Treated Wastewater Irrigation of Tomato in Superabsorbent Polymer (SAP)-Amended Growing Media: Water Retention, Irrigation Performance, and Salinity Trade-Offs

This dataset contains the research data supporting the study entitled “Treated Wastewater Irrigation of Tomato in Superabsorbent Polymer (SAP)-Amended Growing Media: Water Retention, Irrigation Performance, and Salinity Trade-Offs.” It includes preliminary and main soil-moisture monitoring records, ambient temperature and relative-humidity measurements, raw gravimetric water-holding-capacity measurements, and a Python script for reproducing the irrigation-performance and WHC analyses. The treatments consisted of peat-sand growing media amended with 0%, 2%, 4%, and 6% (w/w, dry basis) sodium polyacrylate-based superabsorbent polymer, designated S1, S2, S3, and S4, respectively. During the main treatment-specific monitoring phase, irrigation events were identified from abrupt increases (≥5 percentage points) in the sensor-derived relative soil-moisture time series. Each irrigation event corresponded to a fixed application of 50 mL treated wastewater.