Key Takeaways:

Diesel accounts for about 64 percent of U.S. farm fuel spending. For farmers, the pressing question is what a higher price adds to each field operation. Iowa farm diesel averaged $5.50/gallon in September, compared with the $2.89/gallon Iowa State assumed for its February machinery-cost survey. On the article’s illustrative 1,000-acre corn–soybean farm, the specified field operations use about 2,485 gallons. At $5.50 a gallon, their fuel bill is roughly $6,500 higher than at $2.89. This is an illustrative calculation using Iowa State’s gallons-per-acre estimates. A temporary diesel export embargo has supporters, but its effects remain contested. S&P Global’s models suggest that a complete ban woul...