wheat是什么意思？

The trend began in 2007, when leading wheat-exporting countries such as Russia and Argentina limited or banned their exports, in hopes of increasing local food supplies and thereby bringing down domestic food prices.

In 1972, for instance, the Soviets, recognizing their poor harvest early, quietly cornered the world wheat market.

As water tables have fallen and irrigation wells have gone dry, China's wheat crop, the world's largest, has declined by 8% since it peaked at 123 million tons in 1997.

As a result, wheat prices elsewhere more than doubled, pulling rice and corn prices up with them.

Wheat production takes 50% of its energy input for these two items alone.

While 20 gallons of water are need to produce one pound of wheat.