The obtained results thus demonstrated the effectiveness of the SAP in view of application in
open-field cultivations. In this regard, it is worth emphasizing that the considered types of plants need substantial amount of water, and that a 50%-reduction of water (to the plants with SAP) was anintentionally critical condition to demonstrate the beneficial effect of the SAP. This is particularly true considering that this experiment was carried out in summer, inside a greenhouse, in harsh environmental conditions (the temperature often exceeded 45 ◦C).