In recent years the world grain output is about 2.0-2.2 billions tons, it reached 2.32 billions tons in 2011, China is the biggest production grain country which is 550 millions tons of grain, US is second with 500 millions tons of grain. Today the supply and demand in the world keeps a basic equilibrium. Policies about production grain between different countries have very big difference. The US since 2002 up to now produces wheat to be limited below 80 millions tons, Japan insures self-sufficiency in rice and milk. China insures 100% degree of self-sufficiency in rice, wheat and corn, import soybean to be not limited to insure over 95% degree of self-sufficiency in grain. Singapore don’t produce any grain and import all of food. Some of African countries depend on international almsgiving to solve their famine. The degrees of self-sufficiency in grain in the world main countries as following:
US?? France Germany British Japan Russia Brazil India
119% 130%??? 91%???? 74%???? 40% ﹥100% ﹥100% ﹥100%
China ??Singapore
﹤100%?? ?zero????????????????????? (to be proofread)
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