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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 .
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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.
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.
Immobilization and stabilization of organic matter, Fe and Al into the subsoil. [ 11 ] [ 13 ] [ 14 ] Podzol A layers In the topsoil of acidic soils, organic matter (mostly from plant litter , the humus layer and root exudates ) together with Al- and Fe-ions, form organo-mineral complexes.
The solum (plural, sola) in soil science consists of the surface and subsoil layers that have undergone the same soil forming conditions. The base of the solum is the relatively unweathered parent material. Solum and soils are not synonymous. Some soils include layers that are not affected by soil formation. These layers are not part of the solum.
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.