mass and height growth, the greatest increase (174%) was on
the 46-cm water table, with the 92-cm water table second
(145%), and the fluctuating water table third (117%).
 Water table control by itself had no significant effect on fine
root production in the top 15 cm of the soil profile. This is in
marked contrast to the large increases in both height and above-
ground biomass associated with water table control.
 Total root biomass was significantly increased 58% by fer-
tilization (Tables 2, 4). As with above-ground biomass, the per-
centage increases by fertilization were in the order: fluctuating
water table, > 46-cm water table, > 92-cm water table. These
increases amounted to 93%, 62 C, and 35c%, respectively.
 Maintaining the water table at 46 and 92 cm increased total
root biomass by 69% and 43 C over that of the fluctuating water
table.
 Measurements of the taproots indicated that roots extended
downward in the soil profiles an average of 36 cm on fluctuating
water tables, 56 cm on 46-cm water tables, and 107 cm on 92-
cm water tables. It was apparent from these measurements and
field observations during excavations that the spodic horizon,
which typifies Leon soils, offered little resistance to root pene-
tration once water table levels are lowered and controlled.
 Lateral root extension was greater on the fluctuating water
table plots than on controlled water table plots. Several lateral
roots were found to extend 6 to 7 m on trees from the un-
controlled water table area. In general, the root systems of trees
on fluctuating water tables tended to be flat and shallow in de-
velopment, while root systems of trees on controlled water tables
developed downward in the soil profile.

Biomass Distribution
 Above-ground biomass distribution of the two species was
similar and is shown in Table 5. The increase in per cent dry
matter as branches for loblolly over slash pine is a reflection of
the extensive branching caused by early tip moth damage to the
loblolly pine. There was a decrease in bolebark per cent and a
corresponding increase in bolewood per cent with increase in
tree size.
 Biomass distribution of component parts of slash pine, in-
cluding the root systems, is presented in Table 6. Approximately
80c% of the biomass was in the above-ground portion with 2",
in root systems. Fertilization slightly decreased the percentage