At Asia Times Online, Olivia Chung writes:

China has rung the alarm bell over potential threats to its grain security, scrapping export rebates and imposing tariffs and quotas on sales of its farm products overseas, after the fourth successive year that increased harvests have failed to meet demand.

The country's output of grain, including rice, wheat, corn and soybean, rose 3.5 million tons, or 0.7%, last year to more than 500 million tons, continuing a trend of improved harvests that has run since 2004, according to Ministry of Agriculture figures.

To read more:

http://www.atimes.com/atimes/China_Business/JB21Cb01.html