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The Unified Soil Classification System (USCS) is a soil classification system used in engineering and geology to describe the texture and grain size of a soil. The classification system can be applied to most unconsolidated materials, and is represented by a two-letter symbol. Each letter is described below (with the exception of Pt): If the ...
Top 25 water ports by tonnage. This is a list of ports of the United States, ranked by tonnage. [1] Ports in the United States handle a wide variety of goods that are critical to the global economy, including petroleum, grain, steel, automobiles, and containerized goods. See the articles on individual ports for more information, including ...
A taxonomy is an arrangement in a systematic manner; the USDA soil taxonomy has six levels of classification. They are, from most general to specific: order, suborder, great group, subgroup, family and series. Soil properties that can be measured quantitatively are used in this classification system – they include: depth, moisture ...
Topsoil is composed of mineral particles and organic matter and usually extends to a depth of 5-10 inches (13–25 cm). Together these make a substrate capable of holding water and air which encourages biological activity. There are generally a high concentration of roots in topsoil since this is where plants obtain most of their vital nutrients.
A state soil is a soil that has special significance to a particular state. Each state in the United States has selected a state soil, twenty of which have been legislatively established. These official state soils share the same level of distinction as official state flowers and birds. Also, representative soils have been selected for Puerto ...
The American Bureau of Shipping (ABS) is an American maritime classification society established in 1862. [1] Its stated mission is to promote the security of life, property, and the natural environment, primarily through the development and verification of standards for the design, construction and operational maintenance of marine and ...
In the United States, over 19,000 soil series have been identified. [1] The percentages of land area (in the US and associated territories, etc.) occupied by soils of the twelve orders have been estimated [1] as: Alfisols and Inceptisols occur widely in the US, but the circumstances of their occurrence would be difficult to characterize briefly.
Port Silt Loam is the state soil of Oklahoma. This type of soil is reddish in color due to the weathering of reddish sandstones, siltstones, and shales of the Permian period. It is a medium-textured alluvial soil deposited along flood plains. Port Silt Loam can be found in 33 of the 77 counties in Oklahoma and covers around one million acres ...