“…Table 7, it was found that the quantities of nutrients added to the soil in T 3 are greater than the crop requirements for P, Mg, Mn, Zn and Cu in the two cycles of cultivation, besides providing quantities exceeding 90% of the needs for N and Ca, greater than 70% of the requirements for K and greater than 50% of the requirements for Fe, in the two cultivation cycles. In the literature, there are several studies indicating the potential of TDE in providing significant amounts of organic matter and nutrients such as P, K, Ca and Mg to the soil, especially in soils with more clayey texture (Damasceno, Andrade, Gheyi, Dias, & Silva, 2011;Fortes et al, 2013;Alves, Santos, Kondo, Araújo, & Oliveira, 2018), and it may even meet 100% of the nutritional requirements of the cotton crop, thus replacing conventional fertilization, as reported by Sousa et al (2012). Thus, the use of treated domestic effluents plays a fundamental role in the planning and sustainable management of water resources, as it allows the sources of good quality water to be used for public supply and other priority uses (Lunardi & Rabaiolli, 2013).…”