1. Permeability of soil directly depends on _______

 Grain size

 Void ratio

 Degree of saturation

 All of these

2. Soil porosity is inversely related to _______

 Temperature

 Bulk density of soil

 Soil color

 Soil pH

3. In the Munsell system, hue “10” corresponds to _______-associate hue

 Red

 Yellow

 Black

 Gray

4. Soil structure plays a key role in _______

 Soil color

 Soil fertility

 Soil erosion

 Both soil fertility and erosion control

5. Soil physical properties significantly affected by management practices include _______

 Soil porosity

 Soil color

 Soil structure and porosity

 Soil structure

6. Addition of organic matter to soil generally _______ bulk density

 Increases

 Has no effect

 Decreases

 First increases and then decreases

7. The property that allows water to pass through soil pores is called _______

 Capillarity

 Permeability

 Consistency

 Porosity

8. Soil physical properties are influenced by _______

 Moisture conditions

 All of these

 Clay minerals

 Organic matter

9. Which factor has the least effect on soil permeability?

 Soil structure

 Pore size

 Soil color

 Texture

10. Plant-available water is held between _______

 Field capacity only

 Saturation and wilting point

 Hygroscopic coefficient only

 Field capacity and permanent wilting point

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