Subtopic: Measurement of infiltration, soil moisture and irrigation water infiltration
Question Statement:
Lysimeter is an instrument used to measure the following process(es):
Options:
(A) Evaporation
(B) Infiltration
(C) Evapotranspiration
(D) Deep percolation
Official Answer Key:
C, D
Step-by-Step Solution & Explanation
A lysimeter is an isolated soil-plant block/tank in which the water balance (inflow, storage change, and outflow) is monitored; it directly measures evapotranspiration and the deep percolation (drainage) leaving the root zone. It does not directly measure bare-soil evaporation alone or infiltration as separate processes.
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