Fresh broiler litter will typically contain 20 to 30 lb plant available nitrogen per ton and 40 to 60 lb srus (as P2O5) and potassium or potash (as K2O) per ton. âIf the litter is stored,â said Walker, âsrus and potassium concentrations can increase by up to 30 percent after 12 months of storageFOR MORE DETAILS VIA WHATSSAPÂ