<P> China is the world 's largest producer of rice , and the crop makes up a little less than half of the country 's total grain output . China accounts for 30 % of all world rice production . In a given year total rice output came from four different crops . The early rice crop grows primarily in provinces along the Yangtze River and in provinces in the south ; it is planted in February to April and harvested in June and July and contributes about 34 percent to total rice output . Intermediate and single - crop late rice grows in the southwest and along the Yangtze ; it is planted in March to June and harvested in October and November and also contributed about 34 percent to total rice output in the 1980s . Double - crop late rice , planted after the early crop is reaped , is harvested in October to November and adds about 25 percent to total rice production . Rice grown in the north is planted from April to June and harvested from September to October ; it contributes about 7 percent to total production . </P>
which two regions grow most of china 's rice
provinces along the Yangtze River provinces in the south