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Map of the United States showing what percentage of the soil in a given area is classified as an Ultisol-type soil. The great majority of the land area classified in the highest category (75%-or-greater Ultisol) lies in the South and overlays with the Piedmont Plateau, which runs as a diagonal line through the South from southeast (in Alabama) to northwest (up into parts of Maryland).
The Sassafras soil series is one of the oldest in the United States and has great historical significance to modern-day soil science.It was recognized as Maryland's state soil in 1901 and is now identified as a Benchmark (a soil that has large extent in major resource areas) and Hall of Fame soil series, which is a recognition given to a soil series for having a critical role in the evolution ...
The soil moisture regime, often reflective of climatic factors, is a major determinant of the productivity of terrestrial ecosystems, including agricultural systems. The soil moisture regimes are defined based on the levels of the groundwater table and the amounts of soil water available to plants during a given year in a particular region.
The rate at which a soil can absorb water depends on the soil and its other conditions. As a plant grows, its roots remove water from the largest pores (macropores) first. Soon the larger pores hold only air, and the remaining water is found only in the intermediate- and smallest-sized pores . The water in the smallest pores is so strongly held ...
Tilth is a physical condition of soil, especially in relation to its suitability for planting or growing a crop. Factors that determine tilth include the formation and stability of aggregated soil particles, moisture content, degree of aeration, soil biota, rate of water infiltration and drainage.
Agriculture is an important part of Maryland's economy. The US state of Maryland has large areas of fertile agricultural land in its coastal and Piedmont zones, though this land use is being encroached upon by urbanization.
Like many larger farms, she plants cover crops in fields that would otherwise be bare between planting season, along with no-till practices. That keeps organic matter in the soil, helping to ...
Photograph taken 21 March 2010 in Norwich, Vermont. Frost heaving (or a frost heave) is an upwards swelling of soil during freezing conditions caused by an increasing presence of ice as it grows towards the surface, upwards from the depth in the soil where freezing temperatures have penetrated into the soil (the freezing front or freezing boundary).