Kandiudult, Arenic Plinthic
A representative soil profile of an Arenic Plinthic Kandiudult from Florida. (Photo provided by M. Collins.)
Arenic Plinthic Kandiudults have a layer, starting at the mineral soil surface, that has a sandy or sandy-skeletal particle-size class and is between 50 and 100 cm thick. They also have 5 to 50 percent (by volume) plinthite in one or more horizons within 150 cm of the mineral soil surface. These soils are of very small extent in the United States.
Kandiudults are the Udults that are very deep and have a kandic horizon and a clay distribution in which the percentage of clay does not decrease from its maximum amount by as much as 20 percent within a depth of 150 cm from the mineral soil surface, or the layer in which the clay percentage decreases has at least 5 percent of the volume consisting of skeletans on faces of peds and there is at least a 3 percent (absolute) increase in clay content below this layer. These soils do not have a fragipan or a horizon in which plinthite either forms a continuous phase or constitutes one-half or more of the volume within 150 cm of the mineral soil surface. Kandiudults are of moderate extent in the
Udults are the more or less freely drained, humus-poor Ultisols that have a udic moisture regime. They are in humid climates, and most receive well distributed rainfall. Most have light colored upper horizons, commonly a grayish horizon that rests on a yellowish brown to reddish argillic or kandic horizon. A few that developed from basic rocks have a dark brown or reddish brown surface horizon that rests on a dark red or dusky red argillic or kandic horizon. Some have a fragipan or plinthite, or both, in or below the argillic or kandic horizon. Udults developed in sediments and on surfaces that range from late Pleistocene to Pliocene or possibly older. Many are cultivated, either with the use of soil amendments or in a system in which they are cropped for a very few years and then are returned to forest to allow the trees to regather in their tissues the small supply of nutrients. Most of these soils have or had a forest vegetation, but some have a savanna that probably is anthropic.
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...
Kandiudult, Arenic Plinthic
A representative soil profile of an Arenic Plinthic Kandiudult from Florida. (Photo provided by M. Collins.)
Arenic Plinthic Kandiudults have a layer, starting at the mineral soil surface, that has a sandy or sandy-skeletal particle-size class and is between 50 and 100 cm thick. They also have 5 to 50 percent (by volume) plinthite in one or more horizons within 150 cm of the mineral soil surface. These soils are of very small extent in the United States.
Kandiudults are the Udults that are very deep and have a kandic horizon and a clay distribution in which the percentage of clay does not decrease from its maximum amount by as much as 20 percent within a depth of 150 cm from the mineral soil surface, or the layer in which the clay percentage decreases has at least 5 percent of the volume consisting of skeletans on faces of peds and there is at least a 3 percent (absolute) increase in clay content below this layer. These soils do not have a fragipan or a horizon in which plinthite either forms a continuous phase or constitutes one-half or more of the volume within 150 cm of the mineral soil surface. Kandiudults are of moderate extent in the
Udults are the more or less freely drained, humus-poor Ultisols that have a udic moisture regime. They are in humid climates, and most receive well distributed rainfall. Most have light colored upper horizons, commonly a grayish horizon that rests on a yellowish brown to reddish argillic or kandic horizon. A few that developed from basic rocks have a dark brown or reddish brown surface horizon that rests on a dark red or dusky red argillic or kandic horizon. Some have a fragipan or plinthite, or both, in or below the argillic or kandic horizon. Udults developed in sediments and on surfaces that range from late Pleistocene to Pliocene or possibly older. Many are cultivated, either with the use of soil amendments or in a system in which they are cropped for a very few years and then are returned to forest to allow the trees to regather in their tissues the small supply of nutrients. Most of these soils have or had a forest vegetation, but some have a savanna that probably is anthropic.
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...