Question

Lysimeter is an instrument used to measure the following process(es):

• A. Evaporation
• B. Infiltration
• C. Evapotranspiration
• D. Deep percolation

Hint:

Lysimeters are effective tools for measuring both evapotranspiration and deep percolation. They help in studying the water balance in soils.

Answer 1

The Correct Option is C, D

A lysimeter is primarily used to measure evapotranspiration, which is the sum of evaporation from the soil and transpiration by plants. It is also used to measure deep percolation, which is the downward movement of water beyond the root zone.

• (A) Lysimeters do not solely measure evaporation; they measure evapotranspiration, which includes both evaporation and transpiration.
• (B) Lysimeters do not directly measure infiltration, which refers to water entering the soil from the surface.
• (C) Correct. Lysimeters are designed to measure evapotranspiration.
• (D) Correct. Lysimeters also measure deep percolation, the movement of water below the root zone.

Thus, the correct answers are (C) and (D).