That scar is an artifact of a process called grafting, or fusing two separate pieces of wood into a new tree. From citrus to peaches, almost all fruit trees are grafted, and so are pecans. Some ...

An added benefit is that grafted fruit and nut trees will bloom and produce sooner than those propagated by seeds or cuttings. Besides propagation, grafting can provide a variety of other benefits.

Macadamia nut trees (Macadamia integrifolia ... Some English walnuts begin as grafted plants to black walnuts and can develop a problem known as "blackline." Blackline is a compatibility issue ...