It depends on which sector of the agriculture you're talking about. The price of beef, chicken and pork will rise, because it's directly related to the corn and grain segment of the market.
Food like cereals will rise less because corn only accounts for about 12 cents a box, which means in light of the drought, would probably result in a price increase of 2 cents more than that. So 14 cents a box may be the input cost of corn.
You really have to almost go to each individual product to assess the impact, but overall, it's the price of meat we'll all see go up, but anything that uses corn as a sweetening agent will rise in price.
The question is how much corn input into a particular product is being utilized, and how the rise in price of corn will affect it.