Question

Evapotranspiration is measured by

• A. Anemometer
• B. Piezometer
• C. Lysimeter
• D. Hydrometer

Hint:

Evapotranspiration measurement:
- Lysimeter: Direct measurement.
- Other methods: Penman-Monteith, Blaney-Criddle (estimates).
- Lysimeters are used in research and field studies.

Answer 1

The Correct Option is C

Step 1: Understanding the Question:
This question tests knowledge of instruments used to measure evapotranspiration.

Step 2: Detailed Explanation:
Evapotranspiration is measured by a lysimeter (C).
A lysimeter is a device that measures the amount of water lost from soil by evaporation and transpiration.
It consists of a container filled with soil and vegetation, and water loss is measured by weighing or measuring drainage.
Other instruments:
- Anemometer (A): Measures wind speed.
- Piezometer (B): Measures groundwater level.
- Hydrometer (D): Measures soil texture or specific gravity.
Thus, the lysimeter is used for evapotranspiration measurement.

Step 3: Final Answer:
Thus, evapotranspiration is measured by a lysimeter, which corresponds to option (C).
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