The CP with cover crops had more SOC stock in the surface layer than MP plots with cover crops in 2012
apparently due to better mixing of the residue into the surface layer of the MP treatment. SOC stocks in the
whole soil changed 8%, −4%, and 14% in the NT, CP and MP systems without cover crops when compared with
the 2000 pre-treatment baseline levels so there was SOC sequestration in the NT and MP root zones. With the
addition of cover crops to all treatments, the SOC stock gains were 30%, 10%, and 18% respectively. Twelve
years of cover crops were effective in restoring and sequestrating SOC for all treatments.