This is a link to a recent presentation I gave on our high yield Barley 180 project sponsored by ACIDF, ARECA and ABC. It outlines the plant densities, nitrogen, plant growth regulators and fungicides used to achieve 140-157 bu/ac barley. 

http://beyondagronomy.com//cmsFiles/documents/document54e7d29deb8fa.pdf

Thanks to my colleague Craig Shand from Chinook Agronomics for sharing his data and to the rest of our cooperators who gave us a chance to learn some excellent agronomic strategies.