Meanings of cleft grafting in английском

Prof. Smith: What is the superiority of that over plain cleft grafting?

Tongue grafting and cleft grafting is very successful.

There is whip grafting, and cleft grafting.

Branches of small diameter may be grafted by ordinary cleft grafting methods but branches of larger diameter should be treated by the bark slot method.

Cleft grafting is almost described by its name.

(Here Mr. McCoy makes a demonstration of cleft grafting.)