Hi there I am new to the forum, this is my first post, I am currently looking at the above. I have a table of characteristics of the two substances and am wondering for things like organic carbon and TKN, can I just add the two values of each of the two substances to get a value for when they are mixed together in a ratio of 1:1? So TKN for cow manure is 2 g/kgwaste and for food waste is 13g/kgwaste so if I mix a kg of each my total TKN will be 7.5g/kg. I know this is quite simplistic but I'm just wondering if there would be any change due to combining the two substances? Many Thanks