I use a "DOSATRON" proportional injector to inject my EM brews into the irrigation water.  Pump pressure is just under 4 bar, and delivery is about 2 bar.  Irrigation is through micro sprayers, drippers and impact sprinklers.
 
I have found that dispensing these brews is the worst part - daily spraying with a knapsack sprayer is the most effective, but very time consuming.  Thus irrigation application is the most practical.
 
Stephen Barrow
 
 

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