Textures
These are the 3 particles that make up all soil types.
What are sand, silt, and clay?
This the numerical system we use in Land Class.
What are Roman Numerals?
These flavors are associated with acidic and alkaline respectively.
What is sour and sweet?
These are two NATURAL causes of erosion.
What is wind and rain?
This is the natural force that breaks up bedrock.
What is erosion?
This is used to estimate soil texture.
What is Soil Ribboning?
There are this many Land Classes in the United States.
What is 8?
This is what we use to lower pH.
What is Gypsum &/or Sulfur?
This is the unit we measure our topsoil loss in.
What is percentage?
This is Nebraska's most commonly found soil texture.
What is Silt Loam?
This is found in soil, and is the largest source of energy/nutrients for plants and other organisms.
These 6 factors help us determine Land Class.
What is surface texture, permeability, drainage, flooding/ponding, slope, erosion?
These are the 3 macronutrients plants need to survive.
Nitrogen, Phosphorus, and Potassium
This is the equation for Loss of Topsoil percentage.
What is (Original topsoil- Surface thickness)/ Original topsoil?
This is what Lichens do to chemically break down rocl.
What is acid?
This combination of soil 30% clay, 10% silt, 60% sand results in this texture.
What is sandy clay loam?
Depth = Deep/Very Deep
Surface Texture = Fine
Permeability = Very Slow (VS)
Drainage = Well (W)
Slope (8%)
Erosion = All
Land Class =
IV
This is how plants show they are deficient in macronutrients.
What is changing colors?
This is the percent lost of topsoil with topsoil of 12 inches and surface thickness of 8 inches.
What is 33.33%?
These are the 4 top horizon symbols and names in order from top to bottom.
What is O- Organic, A- Topsoil, B- Subsoil, C- Parent Material
This combination of soil 21% sand, 46% silt, 33% clay results in this soil texture.
What is clay loam soil?
Depth = Deep/Very Deep
Surface Texture = Very Coarse
Permeability = All
Drainage = P
Slope (1%)
Erosion = All
Land Class =
V
This is the process when legumes pull nitrogen from the atmosphere and turn it into nitrate.
What is Nitrogen Fixation?
This is the percentage of topsoil lost with a topsoil of 15 inches and surface thickness of 3 inches.
What is 80%?
This is the largest source of energy & nutrients for plants other than organisms.