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In general, the organic soils have a thick layer of dark gray, relatively undecomposed organic material over a gray, clayey subsoil. The mineral soils have a surface of dark gray, highly decomposed organic material over a gray, clayey subsoil.
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Texas State Soil. Houston Black is the state soil of Texas. The Houston Black soil developed from calcareous clays and marls that were deposited during the Cretaceous Age from the receding and advancing of ancient seas. The soil is dark in color and is sticky and moldable when wet.
General Soil Map of Texas. Soil, a natural body composed of minerals, organic matter, liquids, and gases, occurs on Earth's surface and supports plant growth. Soils form in environments ranging from desert landscapes to coastal grassflats permanently covered by water up to 2.5 m deep.
Most Houston Black soil is found on farms, with the majority growing cotton, sorghum, and corn, but hay and pastureland are also common (Figure 6). It is one of the highest agricultural producing soils in Texas, generating between $300 to $500 million in annual revenue.
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The surface layer has the maximum accumulation of organic matter and is the horizon of maximum leaching of clay minerals and of iron and aluminum oxides. Some soils have a subsurface layer below the surface layer.
Jun 13, 2020 · The continual lowering of the surface by physiographic reduction in the case of the marly formations, makes available a continuous replenishment of soil with calcareous materials. The prairie soils of Texas are the premier cotton soils of the state, alluvial soils alone excepted.
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Apr 22, 2022 · Overview. Soil is a layer of unconsolidated (i.e., loose) mineral and/or organic material. Soil is nearest to the Earth's surface in terrestrial areas (not covered by water). Soil makes up a very small percentage of the Earth's crust.
