What is Toposequence?
A sequence of soils in which distinctive soil characteristics are related to topographic situation. From: toposequence in A Dictionary of Plant Sciences »
What is Plinthite formation?
Plinthite (from the Greek plinthos, brick) is an iron-rich, humus-poor mixture of clay with quartz and other minerals. Plinthite is a redoximorphic feature in highly weathered soil. Generally, plinthite forms in a soil horizon that is saturated with water for some time during the year.
What is Toposequence in soil science?
In soil: Topography. …of local topography are called toposequences. As a general rule, soil profiles on the convex upper slopes in a toposequence are more shallow and have less distinct subsurface horizons than soils at the summit or on lower, concave-upward slopes.
What is soil characterization?
Soil characterization is an essential part of the determination of the nature and extent of contamination in soils. The pedon approach characterizes a soil based on physical soil properties such as texture, structure, consistence, etc.
What are the main features of Toposequence?
Pedogenesis and Soil Taxonomy Toposequence presently carries with it a morphologic connotation; a change in colors, predominantly a change in grayness, that is related to relative elevation and thus to changes in hydrology. Catena on the other hand carries with it a process-response connotation.
What is soil Catena?
A catena is the sequence of soils from hilltop to valley floor. The soil down a hill slope is rarely uniform. Soil eroded from the top of the slope tends to accumulate near the bottom.
How do Fragipans form?
Their formation can be attributed to compacting of soils by glaciers during the last ice age, physical ripening, permafrost processes, or other events that occurred in the pleistocene age. Some fragipans inherit their properties from buried soils called paleosols.
What are the five soil forming factors?
The whole soil, from the surface to its lowest depths, develops naturally as a result of these five factors. The five factors are: 1) parent material, 2) relief or topography, 3) organisms (including humans), 4) climate, and 5) time.
What is the difference between Catena and toposequence?
Toposequence presently carries with it a morphologic connotation; a change in colors, predominantly a change in grayness, that is related to relative elevation and thus to changes in hydrology. Catena on the other hand carries with it a process-response connotation.
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What are toposequences and sediment Cascades?
This notion is reflected in the concept of toposequences (sequences of landforms along a topographic gradient) and their relationship with sediment cascades (Burt and Allison, 2010) as some toposequences are disconnected with respect to sediment transport (see also Meßenzehl et al., 2014, and references therein).
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