sassafras sandy loam, in a cultivated field. TAXONOMIC CLASS: Fine-loamy, siliceous, semiactive, mesic Typic Hapludults (1995) published by Manaaki Whenua Press, Lincoln, Canterbury, New Zealand.Official Series Description - SASSAFRAS Series Horizon notation and their definitions are in the Soil Description Handbook by Milne et al. ![]() Oh is an organic horizon of strongly decomposed material, Bt is a B horizon containing clay translocated from the horizon above,īg is a pale wet horizon with at least 2 % mottles. Other horizon notations include R for rock, O for organic material such as leaves or peat, and E for a layer leached of organic matter, iron or clay.Įach of these horizon notations can be made more specific by adding additional codes. C horizons are those which have been slightly altered by soil forming processes and generally occur deep in the soil. ![]() For example, the topsoil is referred to as the A horizon and subsoil horizons are referred to as B horizons. Soil horizons are usually given letter codes (horizon notation) to identify the type of horizon. These differences include colour, texture, structure, consistence, and coatings. A soil profile is made up of several horizons and each is distinguished from the horizon above or below by being different in one or more characteristics. Soil horizons are layers within the soil profile and are approximately parallel to the ground surface.
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