Step 1: Understanding the Concept:
Saline-alkali soils have specific characteristics.
They are defined by pH, EC, and ESP.
Step 2: Key Formula or Approach:
No specific formula.
Need to know the characteristics of saline-alkali soils.
Step 3: Detailed Explanation:
Saline-alkali soils have:
- pH > 8.5 (A is correct).
- EC > 4 dS/m (C is correct).
- ESP > 15 (E is correct).
pH < 8.5 is for saline soils.
EC < 4 dS/m is for normal soils.
Thus, A, C, and E are correct.
Step 4: Final Answer:
The correct characteristics are A, C, and E.
Hence, the correct option is (D).