The soil without remineralizing, falls into a downward spiral where every cycle, one crop after another sees a gradual, sad depletion of the minerals in the soil; so vital to good health. In general, our conventional agricultural practices are simply mining the soil and simultaneously damaging our health.  In the western world we've been doing that for over one hundred years now – agriculture is in crisis and our health system is beginning to buckle under the weight of a sickened populous. Here are some resources that speak to the topic:

The best examples in modern days of the benefits of rock dusts in an agricultural system are the Hunza people of North Pakistan. To find out more on the remineralizing soils, you can check out this dedicated website http://remineralize.org/

Reading the afore mentioned pdf books will give you a broad appreciation of the topic of remineralization and why a crucial part of Vital Veggies super soil is igneous rock dust.