Out of my own business.
Plant enhancement products (PEP), aka biostimulants, have a natural or a synthetic origin. They contribute to a more intensive and effective agriculture, thus enabling the progresses required to continue feeding and clothing a still growing World population without other arable surfaces being available. However, the use of such products is discretionary, which means that they are not indispensable. This represents a considerable marketing challenge.
Here is why, as I explain in a recent Chinese publication.

.

You can download this document by clicking ⇓ here, on the arrow on the title bar.   Biostimulants A Marketing Challenge - AgroPages