Multiple choice

Hygroscopic water means

  1. the rain water which moves downwards in response to the force of gravity

  2. the portion of water which is free to move between the soil particles

  3. a very thin film of water seen around each soil particle

  4. the water available to the plants
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Hygroscopic water exists as a very thin molecular film around each soil particle, held so tightly by imbibition forces that plants cannot absorb it. Gravitational water drains freely. Capillary water is available water between soil particles. Available water refers to water plants can actually use.

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