There were also some gorgeous images showing real hotspots in C processing around roots, and plenty of modelling and including microbial populations in modelling. Carlos Sierra gave an excellent little workshop on SoilR, which is an R package which includes many common models like RothC or Century (as well as dozens of models people have published and added) as R functions. There are also basic one-pool or two-pool functions which you can adapt to your data. This seems like a fantastic tool which is very accessible.
I got good responses to my poster and enjoyed talking about my work to people who think about SOM all the time. There was other work presented at the conference (Rota Wagai, in particular) showing that C associated with the mineral fraction is very young, and I used that to explain my positive correlation between stilt and clay SOM and yield. The paradigm of mineral association being the oldest, strongest association seems to be shifting. In general my work was more applied than most of the other work presented there. Though I found the theoretical work exciting I was also satisified to represent an agricultural, applied context.