Question

Original design of tensiometer was first proposed by

• A. Willard Gardner
• B. L. A. Richards
• C. B. E. Livingston
• D. Henry Darcy

Hint:

While Willard Gardner conceptualized and designed the first tensiometer, L. A. Richards is recognized for standardizing the design and introducing the porous plate apparatus for water retention curves.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
The tensiometer is an instrument used to measure soil water tension.
Understanding its history helps contextualize the development of soil water physics instruments in the early 20th century.

Step 2: Detailed Explanation:
- Willard Gardner (1922): First proposed and designed the tensiometer system using a porous cup connected to a vacuum gauge to measure the capillary potential of soil water.
- L. A. Richards (1930s): Refined Gardner's design, developed standard calibration methods, and popularized the instrument for commercial agriculture.
- B. E. Livingston (1908): Pioneered early work with porous clay cups to study transpiration, but did not design the closed-system tensiometer.
- Henry Darcy (1856): Formulated Darcy's law for water flow through saturated porous media.

Step 3: Final Answer:
The original design of the tensiometer was proposed by Willard Gardner.