John Deere fell 14% Friday, wiping out $15.7 billion after posting disappointing quarterly sales. The company said that supply chain issues will continue through the end of the year. Chip shortages and continuing issues with trucking and ocean shipments have forced the use of more expensive air freight to get key components delivered.

The interruptions are hindering sales just as US farmers are poised for another year of profit as war and global weather challenges have extended the 2021 crop price rally.

The supply issues add to the cost of fuel and fertilizer, weedkillers, insecticides and nitrogen fertilizer, all of which threaten the bottom lines of farmers even as prices for agricultural products are surging due to the unrest in Ukraine and poor crop yields this year.

Deere forecasted 2022 net income somewhere between $7 and $7.4 billion. The company also is suffering after  it halted its equipment shipments to Russia.