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Subsoil layer. Subsoil is the layer of soil under the topsoil on the surface of the ground. Like topsoil, it is composed of a variable mixture of small particles such as sand, silt and clay, but with a much lower percentage of organic matter and humus. The subsoil is labeled the B Horizon in most soil mapping systems.
"Subsoil" is a short story by American writer Nicholson Baker, which first appeared in The New Yorker periodical on June 27, 1994. [ 1 ] The story is about a man who meets his doom after being assaulted and forced by attacking, sprouting potatoes that lure agriculturalists into their sleepy Krebs Cycle .
Start downloading a Wikipedia database dump file such as an English Wikipedia dump. It is best to use a download manager such as GetRight so you can resume downloading the file even if your computer crashes or is shut down during the download. Download XAMPPLITE from (you must get the 1.5.0 version for it to work). Make sure to pick the file ...
Soil scientists use the capital letters O, A, B, C, and E to identify the master horizons, and lowercase letters for distinctions of these horizons. Most soils have three major horizons—the surface horizon (A), the subsoil (B), and the substratum (C). Some soils have an organic horizon (O) on the surface, but this horizon can also be buried.
The classic Houdek soil profile includes: a 6-8 inch friable, neutral, black loam topsoil; a 10 to 15 inch friable, neutral, dark brown clay loam subsoil; a 15 to 30 inch friable, calcareous, moderately alkaline, olive brown clay loam subsoil; and 20+ inches of friable, light olive brown, calcareous, moderately alkaline clay loam parent material.
They also occur in humid to perhumid subtropical regions, where they are associated with Acrisols and Planosols. with a light-coloured, coarse-textured, surface horizon that shows signs of periodic water stagnation and abruptly overlies a dense, slowly permeable subsoil with significantly more clay than the surface horizon.
Claypan is a dense, compact, slowly permeable layer in the subsoil. [1] It has a much higher clay content than the overlying material, from which it is separated by a sharply defined boundary. The dense structure restricts root growth and water infiltration. Therefore, a perched water table might form on top of the claypan. [2]
Subsoiling is a slow operation and requires high power input: 60 to 100 horsepower (45 to 75 kW) to pull a single subsoil point through a hard soil. Typically, a subsoiler mounted on a compact utility tractor will reach depths of about 30 cm (12 in) and have only one thin blade with a sharpened tip.