Pore space controls soil damage , drainage problems often arise from lack of large sized pore. Roots must have oxygen to survive and root activity shuts down in waterlogged soils , plants that are growing on wet shall soils are typically shallow rooted. Subsurface or tile drainage removes excess of the water from the soil water that actually prevents the air and oxygen from getting to the plants roots. Without artificial drainage , the plants have difficulty establishing a healthy root system on poorly drained soils. A simple way to test evaluated soil drainage is to dig a hole about 10-12 inches deep , then fill it with water. If the water fails to start draining in 30 mina the soil has a drainage problem. If the hole fails to be drained in 24 hours the waterlogged soils may affect the plant growth.