Effect of tertiary treated wastewater on some soil properties and wheat yield

Water shortages in arid and semi-arid zones like Palestine, as anticipated, led to the search for new sources for agricultural use such as tertiary treated wastewater (TWW). The experiment was carried out during the seasons (2018-2019) at the Faculty of Agriculture and Veterinary Medicine, An-Najah National University, Palestine, to test the effect of tertiary treated urban wastewater efflu-ent irrigation on the soil, wheat growth and yield. Three local wheat landraces were used in the study. A split plot design with three replicates was used. After wheat harvest, soil chemical prop-erties, crop yield and growth were studied. No significant interaction was observed between the treatments and the varieties for the effect of TWW on growth and yield variables of the three wheat varieties. The concentration of all tested parameters on the soil was increased significantly by irri-gation with TWW. Significant reduction of total nitrogen was observed in the plant under TWW treatment, whereas no significant effect of TWW was reported on plant phosphorus (P), potassium (K), sodium (Na), calcium (Ca) and ash content. In order to avoid eventual risks, the use of TWW requires regular monitoring and the reuse standards must be respected