Haplosaprist, Terric
A representative soil profile of a Terric Haplosaprist from the Ralsko region, Czech Republic. (Photo provided by P. Samonil.)
Terric Haplosaprists differ from Typic Haplosaprists because they have a mineral layer 30 cm or more thick that has its upper boundary within the control section, below the surface tier. These soils are widely distributed in the United States, mostly in the Eastern States. They are used mainly as woodland, cropland, or wildlife habitat.
Haplosaprists are the Saprists that have a temperature regime warmer than cryic and that do not have a sulfuric horizon with its upper boundary within 50 cm of the soil surface or sulfidic materials within 100 cm of the soil surface. These soils are wet at the base of the surface tier for more than 30 cumulative days during normal years unless they have been drained. The organic materials in these soils are from many kinds of plant materials, including wood, moss, grass, and herbaceous materials. If these soils are drained and cultivated under the present technology, the organic materials decompose and disappear slowly or rapidly, depending on the management used and the temperature. Eventually, within some decades, the Haplosaprists that are drained and cultivated will be replaced by mineral soils. This conversion of some of the soils has been observed in the United States. Many Haplosaprists support native vegetation, mostly forest plants or shrubs and grasslike plants. Many areas are cleared, drained, and used as cropland.
Saprists are the wet Histosols in which the organic materials are well decomposed. The botanic origin of the organic material is difficult to determine in most of these soils. The fiber content is less than one-sixth after rubbing between the thumb and fingers. Most of these soils have a bulk density of more than 0.2 g/cm3. Saprists occur in areas where the ground water table tends to fluctuate within the soils or in areas where the soils were aerobic during drier periods in the past. They consist of the residue that remains after the aerobic decomposition of organic matter. When drained, fibric and hemic materials commonly decompose to form sapric materials. If the organic materials are deep and are drained either artificially or naturally, the Fibrists and Hemists are converted after some decades to Saprists.
For more information about soils and the Michigan State University-Department of Geography, visit:
project.geo.msu.edu/soilprofiles/
For additional information about soil classification, visit:
www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/survey/cla...
Haplosaprist, Terric
A representative soil profile of a Terric Haplosaprist from the Ralsko region, Czech Republic. (Photo provided by P. Samonil.)
Terric Haplosaprists differ from Typic Haplosaprists because they have a mineral layer 30 cm or more thick that has its upper boundary within the control section, below the surface tier. These soils are widely distributed in the United States, mostly in the Eastern States. They are used mainly as woodland, cropland, or wildlife habitat.
Haplosaprists are the Saprists that have a temperature regime warmer than cryic and that do not have a sulfuric horizon with its upper boundary within 50 cm of the soil surface or sulfidic materials within 100 cm of the soil surface. These soils are wet at the base of the surface tier for more than 30 cumulative days during normal years unless they have been drained. The organic materials in these soils are from many kinds of plant materials, including wood, moss, grass, and herbaceous materials. If these soils are drained and cultivated under the present technology, the organic materials decompose and disappear slowly or rapidly, depending on the management used and the temperature. Eventually, within some decades, the Haplosaprists that are drained and cultivated will be replaced by mineral soils. This conversion of some of the soils has been observed in the United States. Many Haplosaprists support native vegetation, mostly forest plants or shrubs and grasslike plants. Many areas are cleared, drained, and used as cropland.
Saprists are the wet Histosols in which the organic materials are well decomposed. The botanic origin of the organic material is difficult to determine in most of these soils. The fiber content is less than one-sixth after rubbing between the thumb and fingers. Most of these soils have a bulk density of more than 0.2 g/cm3. Saprists occur in areas where the ground water table tends to fluctuate within the soils or in areas where the soils were aerobic during drier periods in the past. They consist of the residue that remains after the aerobic decomposition of organic matter. When drained, fibric and hemic materials commonly decompose to form sapric materials. If the organic materials are deep and are drained either artificially or naturally, the Fibrists and Hemists are converted after some decades to Saprists.
For more information about soils and the Michigan State University-Department of Geography, visit:
project.geo.msu.edu/soilprofiles/
For additional information about soil classification, visit:
www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/survey/cla...