The difference between the histories and political mechanisms of China and the USA is far more the reason for the success of their farmers than the quality of farmland. Today a political coup is ongoing not only in the USA but globally, and we are facing famine across the world as the Grand Solar Minimum begins to impact growing seasons. Political machinations force farmers to dump milk in the fields, leave crops unharvested, and prevent farm workers from doing their jobs.
China's population is too large for food and resources, resulting in famine, epidemics, and war, leading to population decline.
The proportion of arable land in China's territory is about 10 percent. On the other hand, American farmland is seven times larger and fertile than China. The United States has a much richer natural environment than China.
This breaks the ability of people to reason. This is why so many Americans seem to be complete idiots. They have been taught to have no capacity for logic, no experience with factual information, and misled to believe that 2+2=5.
If you folks reading this remain able to consider factual information and come to reasonable conclusions, examine the facts of food being dumped rather than provided for sale, seed sales to civilians - regardless of political theories and propaganda as to why - being banned by government, and the fact that in 2019 harvests of staple crops in the USA were half what they were in 2018, and the silence of your media sources on these facts, and act to make sure you will not be able to be prevented from eating good food.
I knew it for the first time. Thanks for your kind answer.