Hi Tom, I currently use tarps but no BCS because we went completely no dig two years ago. I could bring one on site but it would be very tiring to move it between the various terraces. Maybe this is a stupid question but since the soil is very stony I think it is very oxygenated and therefore oxidized? in this case from what I understand a BCS would make the situation worse. I am following the redox course but I still have to connect all the points. Thank you