The addition of the waste paper product had little effect on STP, i.e., Bray1-P and DRP concentrations were not significantly (P < 0.05) changed by waste paper product additions. The results also demonstrate that the incorporation of the waste paper product significantly decreased soil bulk density and increased total soil C 1 yr after incorporation (Fig. 1 and 2, Table 2). The effects of waste paper rates on soil bulk density and total soil C was less 2 yr after application (Fig. 3 and 4, Table 3). The decrease in total soil C with time was presumably due to mineralization of the added C. Decreases in soil bulk density were associated with increased total soil C (Fig. 1 –4), suggesting that changes in total soil C were, at least partially, responsible for changes in bulk density. The results support the hypothesis that decreases in P in runoff from simulated rainfalls after waste paper incorporation (Livingston et al., 2002) are due primarily to changes in soil bulk density and total soil C, rather than changes in the chemistry of soil P.