Horticulture Test 1 Review

Soil Textures

100

What soil has the largest particle size?

Sand

200

__________ is a smooth material that is felt when soil is rubbed between fingers. It is neither gritty nor sticky

Silt

300

What is the name of a combination of two soil types?

Loam

400

What is the name of the test used when we press dirt with our fingers to determine texture?

Ribbon Test

500

Clay has a coarse texture. True or False

False

Permeability

100

Define permeability

The ability of water and air to move through the soil.

200

Soil texture has nothing to do with permeability. True or False

False

300

What type of soil would be considered to have very slow permeability?

Clay

400

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.

500

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.

Slopes

100

If the distance out is 100' and down 2', what is the slope percentage?

2%

200

If the distance went out 25' and down 3', what is the slope percentage? 

12%

300

True or False. A slope of 4% is considered a Land capability class 1. 

False, that would be considered class 2

400

If the distance went out 10' and down 1.75', what would be the slope percentage? 

17.5%

500

If the distance went out 5' and went down 2". What is the slope percentage?

3.3333%

Horizons

100

True or False. The proper order for soil horizons is A, O, B, C and R.

False, O, A, B, C and R 

200

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

300

What is an example of something that could be present in the O horizon? 

former crop cover, small organisms, etc. 

400

What type of rock is common around here, usually a large and white in color.

Caleche 

500

The substance that creates the soil to turn red in color is a result of __________

Iron Oxide

Land classification/ Other

100

What is considered the worst land classification?

Class 8 

200

What is the best land capability class?

Class 1

300

Scenario: I am a farmer wanting to start growing potatoes. I am planning on farming in an area with a silty clay loam. What are some things to keep in mind while farming this area?

Soil type, amount of irrigation, slope, anything that would inhibit potatoes growing healthily. 

400

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.....

500

What type of irrigation is the FFA field?

Rill irrigation