Question

Hydrometer is used in soil analysis to determine

• A. Soil moisture content
• B. Soil hydraulic conductivity
• C. Soil structure
• D. Soil texture

Hint:

Soil analysis instruments:
- Hydrometer: Soil texture (particle size).
- Tensiometer: Soil moisture tension.
- Permeameter: Hydraulic conductivity.

Answer 1

The Correct Option is D

Step 1: Understanding the Question:
This question tests knowledge of instruments used in soil analysis.

Step 2: Detailed Explanation:
A hydrometer is used in soil analysis to determine soil texture (D).
The hydrometer method (or Bouyoucos method) measures the density of soil suspension.
It is used to estimate the proportions of sand, silt, and clay.
Other options:
- Soil moisture content (A): Measured by the oven-drying method or tensiometer.
- Soil hydraulic conductivity (B): Measured by permeameter.
- Soil structure (C): Assessed visually.
Thus, the hydrometer is used for soil texture determination.

Step 3: Final Answer:
Thus, the hydrometer is used to determine soil texture, which corresponds to option (D).
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