Two-hundred million farming households in China are struggling to capitalize on their nation's breathtaking economic development. While city dwellers are enjoying fast-rising living standards, much of rural China remains a hardscrabble landscape where average incomes of about $3,200 a year are less than a third of what they are in urban areas. "No one is going to get rich off farming," said Scott Rozelle, an expert on China's rural economy at Stanford University. "It's not going to happen until farm sizes get bigger. That's why millions of people are moving to the cities."