The bans were announced to combat rising food costs.

Corn was up 12 to up 14 3/4; soybeans were up 7 1/2 to up 13 12; wheat was off 1/4 to up 1; oats were up 7 to up 8.

Corn traded higher as traders kept an eye on corn planting weather and bio-fuel critics have begun to complain about diverting corn to non-food uses. Wheat broke late on improved weather in the hard red crop. Soybeans rode higher on news that China and India would soon be buying soy oil.

The prices:

Corn: May 6.06. up 14 1/4; Jul 6.19 1/2, up 14 3/4; Sep 6.26 1/2, up 14 1/4; Dec 6.25 1/4, up 12.

Soybeans: May 13.80, up 7 1/2; Jul 13.97, up 7 3/4; Aug 13.85, up 7 3/4, Sep 13.49, up 13 1/2.

Wheat: May 8.95 3/4, off 1/4; Jul 9.10 1/2, unchanged; Sep 9.24 1/2, up 1/2; Dec 9.40, up 1.

Oats: May 3.93, up 7; Jul 4.03 1/2, up 7; Sep 4.15, up 7; Dec 4.29, up 8.