Tillage practices cause physical disturbances in soils. Tillage breaks up well-formed soil aggregates and forms compacted bare soil with poor infiltration rates that are susceptible to erosion. Tillage also mixes excess oxygen with organic matter (carbon) from the soil which results in carbon being lost from the soil and carbon dioxide being emitted to the atmosphere.
As stewards of the soil, it is our responsibility to limit soil disturbance, whether it be a chemical, biological, or physical disturbance. Instead of working against the soil and her friends (soil food web), lets rather work with them and they will reward us!
Fuhrer J. Soil Health: Principle 2 of 5 – Minimizing Soil Disturbance.