Plus, regularly-efficient farming can be greatly expanded. For example, a lot of former cropland in the United States' southern region (think former Confederat

Plus, regularly-efficient farming can be greatly expanded. For example, a lot of former cropland in the United States' southern region (think former Confederate states) was purposefully reforested after WWII because agricultural overproduction was one of the causes of the Great Depression. Basically, the United States produced more food than it could sell domestically, sell internationally, and give away. As another example, the organized high-latitude herding of reindeer is practically non-existent in North America, and I suspect in a similar position in Eurasia. Reindeer literally thrive on moss, breed like bunnies, and taste like filet mignon. Reversing just these two examples with today's normal farming know-how will produce substantially more food.