Soil is the great neglected element of conventional agronomy. Look at the difference in richness between conventional and organic soil.

The soil of our vegetable garden is the central element. We can know its composition with analyses like this one (Pfaiffer chromatography) where it is separated into its different components. Here we see a soil of traditional agronomy (a) that only retains the compacted mineral part, while (b) organic agriculture has an aerated soil, rich in active microorganisms and organic matter.