According to the data shown in Table 4, in relation to the initial soil conditions, the SAR showed an increase in all cases. The lowest value was found for the T1 test, which received no topdressing, and was irrigated with water. The highest SAR was obtained in the T5 test (nitrified effluent without fertilization), and it was significantly different from the T2, T3, T4, and T6 tests. According to Rengasamy and Olsson (1991), attention should be paid to the toxicity caused by SAR when its value is above 3.0 meq0.5 L−0.5. Thus, despite the significant increase, the compromising SAR values have yet to be achieved; however, this parameter should be kept under constant review to prevent or remedy its impact to the soil.