A soil Profile
If friend look in a floor pit or ~ above a roadside cut, you will see assorted layers in the soil. These layers are dubbed soil horizons. The plan of these horizons in a soil is recognized as a soil profile. Floor scientists, who are also called pedologists, observe and also describe soil profiles and soil horizons to classify and interpret the floor for assorted uses.
You are watching: The vertical sequence of the layers of soil is called a soil
Soil horizons differ in a variety of easily checked out soil properties such together color, texture, structure, and also thickness. Various other properties are less visible. Properties, such together chemical and also mineral content, consistence, and reaction call for special laboratory tests. Every these properties are provided to define types of floor horizons.
Soil scientists use the resources letters O, A, B, C, and E to recognize the grasp horizons, and also lowercase letter for differentiate of these horizons. Many soils have three significant horizons -- the surface horizon (A), the subsoil (B), and the substratum (C). Part soils have an essential horizon (O) top top the surface, however this horizon can likewise be buried. The understand horizon, E, is supplied for subsurface horizons that have actually a far-reaching loss of mineral (eluviation). Tough bedrock, i beg your pardon is no soil, supplies the letter R.
ProjectPrint the soil profile cards ~ above cardstock file or attract your own design on a 3" x 5" note card. (The following files will print 6 cards every page.)
Soil file Cards (DOC; 340 KB)Soil profile Cards (PDF; 115 KB)Cut the cards apart.Attach a quick strip of carpet tape to the card. Rolls of double-sided tape come in various widths. One-inch tape is adequate.
You can demonstrate erosion severity by changing the depth of the A horizon or display various species for soils uncovered in various locations.
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Displays have the right to be make of numerous soils on a illustration of a hill steep or various other landscape by making use of the tape on a larger card or poster.
Have fun with soils!
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