Question

Which one of the following soils is characterized by the presence of excess soluble salts but with pH < 8.5?

• A. Saline soil
• B. Sodic soil
• C. Acid soil
• D. Acid sulfate soil

Hint:

Salt-affected soils:
- Saline: pH < 8.5, excess soluble salts.
- Sodic: pH > 8.5, high sodium.
- Saline-sodic: pH > 8.5, excess salts and sodium.

Answer 1

The Correct Option is A

Step 1: Understanding the Question:
This question tests knowledge of soil classification based on salt content and pH.

Step 2: Detailed Explanation:
Saline soils (A) are characterized by the presence of excess soluble salts but have a pH < 8.5.
They contain high concentrations of neutral salts (e.g., NaCl, CaCl$_2$).
Sodic soils (B) have pH > 8.5 and high sodium content.
Acid soils (C) have pH < 6.5.
Acid sulfate soils (D) contain sulfuric acid (pH < 4).
Thus, saline soils have excess soluble salts with pH < 8.5.

Step 3: Final Answer:
Thus, saline soils are characterized by excess soluble salts with pH < 8.5, which corresponds to option (A).
[0.5cm]