The newest step of purchasing of American farmland is worrisome, just as the land grab in Africa was for commodities pricing internationally.
This is from 2016.
China produces less and less food every year because of their poor environmental management practices. One of the greatest concerns is the desert creep phenomenon occurring along the thousands of miles of tree line that separate farming from the deserts that make up a large part of China’s western and northwestern border. Attempts at taming the desert through the use of the “Great Green Wall of China,” a government planted tree system to hold back the aggressive grip of the desert, have all but failed. This failure barely slowed the desert creep which claims more than 3,400 km2 of farm land per year, roughly the size of the city of Atlanta. In grains, for example, Beijing has already conceded that for the foreseeable future, the Chinese grain consumption will greatly exceed its domestic production. Unless the Chinese begin investing in farms abroad, they will be completely dependent on foreign nations to supply them the gap in some of these foods.