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B horizon
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- The B horizon, or subsoil, is an accumulation of mostly fine material that has moved downward, resulting in a dense layer in the soil. In some soils, the B horizon contains nodules or a layer of calcium carbonate.
Feb 17, 2023 · This layer is the uppermost layer of the soil rich in organic matter, such as the remains of plants and dead animals. Due to high organic content, this layer is typically black brown or dark brown. The O horizon is thin in some soil, thick in some others, or absent in the rest.
The horizon description system begins by splitting soil horizons into two distinct groups: organic and mineral horizons. Organic horizons are those that contain 17% or more organic carbon; mineral horizons have less than 17% organic carbon.
Soil is defined herein as the naturally occurring, unconsolidated mineral or organic material at least 10 cm thick that occurs at the earth's surface and is capable of supporting plant growth.
Oct 31, 2023 · In some soils, the B horizon contains nodules or a layer of calcium carbonate. The C horizon, or soil base, includes the parent material, plus the organic and inorganic material that is broken down to form soil.
Jun 7, 2020 · What Are Soil Horizons? Soil horizons, according to Britannica, are layers of soil that are underground, which “develop from the combined actions of living organisms and percolating water.” This definition basically means that many living creatures and other forces of nature shape the soil in a way that creates identifiable layers.
A soil horizon is a distinct layer within the soil profile that has unique physical and chemical properties, formed as a result of various processes such as weathering, organic matter accumulation, and biological activity.
A soil profile is the complete set of soil layers. Each layer is called a horizon. Called the A horizon, the topsoil is usually the darkest layer of the soil because it has the highest proportion of organic material.
