Question

comparison between gravitational water, capillary water and hygroscopic water

Answer 1

Answer:

Gravitational water is a free moving water through soil by force of gravity it is largely found in the macropores of soil and very little gravitational water is available to plant as it drains rapidly down the water table in all except the most compact of soils

whereas

capillar water- water that remains in the soil after gravitational water is drained out,that is the subject of law of capillary of movement,and that is in the form a film around soil grains

whereas

hygroscopic water- water absorbed from atmosphere and held very tightly by the soil particles.The hygroscopic water is present as thin layer around the soil particles and water potential of hygroscopic water is very high on negative side

Answer 2

Comparison between gravitational water, capillary water and hygroscopic water

Explanation:

• Gravitational water : The amount of water in the soil that penetrates descending under the effect of gravity and influences the water table is called gravitational water. It is not available to the plants.
• Capillary water : The amount of water that is retained in minute interstitial spaces in the form of thin films surrounding the soil particles, is known as capillary water. The capillary water is the source of almost all the water that a plant absorbs from the soil, whereas the gravitational water is unavailable to plants.
• Hygroscopic water : Hygroscopic water occurs in the form of thin films around the colloidal soil particles. Hygroscopic Water retained even when whole of the capillary water is lost from the soil.

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