Since late 1800 synthetic fertilisers are being used by agriculture. Basically, these fertilisers are combinations of salts providing a limited range of nutritive elements to plants.
As research has shown, there is a limit to what crops can take-up and use in terms of nutrients. This means that applying more and more of a nutrient will not further increase production but instead will accelerate the deterioration of soils and the environment.
For several reasons we need a new way of thinking based on scientific insights in the interaction between environment, crops, soils and management.