16. What is the term used to describe the vertical movement of water through the soil?
a. Percolation
b. Infiltration
c. Transpiration
d. Precipitation
Answer: a
17. Which of the following nutrients is most likely to be deficient in a sandy soil?
a. Nitrogen
b. Phosphorus
c. Potassium
d. Calcium
Answer: b
18. Which of the following is a common method of soil conservation?
a. Crop rotation
b. Overgrazing
c. Deforestation
d. Soil compaction
Answer: a
19. What is the term used to describe the process of water moving upward from a wet soil layer to a dry layer above it?
a. Leaching
b. Capillary rise
c. Evaporation
d. Transpiration
Answer: b
20. Which of the following is a measure of the acidity or alkalinity of soil?
a. Electrical conductivity
b. Total dissolved solids
c. pH
d. Carbonate hardness
Answer: c
