the stands. The constants, regression coefficients, correlation
coefficients, and standard errors are given in Table 16.
 Total element contents of the various tree components by
treatments are presented in Tables 17-24. The contents of ele-
ments in the tree components generally differed among the
treatments in the same order as did the biomass (Table 4).
 Using the fertilized slash pine of the 46-cm water table level
as an example, the distribution percentages of total element con-
tents among tree components are presented in Table 25. The
major portions of elements taken up were concentrated in the
above-ground biomass. An exception was that 43% of the total
Al content of 21.6 kg/ha was in the root systems. Fertilized
slash pines on the 46-cm water table accumulated a total of
578 kg/ha of elements.
 The total uptake of elements, expressed as kilograms per
hectare, for the two species is given in Table 26. Only the above-
ground components are included for loblolly pine. Plots fer-
tilized with 392 kg diammonium phosphate/ha received a total
of 83 and 90 kg/ha of N and P, respectively. The total uptake
data (Table 26) indicates that fertilization accounted for a max-
imum uptake of 89 and 12 kg/ha of N and P, respectively. Since
the root systems of trees on fertilized plots were larger than
those of unfertilized trees, the difference in uptake may be ex-
plained by exploitation of a larger volume of soil by fertilized
trees.
 The additional uptake of P in the fertilized plots as com-
pared to that in unfertilized plots represents only 13% of the
applied P. It is probable that much of the remaining P fer-
tilizer has leached from the active phosphate-absorbing root
zone, because Leon soil generally has little phosphorus absorp-
tion capacity in the surface 20 cm (5, 8). Total P analyses of
soil samples taken at 0-10, 10-20, and 20-30 cm depths at the
conclusion of the experiment indicated that on the average less
than 10 kg/ha of the applied P remains in the surface 20 cm
(Figure 2). The rapid loss of phosphorus fertilizer from the
A1 horizon would help explain the minimal fertilizer response
on plots where the foliar P values are near the deficient level.

 SUMMARY
 Both fertilization and water table control significantly in-
 creased height and biomass of slash and loblolly pines planted
 on a Leon soil. The effects of the treatments were additive. The
 growth response to fertilizer (392 kg diammonium phosphate/