Differentiate between capillary water, hydroscopic water and combined water.
(b) Which of the above types is drawn by the plants from the soil ?
(c ) Briefly describe rain water harvesting.

Explanation

(a) Capillary water . It is the water that moves through the small pore spaces of soil against the pull of gravity.
Hydroscopic water. The small amount of water that forms an extremely thin, tightly held film around the soil particles is termed as hydroscopic water.
Combined water. A small amount of soil water is chemically bond with soil particles. It is called combined water.
(b) Plants can draw only capillary water from the soil.
(c ) Refer to article 5.4.2., Page 234.