Half-hour experiments with plants . ning, treecarpentry, soil and nourishment, and battling pests are alltaken up at length by Burbank in his works. As Burbank states in the foregoing excerpts regardingorchard rejuvenation, the grafting of good varieties offruit on the old and otherwise worthless stock is the keyto the entire situation. Because of this fact, we give in thefollowing pages, Burbanks statements of the general prin-ciples of grafting and the more common methods, whichwill afford a foundation for experiments that will provefascinating and profitable. In one county in Ohio, in a rec
Half-hour experiments with plants . ning, treecarpentry, soil and nourishment, and battling pests are alltaken up at length by Burbank in his works. As Burbank states in the foregoing excerpts regardingorchard rejuvenation, the grafting of good varieties offruit on the old and otherwise worthless stock is the keyto the entire situation. Because of this fact, we give in thefollowing pages, Burbanks statements of the general prin-ciples of grafting and the more common methods, whichwill afford a foundation for experiments that will provefascinating and profitable. In one county in Ohio, in a recent season, 117rejuvenated orchards added more than 50,000bushels to the apple crop. In several cases a netprofit of $400 per acre has been secured froman abandoned orchard. MORE THAN 500 KINDS ON ONE TREE The direct-color photograph on the oppositepage shows one of Burbanks cherry trees whichhas produced as high as 500 kinds of cherriesat the savie time—this for the purpose of con-venient comparison and intelligent selection, 10. Grafting Methods Tliat WiiiWork Miracles General Principles THE single principle that underlies all successful graft-ing, is that the layer of tissue called the cambiumlayer^ lying just beneath the bark of the twig^ shall bebrought in intimate contact with the corresponding layer oftissue of the stock on which it is grafted. The life-givingsap flows through this thin layer of tissue only. As to thecentral woody tissues—the so-called heart of the twig—there will be no union between stock and cion in any case. But this is of no consequence since the new growth ofwood soon covers the trivial wound with which the cambiumlayer will make ready union under favorable circumstances;and the growth will continue outward^ year by year^ untilultimately the cion and stock are so firmly joined that theyconstitute a branch as strong as the ungrafted branches ofthe tree. But unless the living tissues of the cambiumlayer are accurately joined^ no union can take p
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