While bees are necessary in every orchard 
to carry on the work of pollination, success¬ 
ful pollination can occur only where the dif¬ 
ferent varieties are set out with reference 
to the time of blossoming. Only certain 
varieties of apples will pollinize well to¬ 
gether. It is, therefore, obvious that their 
time of blosoming must be the same. In 
order to produce fruit, not only should the 
time of blossoming be the same, but the flow¬ 
ers of any one variety must be capable of 
either being fertilized by their own pollen 
or by the pollen of some closely related va¬ 
riety. We thus have those that are termed 
self-fertile (fertile to their own pollen) and 
those that are termed self-sterile (sterile to 
their own pollen). There are also varieties 
which are only partially self-sterile. Due, 
perhaps, to environmental conditions, the 
