Question

A thin film of water, held by the soil particles under the influence of internal attractive force is called which of the following

• A. Capillary water
• B. Combined water
• C. Hygroscopic water
• D. Gravitational water

Answer 1

The correct option is C Hygroscopic water

Capillary water is held in the soil by capillary forces in the pores of diameter 20mm or below. It does not fall down to water table due to gravity. It is the only water that is available to plants for their use.

Combined water is the water combined with chemicals and is not available to the plants.

Hygroscopic water is the very thin film of water that kept adsorbed by soil colloids. This water is not attractive to plants roots because this water is held by strong internal attractive forces.

Gravitational water goes down to water table due to gravity. This occurs after a good rain and the phenomena are called percolation.

So, the correct answer is option C.