[amp_mcq option1=”Capillary tension in soil” option2=”Porosity of soil” option3=”Both (A) and (B)” option4=”Neither (A) nor (B)” correct=”option3″]
The correct answer is C. Both (A) and (B).
Field capacity is the amount of water that a soil can hold against gravity. It is determined by the soil’s porosity and the capillary tension of the soil. Porosity is the amount of empty space in a soil, and capillary tension is the force that draws water up through the soil. The higher the porosity and the lower the capillary tension, the higher the field capacity of the soil.
A soil with high porosity has a lot of empty space, which allows water to move through the soil easily. This means that the soil can hold more water before it reaches field capacity. A soil with low porosity has less empty space, which makes it more difficult for water to move through the soil. This means that the soil can hold less water before it reaches field capacity.
Capillary tension is the force that draws water up through the soil. The higher the capillary tension, the more difficult it is for water to move up through the soil. This means that the soil can hold less water before it reaches field capacity.
Therefore, the field capacity of a soil depends on both the soil’s porosity and the capillary tension of the soil.