Luther Burbank, the originator of the Burbank potato, in attempting to find a variety of apple suited to the climate of California, grafted more than five hundred kinds of apple scions on one tree, so that he might watch them side by side and find out which kind was best suited to that state.
If, instead of an apple tree, you were raising a plum or a peach tree, a form of propagation known as _budding_ would be better than grafting. Occasionally budding is also employed for apples, pears, cherries, oranges, and lemons. Budding is done in the following manner. A single bud is cut from the scion and is then inserted under the bark of a one-year-old peach seedling, so that the cambium of the bud and stock may grow together.
[Illustration: FIG. 69. HOW TO CUT A BUD FROM A SCION]
[Illustration: FIG. 70. THE STEPS IN BUDDING]
Cut scions of the kind of fruit tree you desire from a one-year-old twig of the same variety. Wrap them in a clean, moist cloth until you are ready to use them. Just before using cut the bud from the scion, as shown in Fig. 69. This bud is now ready to be inserted on the north side of the stock, just two or three inches above the ground. The north side is selected to avoid the sun. Now, as shown at _a_ in Fig. 70, make a cross and an up-and-down incision, or cut, on the stock; pull the bark back carefully, as shown in _B_; insert the bud _C_, as shown in _D_; then fold the bark back and wrap with yarn or raffia, as shown in _E_. As soon as the bud and branches have united, remove the wrapping to prevent its cutting the bark and cut the tree back close to the bud, as in Fig. 71, so as to force nourishment into the inserted bud.
[Illustration: FIG. 71. Sloping line shows where to cut tree]
Budding is done in the field without disturbing the tree as it stands in the ground. The best time to do budding is during the summer or fall months, when the bark is loose enough to allow the buds to be easily inserted.
Trees may be budded or grafted on one another only when they are nearly related. Thus the apple, crab-apple, hawthorn, and quince are all related closely enough to graft or bud on one another; the pear grows on some hawthorns, but not well on an apple; some chestnuts will unite with some kinds of oaks.