Soil Textures
What soil has the largest particle size?
Sand
Define permeability
The ability of water and air to move through the soil.
If the distance out is 100' and down 2', what is the slope percentage?
2%
True or False. The proper order for soil horizons is A, O, B, C and R.
False, O, A, B, C and R
What is considered the worst land classification?
Class 8
__________ is a smooth material that is felt when soil is rubbed between fingers. It is neither gritty nor sticky
Silt
Soil texture has nothing to do with permeability. True or False
False
If the distance went out 25' and down 3', what is the slope percentage?
12%
When a farmer is plowing a field, which horizons do you think he would be hitting with a deep plow?
More than likely horizons O and A
What is the best land capability class?
Class 1
What is the name of a combination of two soil types?
Loam
What type of soil would be considered to have very slow permeability?
Clay
True or False. A slope of 4% is considered a Land capability class 1.
False, that would be considered class 2
What is an example of something that could be present in the O horizon?
former crop cover, small organisms, etc.
Soil type, amount of irrigation, slope, anything that would inhibit potatoes growing healthily.
What is the name of the test used when we press dirt with our fingers to determine texture?
Ribbon Test
Why would it be important in some crops that rely on heavy irrigation to be in soils that have rapid permeability?
To minimize humidity or the chances of mold growing.
If the distance went out 10' and down 1.75', what would be the slope percentage?
17.5%
What type of rock is common around here, usually a large and white in color.
Caleche
What are three things that keep an area out of a class 1 land capability?
Surface texture, permeability, depth, slope, erosion, surface runoff, surface stones, flooding, climate, water table.....
Clay has a coarse texture. True or False
False
Would compaction have anything to do with how permeable the ground is? Why or why not?
Yes, if the ground is compressed, it is pressing the soil particles closer together, making it less permeable.
If the distance went out 5' and went down 2". What is the slope percentage?
3.3333%
The substance that creates the soil to turn red in color is a result of __________
Iron Oxide
What type of irrigation is the FFA field?
Rill irrigation