THE SOFTWOODS 197 
also yields good timber at forty or fifty years of 
age, it is not so rapid in growth as the black 
poplars. Hence it is less suited than these for 
growth in highwoods; but, on the other hand, it 
is the best of all the poplars for coppice woods 
on suitable low-lying tracts, where it quickly pro- 
duces a remunerative crop. AAs it is less affected 
than the black poplars by the smoke of towns, 
this form of crop may prove highly profitable 
wherever there is any demand for match-wood. 
Like the common aspen, the abele throws up 
plentiful suckers, which indeed often render it 
a great nuisance in pasturage and meadow land; 
but slips or cuttings do not strike so readily as 
in the case of the black poplars. The latter are 
easily propagated by sets of the young wood put 
out in spring, which do best if they are placed 
for a year in the nursery. Such yearling cuttings 
of the Canadian poplar often grow to a height of 
four feet in the nursery, which shows its power 
of establishing itself and its early rapidity of 
growth. If rank growth of weeds were not to 
be feared, the cuttings could of course be best 
and most cheaply put in position at once in 
spring when cut from the parent tree. In this 
