The U.S. corn production likely dropped 5.2 percent in the past week to its lowest level in six years and millions of U.S. corn acres may be abandoned due to the expanding drought, according to analysts polled by Reuters on Tuesday.

The survey of 11 analysts resulted in an average estimated corn yield of 130.8 bushels per acre, the lowest in 10 years and down 4.7 percent from a Reuters poll last week. That also is below the U.S. Department of Agriculture’s latest estimate of 146 bushels.

Corn production was expected at 11.45 billion bushels, down from the previous Reuters poll average of 12.077 billion and down almost 12 percent from the current USDA estimate.