With the intensification of poultry production, the importance of sustainable management of poultry wastes (manure, litter, mortalities) has grown. Land application of poultry wastes is the most common method of use / disposal, and concerns over losses of nutrients and pathogens from application sites is driving the development of regulations. Liming of sewage sludge has been used for some time to kill pathogens prior to land application. It should be possible to use a similar process to treat poultry wastes to kill pathogens, stabilize phosphorus and capture ammonia. This study was conducted to evaluate CaO and Ca(OH)2 for killing pathogens and stabilizing phosphorus in broiler litter and layer manure, and to investigate the influence on soils following amendment with the treated wastes. Layer manure and broiler litter varying in moisture content were treated with CaO and Ca(OH)2 at rates of 2.5, 5, 10 and 15% by weight. All treated wastes were analyzed for plate counts, pH, and water soluble P (WSP), while a few selected layer manures were analyzed by XANES. A loamy sand and a silt loam were amended with broiler litter and layer manure treated with CaO at rates of 0, 2.5, 5, 10 and 15% and soil WSP and pH were measured at times 1, 8, and 29 d. Liming of the wastes was successful at reducing pathogens and stabilizing phosphorus, although the benefits varied between the treatments. The results of this study will be reported in detail and the implications for poultry waste management will be discussed.