Foliar nitrogen concentrations at the midcrown position were found to vary with the season but not with the treatment for ponderosa pine forest areas subjected to a high fuel consumption (HFC) or a moderate fuel consumption (MFC) prescribed burn, or a no-burn control. Average midcrown foliar nitrogen concentrations were 1.01 percent in May prior to the onset of growth, fell to a low of 0.83 percent in June, and then rose to a season-end high of 1.15 percent in September. The HFC and the MFC prescribed burns produced losses of 20 percent and 4 percent of the needle mass, respectively. The total nitrogen content of the foliage at the end of growth in August was 81, 95, and 99 kilograms per hectare (kg/ha), and at the end of the sampling season in September it had reached 89, 105, and 108 kg/ha for the HFC, MFC, and control units, respectively.