This study dealt with minimizing the cost of removing specified amounts of litter by processing it, by transporting it from the watershed, or combination of both. It was conducted in three different scenarios. Scenario I analyzed the reduction of Oklahoma poultry litter with an assumption that no processing plant is established. A linear programming model was used to find optimum solution. Scenario II examined the combined alternatives of establishing processing plants and transporting some amount of Oklahoma litter out of the watershed. Mixed integer programming was used to find optimum...