Now Minnesota is poised to roll out its first-ever strategy to protect drinking water from the farm fertilizers that carry nitrates — one of Minnesota's worst pollution problems. The contradiction between supporting farmers and protecting water may be inevitable in a state where agriculture contributes $19 billion annually to the economy. Every year, farmers plant 16 million acres with corn and soybeans, using close to 800,000 tons of fertilizer. State officials acknowledge that some of it is still going to leach into water even if farmers follow the Agriculture Department's new rules and all the best guidance to prevent it. Bruce Montgomery, the scientist who helped develop the department's new strategy, said the proposed rule will generate a shared responsibility for water quality, through the creation of local agricultural committees that will educate farmers on best ways to reduce the impact of nitrogen.