for fertigation, the rates of use may vary according to the feeding program in the range from 1 to 10 kg/ha/day; concentration of working solution for fertigation: closed soil – 0.01–0.05 (0.1–0.5 kg / 1000 l of water); open ground – 0.01–0.1 (0.1–1 kg/1000 l of water).