The water is available between the 15 atm and

Solution (By Examveda Team)

Soil moisture is defined as force per unit area that must be exerted to extract water from the soil. Soil moisture tension is usually expressed in terms of atmosphere.
For a given soil, soil moisture tension is inversely proportional to water content in the soil.
In soil, water is available between the 15 atm and $$\frac{1}{3}$$ atm.