As the dollar index rose 0.36 percent on reports of a plan to reduce Greece's debt, grain futures were sharply lower on Thursday on the Chicago Board of Trade.

Corn was off 9 1/4 to off 10, soybeans were off 16 1/4 to off 17 1/2, wheat was off 8 to off 9 1/4 and oats were off 7 to off 8 1/4.

As did an International Grains Council estimate that global corn planting would be 2 percent higher this year, the stronger dollar pushed corn prices lower Thursday.

On a report that Russia had sold up to 200,000 metric tons to Central and South American countries in recent days, wheat futures fell.

Soybean futures fell with selling by funds as several markets breached support levels. (With Inputs from Agencies)