In this thesis, the first investigation into reclaimed water was on lemon trees (Chapter II). The aim of this work was to study the effects of reclaimed water on lemon tree performance. This research was to compare two sources of treated wastewater, one obtained with a secondary treatment (Cartagena) and the other with a tertiary treatment blending with well water (Campotejar), and to study their effects on soil chemical properties, on the leaf mineral status, crop production and fruit quality and safety.The main objectives of the second study were to evaluate the combined effects...