Well a big part of that is just efficiencies and stuff within factories. JD especially makes a LOT of equipment they ship all over the world. Those big ol' cotton pickers they make in Ankeny basically all get shipped to China.
50% of Deere's business is outside US/CA. They have some manufacturing in other countries but most of it is still made here, especially the big ticket items.
Volume wise most of Deere’s products are made outside the US. The high dollar large tractors and Combines and large engines are made here. But most of the high volume small/midsize tractors are produced outside the US. For engines, Mexico and France both produce more than are made in the US.