36. Which of the following is a measure of the amount of nutrients that can be easily extracted from the soil by plants?
a. Cation exchange capacity
b. Soil organic matter
c. Total nutrient content
d. Available nutrient content
37. Which of the following soil horizons is characterized by the presence of partially decomposed organic matter?
a. A horizon
b. B horizon
c. C horizon
d. O horizon
38. Which of the following is a measure of the degree to which soil particles stick together?
a. Texture
b. Structure
c. pH
d. Organic matter content
39. What is the term used to describe the process of adding organic matter to the soil?
a. Liming
b. Acidifying
c. Fertilizing
d. Amending
40. Which of the following nutrients is most likely to be deficient in a soil with a high pH?
a. Nitrogen
b. Phosphorus
c. Potassium
d. Iron
