Finally, a research paper that compares Random Traffic Farming vs Low Ground Pressure vs Controlled Traffic Farming and includes 3 tillage systems, Deep Tillage to a depth of 250 mm, Shallow Tillage to a depth of 100 mm and Direct Drilling. Guess which system generates the highest yield?
http://beyondagronomy.com//cmsFiles/documents/document525c22c6c07fd.pdf
Source: Smith, E.K., Misiewicz, P.A., Chaney, K., White, D.R., Godwin, R.J., Harper Adams University, Newport, Shropshire, TF10 8NB, United Kingdom