GATE 2024 AG – Question 22

Irrigation and Drainage Engineering · Soil-Water-Plant Relationship · 1 mark · Multiple select

Which measure in-situ volumetric soil moisture? Select all that apply.

Neutron probe
Tensiometer
Time-domain reflectometry
Piezometer

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Show answer and explanation

Correct answer: (A) Neutron probe; (C) Time-domain reflectometry

Explanation

A neutron probe relates neutron moderation to hydrogen/water content after calibration. TDR infers moisture from dielectric response. A tensiometer measures matric potential and a piezometer measures hydraulic head, not volumetric content directly. Thus **A, C**.

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