Does Organic Agriculture produce less CO2?

From this article http://blogs.wsj.com/numbers/can-organic-farming-counteract-carbon-emissions-1373/

I found this "paper/advertisement" http://66.147.244.123/~rodalein/wp-content/uploads/2012/12/FSTbookletFINAL.pdf

I looked at the graph that shows conventional agriculture produce more N2O . Is that accurate? Also the manure production seems to not be counted at all and that doesn't seems correct. Does those allegations stands?