Complete the following sentences

…………………is unique because of its mix of properties and composition.

Colloids are ……………………………………………….

…………………… is a result of the alteration and integration of soil colloids.

Acid soils are ………………………………………………………….

A dark color usually indicates ………………………………………………

Soil texture, which determines ………………………………………………

The U.S. Department of Agriculture has developed……………………….. ………………………………………………

…………………...are low in organic content and have little agriculture value.

Highland soils…………………..are little developed and agriculturally worthless.

Ultisols represent the ultimate stage of………….. and soil formation ……………………….

3. Match the first column with the second.

Colloids are agriculturally worthless

Acid soils develop in cool, moist climates

Alkaline soils is the most obvious soil property

Color are characteristic of cold, moist climates

Sand is the coarsest measure of soil texture

Aridisols have little agriculture value

Spodosols are small soil particles

Highland soils are found in dry areas.

4. Answer the following questions:

What is the soil?

Why is any particular soil unique?

What are the colloids? Why do they have a great influence on soil?

What is the color?

What does a dark color indicate?

What does the soil texture determine?

What has the U.S. Department of Agriculture developed?

What are the aridisols?

What are the spodosols?

What are the tundra soils?

What are the highland soils?

What are the mollisols?

What are the alfisols?

5. Classify:

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