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Throughout the Pliocene and Oligocene, the area experienced widespread erosion. Much of the soil and sediments near the surface in Arkansas formed during the last 2.5 million years of the Quaternary. In the Pleistocene, zones of alpine snow pack, akin to small glaciers formed in the Ouachita Mountains and Boston Mountains.
This is a list of U.S. state soils. 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.
Stuttgart soil series is an officially designated state symbol, the State Soil of Arkansas. Stuttgart soils are named for the City of Stuttgart in southeast Arkansas. They are used primarily for crops , mainly rice , soybeans , small grains , and corn .
The Universal Soil Loss Equation (USLE) is a widely used mathematical model that describes soil erosion processes. [1]Erosion models play critical roles in soil and water resource conservation and nonpoint source pollution assessments, including: sediment load assessment and inventory, conservation planning and design for sediment control, and for the advancement of scientific understanding.
This list of ecoregions in the United States provides an overview of United States ecoregions designated by the U.S. Environmental Protection Agency (EPA) and the Commission for Environmental Cooperation (CEC).
Location of Arkansas in the United States. Arkansas is located in the southeastern United States, in the West South Central Census Bureau division. Arkansas covers an area of 53,179 square miles (137,733 km²) and ranks as the 29th largest state by size. [7]
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):
The Arkansas/Ouachita River Holocene Meander Belts ecoregion is a flat to nearly flat floodplain containing the meander belts of the present and past courses of the lower Arkansas River and Ouachita Rivers. Point bars, natural levees, swales, and abandoned channels marked by meander scars and oxbow lakes are common and characteristic.