The Ill Effects of Acidity in Subsoils Can Be Ameliorated

question 34

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.

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Definitions:

Taste Preferences

The individual inclination or liking for specific flavors and types of food, which can be influenced by genetic, cultural, and environmental factors.

Basal Metabolic Rate

How quickly the body expends energy to sustain essential activities like respiration and blood circulation when at rest.

Settling Point

A theory suggesting that body weight is regulated at a predetermined, or preferred, level by a feedback control mechanism.

Set Point

A theory suggesting that the body regulates its weight and energy balance through internal controls, maintaining a stable weight over time.