In 1971, farmers spent $428 million for custom pesticide services in the United States; $154 million were spent on application and the rest for pesticide materials. About 98 percent of the expenditures for custom services were for crops and the remainder were for livestock and other farm uses. The largest expenditures for custom pesticide services were on corn and cotton, which together accounted for about 45 percent of the U.S. total for crops . The Pacific and Corn Belt regions accounted for over a third of the total for all crops. Farmers grossing over $40,000 spent about 60 percent of the total expenditures on crops. Average expenditures per farm ranged from under $450 for farmers grossing less than $20,000 to about $4,400 for those grossing $100,000 or more.