Response of two forested Luvisolic soils to phosphorus fertilization was compared using chemical extractants known to be effective in removing certain soil phosphorus compounds. Fifteen months following fertilization application, the Mercoal series (Bisequa Luvisol) showed total phosphorus decreases in each of the soil horizons or layers sampled. To sampling depth, phosphorus concentrations in all but the NH4F extract (mainly aluminum phosphate) were lower in fertilized than in control samples. Vegetative uptake was considered to be mainly responsible for phosphorus decreases and movement, especially noticeable in the deeper mineral horizons. The Coalspur series (Orthic Luvisol) showed an appreciable phosphorus increase in the litter layer although both mineral horizons, Ae and Bt, exhibited losses. The Coalspur soil exhibited increases in soil phosphorus susceptible to all but the NH4F extractant. The data suggest a greater mobility and movement of soil phosphorus in these Luvisolic forest soils than usually observed in cultivated soils. Following fertilization, Mercoal probably had a greater number of phosphorus compounds (reaction products perhaps) more readily available than did the Coalspur.