The water is available between the 15 atm and

Answer: Option A

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.