The utilization of manure as a nutrient source can be limited in sensitive watersheds. On the Delmarva Peninsula some soils are considered to be saturated by phosphorus (P), and may be restricted from any future P additions. An alternative use, such as energy production, must be implemented so manure does not become a liability. One manure to energy process is pyrolysis, of which biochar is a byproduct. Biochar has potential as both a fertilizer and carbon sequestration agent. We set up a ryegrass greenhouse experiment with biochar produced from five manure sources: dairy, beef, poultry, swine, and turkey. Ryegrass yield were generally similar whether biochar or chemical fertilizers were used. Therefore, biochars have the potential to still supply P for crop needs. Due to the lower weight of biochar compared to the initial feedstock manure, transportation costs can be cheaper, assisting in exporting the P from nutrient sensitive watersheds.