Soil water that is available for root absorption at field capacity is

The soil water that is available for root absorption at field capacity is called capillary water. Capillary water is the water that remains in the soil after the gravitational water has drained away. It is held in the small spaces between soil particles by capillary forces, which are the same forces that cause water to rise in a narrow tube. Capillary water is important for plant growth because it is held tightly to the soil particles, but is still available for plant roots to absorb. Hygroscopic water, on the other hand, is held too tightly to the soil particles for plant roots to absorb, while gravitational water drains away too quickly for roots to access. Superfluous water is water that is not absorbed by the soil and drains away due to excess water in the soil. So, in summary, capillary water is the water that is available for plant roots to absorb at field capacity, and it is held in the soil by capillary forces.