Table 3 Frequency of Frankia clades occurring in clones derived
from Alnus tenuifolia rhizosphere soils in mid succession (densePopulus balsamifera forests) that were either unfertilized,
fertilized with N (NH4NO3), or
fertilized with P (P2O5). P-values in
bottom rows were derived from Fisher’s exact test conducted for pairwise
comparisons of a priori interest.