Design Blueprint: Fertilizer-Draw Irrigation Unit — Build Specification Derived from the Fertilizer-Draw Design in the Forward Osmosis Regeneration-Bound Paper

DESIGN BLUEPRINT — SIMULATED, NOT MEASURED — NOT BUILT. Build specification for a fertilizer-draw forward osmosis irrigation unit derived from the source paper https://doi.org/10.5281/zenodo.24109346. The unit uses 1,484 m2 of membrane to deliver 50 m3/day of diluted fertilizer draw from 2.0 g/L brackish groundwater at 0.50 recovery, with no draw regeneration step; draw regeneration and seawater duty are explicitly excluded by the source paper's regeneration bound. Operated nitrogen-matched, the unit is the complete fertilizer source for 32.8 ha of medium-demand crops while supplying 3.1% of their water. Includes dimensions and layout, bill of materials, assembly sequence, operating envelope, tolerances tied to the source figures, failure modes, and a maintenance schedule. All figures are computed, not measured.