You've got a valid point, but I'd have to expand that timeframe well back into the 19th Century as well, and even earlier, although to a much lesser degree. The government paid for the development of new types of ships, guns, and other tools of war, as well as the means to produce those tools of war. I'd be very surprised if the underlying metallurgy and mechanical design concepts needed to create many of those better farming implements and techniques didn't benefit or even derive from better ways of producing swords, armor, or other military hardware. It's certainly not an "across the board" kind of thing, but I'm pretty sure that it had some impact even in antiquity, where the state or ruler paid to have something made or improved, or some individual with an idea went to the king or ruling council to get funds to build or improve it. Ideas with military applications probably got priority over things that "merely" improved the lives of the peasantry, especially in wartime.