Water stagnation occurs when the amount of water in the soil exceeds the field capacity and saturates all the pores of the soil. If this situation persists for a long time stagnation occurs, because in practice the roots of the plants no longer have sufficient air available to carry out their functions and even come to rot. With the exception of hydrophilic plants, it is a phenomenon that damages plants by bringing them to death by radical asphyxiation or making them more susceptible to pathogens. An alternative to a progressive deterioration of the plant is seen as the mineral nutrition decreases or stops with consequent arrest of growth. The means of defense against water stagnation foresee on the one hand the correction of the ground starting conditions, so that it is no longer subject to stagnation, for example through the construction of an adequate water drainage system, secondly, when the stagnation occurs it is necessary to accelerate the drainage of excess water, for example through pumps or dewatering pumps.