Feed water-soluble nutrients through a drip line with a Venturi fertilizer injector. Use the available pressure difference to draw solution from a stock tank.
How it fits your setup
Water speeding through the injector throat creates suction at the feed port, mixing fertilizer solution into the irrigation flow without a separate dosing motor. The injection rate depends on the pressure difference, main flow and selected injector size.
Choosing and using it
Compare the connection, suction capacity and motive flow of the exact option with your running system. A bypass may be needed to create the required pressure difference. Include backflow protection upstream and compatible filtration downstream, then measure the actual draw rate before applying fertilizer to crops.