RESULTS AND DISCUSSION


 Mensurational data from the experiment are given in Table
1, and the significance of the differences is indicated in Table 2.


Height

 Fertilization alone significantly increased the height of both
slash and loblolly pines by an average of 12.5% and 17.3c%,
respectively, over all water table levels. However, response to
fertilizer was greatest on the uncontrolled water table, with the
second greatest response on the 46-cm water table. The per-
centage increases in height of fertilized trees over non-fertilized


 6
 slash Unfertilized

 Fertilized
 slash
 5




 4 ....---


 46 92 FLUCTUATING
 WATER TABLE DEPTH (CM)
 Figure 1.-The effects of fertilization on heights of slash and loblolly
pines grown on 46- and 92-cm and fluctuating water tables.