DES MOINES, Iowa (AP) — The $850,000 Iowa taxpayers contributed to the World Food Prize Foundation last year was the biggest donation the group received. The Des Moines Register reports) that Iowa taxpayers accounted for nearly one-third of the foundation’s spending in 2011. Public support is growing for the foundation that recognizes achievements in agriculture and holds an annual symposium every October. But Iowa officials agree that the investment in the World Food Prize foundation has paid off because it has improved the reputation of the state.