"There be three things which are too wonderful for me, yea, four which I know not: the way of an eagle in the air; the way of a serpent upon a rock; the way of a ship in the midst of the sea; and the way of a man with a maid."
–Proverbs 30:18-19, King James' Bible
By learning and adopting the use of the three-field system you can increase the effectiveness of any influence increasing fertilizer.
Three-field System provides a flat bonus to the Influence-gain for each use of a fertilizer. This bonus is equal to 1/5th of the base value of the Fertilizer.