Why is the volume of water drainage from soil an important factor in agriculture?
Increases drainage results in an increased drop in the amount of water in the soil available to plants. Saturation is when soil pores are filled with water. This drains rapidly due to gravity to a point called Field Capacity, which is the amount of water a soil can hold against gravity. As drainage continues, tension in the soil is increased (water levels drop), to the Wilting Point, which is the point that roots cannot ‘pull in’ enough water to maintain themselves. It goes further, but this is enough. This is affected by soil structure (pore size, % porosity, soil electromagnetism, etc.) That is a very crude scientific reasoning, the common reason: Drainage classes classify the rate of water drainage in a soil. The faster, or more efficiently, a soil type drains water, the faster the water travels below the rooting zone of the plants. This results in water not being available to the plants. On the other hand, water that cannot drain rapidly enough, results in too much water for the pl
