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Introduction to Soil Chemistry Quiz #1

True/False
Indicate whether the statement is true or false.
 

 1. 

A fertile soil is not necessarily a productive soil.
 

 2. 

One of the functions of agricultural soils for plants is that the soil provides air to the plants roots.
 

 3. 

Decaying plant matter does not add nutrients back to the soil.
 

 4. 

The more clay we have in the soil, the more water it can hold.
 

Numeric Response
 

 5. 

On average, we say that a sample of soil is approximately _____% mineral matter.

 

 6. 

On average, we say that a sample of soil is approximately _______% organic matter.

 

Completion
Complete each statement.
 

 7. 

Macro pores are holes in the soil that mostly hold _____________.
 

 

 8. 

Micro pores are very small holes in the soil that mostly hold _______________.
 

 

 9. 

Soil organic matter contains many elements, with the main one being ___________, which makes up approximately 56% of SOM.
 

 

Short Answer
 

 10. 

Define Humus:

____________________________________________________________________

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