Thanks Sruthi, for this information and question. Welcome to Collab!
I hope others on the list who are in a better position to respond about the breakdown of acreage devoted to millet for various purposes will do so. In the meantime, I'd note that in a post to this list last September, Gary Weitgrefe discussed some statistics, including that 86.8% of the proso millet grown in the three-state area of Colorado, Nebraska, and South Dakota (major producers) is harvested for grain.* That grain might go for different purposes, including birdseed, feed for poultry or hogs(?), and human food. I don't have a breakdown of that Presumably the other 13.2% includes proso that goes for forage / hay.
Sorghum and teff, which may be included among the millets, are similarly grown for grain or forage. I have no breakdowns.
All other millets - including pearl, foxtail, and Japanese/barnyard - are grown only for animal consumption, even in the rare cases they are harvested for grain. I understand that browntop millet is sown only for wildlife.
Others please correct me on any of the above, and/or expand on it.
It will be very interesting to know more about your study, Sruthi, including which millets were used. Please keep us informed as the work progresses.
Thanks again and best of luck with your studies!
Don
Don Osborn, PhD
(East Lansing, MI, US)
North American Millets Alliance