However, as in certain conditions is not possible to develop a profitable crop without benefit of irrigation is not possible under other conditions, agricultural development without the help of drainage and water management. Therefore, before proceeding it is prudent to point out the main advantages of this method: A. The use of this discharge allows aeration of the soil the roots of plants not only require the presence of water as a transport of soil nutrients, but also they need the air I breath gas exchange with the atmosphere . If the soil is completely saturated with water, air can not circulate through your pores and the roots can not perform their physiological functions. If the saturation is prolonged, the plants die. If temporary, the harvest decreases. Besides the lack of air in the soil affects the development of beneficial microorganisms that live there and are essential for the mobilization of nutrients that feed plants.
B. This modifies the physical drain soil aeration of the soil itself allows further development of plant roots in both the volume and length, which left empty to decompose the ground communicating with the layer below. The organisms that live in the soil they grow and they leave openings that communicate with each other. Moreover, drained soils are saturated with rain and then dried, resulting in shrinkage cracks, which facilitate the movement of water and air from the atmosphere. C. This helps drain the soil nitrification drainage promotes and enhances certain bacterial processes in soil that contribute to the decomposition of matter and the production of organic nitrogenous substances that serve as food for plants.