LUTHER BURBANK 



of splitting the stock. It is well to wax the parts 

 thoroughly, and it may be desirable to give full 

 protection from the drying effects of wind and 

 sun by placing a paper sack over the scion while 

 it is establishing its cellular bearings. 



It has been found advantageous by many Cali- 

 fornia orchardists to use the Burbank Royal wal- 

 nut which, as we have seen, is a hybrid between 

 the eastern and western black walnuts as a stock 

 on which to graft scions of the Persian walnut. 

 The Eoyal walnut has extraordinary capacity for 

 growth, as above explained, and its root imparts 

 something of its vigor to the scions engrafted on 

 its stem. 



Orchards thus established come early to bear- 

 ing, and prove far more productive, as a rule, 

 than those grown on the native roots of the 

 Persian walnut. 



As to the matter of early bearing, which is 

 obviously of great importance in the case of com- 

 mercial crop, Mr. Burbank has made experiments 

 with the walnuts that are almost as interesting 

 as his experiments with precocious chestnuts. He 

 has not been able to make the walnut bear in its 

 first season from seed, to be sure, but he has pro- 

 duced varieties that bear at the age of eighteen 

 months. In general the varieties of walnuts that 

 he has perfected tend to bear at an early age, and 

 his experiments show that it is possible to lessen 

 by several years the time of waiting for the seed- 

 ling to come to fruiting age. Here, as with other 

 qualities, there is great variation, and it is pos- 



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