Burbank's method involved the deliberate transferring of the pollen from the flower of one plant to the stigma of the flower of another plant.
(Burbank's method; involved; the deliberate transferring of the pollen from the flower of one plant to the stigma of the flower of another plant)
Burbank's method
involved
the deliberate transferring of the pollen from the flower of one plant to the stigma of the flower of another plant