Yep, Deere has had versions of it for a while. 

Here's a quote from the site. Basically taking some cotton yield bale data and applying to hay equipment 

"Integrated-sensor measurements for weight and moisture provide bale characteristics (moisture/weight). This technology enables producers to document bale moisture and weight and take data into Operations Center for post-harvest analysis. This allows better management decisions around water and nutrients, plus document that information to get higher prices for their bales, as well as possibly reduce their input costs."