Lower agricultural prices hurt performance at the agricultural company.Shares of Archer-Daniels-Midland (ADM -3.25%) were heading lower today after the agricultural company missed top-line estimates in its first-quarter earnings report. It did beat profit expectations, but earnings still fell.As a result, the stock was down 3.3% as of 11:05 a.m. ET on Tuesday. Falling prices weigh on resultsAs a grain processor and trader, ADM is sensitive to commodity prices, and falling prices due to an increase in supply ...