1. Which soil fraction contributes most to cation exchange capacity (CEC)?

 Sand

 Clay

 Gravel

 Silt

2. Which of the following decreases bulk density?

 Deep plowing

 High sand content

 High organic matter content

 Compaction

3. Pore size distribution refers to the _______

 Density of soil particles

 Relative proportion of different pore sizes 

 Total volume of pores

 Chemical composition of pores

4. Soil porosity refers to ___________________

 Water content only

 Volume of pore spaces

 Volume of solid particles

 Organic matter fraction

5. Which soil particle has the largest size?

 Loam

 Clay

 Sand

 Silt

6. Soil tilth is best defined as the _______

 Mineralogical composition of soil

 Biological diversity of soil

 Physical condition of soil in relation to plant growth

 Chemical composition of soil

7. Which soil type retains the least water after drainage?

 Silt soil

 Sandy soil

 Loam soil

 Clay soil

8. Which soil property most strongly controls water-holding capacity?

 Soil temperature

 Soil texture

 Soil density

 Soil structure

9. Which of the following is NOT a physical property of soil?

 Porosity

 Texture

 Structure

 pH

10. Soil separates are classified primarily based on _______ ____________

 Bulk density

 Particle size

 Mineralogical composition

 Chemical reactivity

 Loading …

Question 1 of 10