Two biofertilizer drums can look identical and differ 5x in live microbe count. Here are the exact FCO 1985 Schedule III minimums — 1,200 IP/gm for Mycorrhiza, 1.5x10⁸ CFU/ml total for liquid consortia — and how to work out your real cost per live microbe before you buy.

The short answer: apply 2 litres of liquid biofertilizer per acre through drip, in 200 litres of non-chlorinated water, in the evening or early morning — and never within 7 days of a soil-applied fungicide. This guide gives the exact fertigation dose, schedule and the five mistakes that destroy live microbes before they reach the root zone.