Knowing the level of ground water is required to clearly define the drainage problem and to
ensure irrigation and fertilization processes can be carried without causing pollution and waste.
Depending on the ground water level, moisture increases with the capillarity movement from the
ground water to soil profile. This saturation in soil leads plants to be without oxygen, which
leads plants to dry. Therefore, the condition of soil will require drainage.
In the classical drainage concept, if the plant is not able to be deeper than
the root zone, than it is attempted to drain excessive water from the roots.