Managing Livestock Manure to Protect Groundwater

Groundwater is the source of drinking water for the majority of Washington state's population, so groundwater quality must be protected from contamination. Livestock wastes, a potential source of water contamination, can be an asset if properly handled and used. Spread on land, manure recovers nutrients and improves soil fertility and quality. In addition, land application is often the most economical method for disposing of manure. This guide describes and diagrams the nutrient cycle and defines related terms. It also lists best management practices and important tips for nutrient management. A table lists the nitrogen, phosphorus, and potassium content in dairy, beef, swine, sheep, horse, layer, and broiler manure. 8 pages