Kinds of soil water

Soil water is basically three types....

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Irrigation Water Management

Gravitational water.

Water in the microspores that moves downward freely under the influence of gravity <1/³ bar) beyond the root zone is called gravitational water.

It is not available to plant.

Fig: gravitational water

Water retained by the soil in capillary pores

( micro pores), against gravity (-1/3 to - 31 bar) by the force of surface tension as continue film around soil particles is called capillary water.

It is available for plant growth.

Fig : capillary water

When water is held tightly as thin film around soil particles by adsorption force and no longer mover in capillary pore, is called hygroscopic water.

It flows at gravity of >-31 bar.

Fig: Hygroscopic water

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