Yellow corn,most commonly used for animal feed and corn starch, was found to be the largest volume export of the product categories, accounting for 35 percent in 2011. Soybeans, crushed for meal and oil, accounted for 13 percent, while hard wheat used for human consumption and grain sorghum used for animal feeding accounted for 10 percent.

U.S. exports of grain, oilseed and related products to Mexico averaged 22.2 million metric tons per year from 2008-2012 with an average annual value of $7.3 billion
“Together, these top four products accounted for 68 percent of the volume of U.S. grain and oilseeds exports to Mexico,” Rosson said. “Yellow corn also dominated export values to Mexico with 29 percent during 2011, followed by soybeans at 20 percent, hard wheat at 10 percent and sorghum at 8 percent.“
Dried distillers grains, high fructose corn syrup and soybean meal were all relatively recent introductions to the Mexico market, according to the report.
“Exports of these products, which include soft wheat and rice, grew more than 500 percent since 2000. In total, 14 product categories are covered in this report in various degrees of detail based upon the availability of data,” Rosson said.
The report stated rail was the main mode of transport for U.S. grains, oilseeds and products entering Mexico, accounting for 14.8 metric tons. The border town of Nuevo Progresoin Tamaulipas was noted as the only major port of entry without rail access.
Seaports are the second most dominant mode of entry for U.S. agricultural exports to Mexico and account for 8.11 million metric tons, according to the report. Approximately 42 percent of these imports leave the seaport area via rail, while at least 17 percent leave via truck.
Source:agrilife.org