导演：Matthew Roth
At the turn of the twentieth century, soybeans grew on so little of America’s land that nobody bothered to track the total. By the year 2000, they covered upward of 70 million acres, second only to corn, and had become the nation’s largest cash crop. How this little-known Chinese transplant, initially grown chiefly for forage, turned into a ubiquitous component of American farm...(展开全部)
