Multiple Choice
The ill effects of acidity in subsoils can be ameliorated by adding gypsum (CaSO4-2H2O) to the soil surface. Which of the following most likely helps account for this effect?
A) The gypsum replaces hydrogen from colloids which moves down the profile and decreases the pH of the subsoil layers.
B) Calcium from the gypsum replaces hydrogen from colloids in the subsoil thereby increasing the soil pH.
C) Gypsum dissolves and leaches downward, increasing the Ca/Al ratio in the soil solution in subsoil layers.
D) Sulfate ions from the gypsum react with H ions in the subsoil to form H2SO4.
E) Gypsum stimulates root growth in the surface soil horizons.
Correct Answer:
Verified
Correct Answer:
Verified
Q1: The drainage of some coastal wetland soils
Q8: The drainage of certain wetlands has resulted
Q11: Sulfuric acid is sometimes added to irrigation
Q15: If you want to reclaim a saline
Q19: If you wanted to reduce the percentage
Q29: The acidity of "acid rain" can be
Q39: The degradation of irrigated soils across the
Q41: You were advised to use elemental sulfur
Q70: Which of the following does not describe
Q72: Which of the following would occur when