I'm going to talk. I know just enough about it to be dangerous, so this needs to be clarified. Maybe Mr. Vandenberg could help me out.
I'm led to believe that one of the key genetic markers of getting other traits into alfalfa is this. The way that it's been designed in the past is that the Roundup Ready event has a marker to bring forward certain other traits that come with it. I could be talking out of school, but that's one option.
The second option, as I understand it, is just a new invasive species that is now starting to take hold on a lot of alfalfa production in North America. It wasn't there previously, so there is a need for some sort of weed control in, specifically, alfalfa. As with agriculture in the last thousands of years, when you till the soil, species find ways to adapt.