Answer
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Hint: It is found as a microscopic film of water surrounding soil particles. This water is tightly bound to a soil particle by a molecular attraction so powerful that it cannot be removed by natural forces. This water can be eliminated via air drying or by plant retention, yet can't be taken out by gravity. With the help of the root, plants remove this water until the soil capillary force (force holding water to the particle) is equivalent to the extractive force of the plant root.
Complete answer:
The soil contains capillary, hygroscopic, and bound water at the field capacity. Due to the excessive water that exits or gets drained out from the soil after maximum absorption and runaway water is not associated with the field capacity. Capillary, hygroscopic and bound water is available in the soil so it tends to be remembered for field capacity.
Bound water is an incredibly thin layer of water encompassing mineral surfaces.
Hygroscopic water is the water that is tightly attached to the colloidal particle of the soil. It is inaccessible to the plants however present in the soil.
Against the pull of gravity, capillary water is held in the soil. Due to the cohesion force between the water molecules the water rises in the xylem.
Additional information: In the soil on the grounds, the capillary water is held and the surface tension properties (like cohesion and adhesion) of the soil micropores are very much stronger than the force of gravity. Hygroscopic water is present on the soil particles and not in the pores, specific kinds of soils with not many pores (clays for instance) will contain a higher percentage of it.
So, the correct answer is ‘Hygroscopic and capillary water’.
Note: When the soil dries out, the pore size increases and gravity starts to turn capillary water into gravitational water and it moves down. However, capillary water is the principal water that is accessible to plants as it is trapped in the soil solution directly close to the roots of the plant.
Complete answer:
The soil contains capillary, hygroscopic, and bound water at the field capacity. Due to the excessive water that exits or gets drained out from the soil after maximum absorption and runaway water is not associated with the field capacity. Capillary, hygroscopic and bound water is available in the soil so it tends to be remembered for field capacity.
![seo images](https://www.vedantu.com/question-sets/33989b27-d702-4311-b228-c9ce2f6da5d51496838005433010849.png)
Bound water is an incredibly thin layer of water encompassing mineral surfaces.
Hygroscopic water is the water that is tightly attached to the colloidal particle of the soil. It is inaccessible to the plants however present in the soil.
Against the pull of gravity, capillary water is held in the soil. Due to the cohesion force between the water molecules the water rises in the xylem.
Additional information: In the soil on the grounds, the capillary water is held and the surface tension properties (like cohesion and adhesion) of the soil micropores are very much stronger than the force of gravity. Hygroscopic water is present on the soil particles and not in the pores, specific kinds of soils with not many pores (clays for instance) will contain a higher percentage of it.
So, the correct answer is ‘Hygroscopic and capillary water’.
Note: When the soil dries out, the pore size increases and gravity starts to turn capillary water into gravitational water and it moves down. However, capillary water is the principal water that is accessible to plants as it is trapped in the soil solution directly close to the roots of the plant.
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