WASHINGTON — The preliminary national average price received by farmers for all wheat in September was $6.02 per bu, up 58c, or 11%, from $5.44 in August and up $1.54 from $4.48 in September 2009, the U.S. Department of Agriculture said in its latest Agricultural Prices report.

The average price paid for winter wheat in September was $5.97, up 49c from $5.48 in August and up $1.77 from $4.20 in September 2009. The average price paid for durum was $5.01, up 58c from $4.43 in August and up 6c from $4.95 in September 2009. Spring wheat other than durum averaged $6.23, up 75c from $5.48 in August and up $1.38 from $4.85 in September 2009.

The average price paid for rough rice was $11.30 a cwt, unchanged from August but down $3.30 from the previous year.

The September index of prices received for food grains was 197 compared with the 1990-92 base of 100, up 9% from a revised 181 in August and up 23% from 160 in September 2009.

The September index for feed grains was 182, up 16% from 157 in August and up 27% from 143 a year earlier. The average price received for corn in September was $4.34, up 69c from $3.65 in August and up $1.09 from $3.25 in September 2009. Farmers received an average of $7.43 a cwt for grain sorghum in September, up $1.07 from $6.36 in August and up $1.80 from $5.63 in September 2009. The average price paid for oats in September was $2.16 a bu, up 7c from August and up 34c from $1.82 in September 2009.

The index of September prices received for oilseeds was 163, down 9% from 179 in August and 3% higher than 158 in September 2009. The national average price paid to farmers for soybeans was $9.94 a bu, down 16c from $10.10 in August but up 19c from $9.75 in September 2009.

The September index for dairy products was 132, up 3% from a revised 128 in August and up 32% from 100 in September 2009. The average price paid to farmers for manufacturing grade milk in September was $16.20 a cwt, up $1.10 from $15.10 in August and up $3.80 from $12.40 in September 2009.

The egg and poultry index was 149, unchanged from August but 16% above 129 in September 2009. The average price paid to farmers for all eggs was 64c a dozen, down 15c from 79c in August and down 10c from 74c in September 2009.