THE MONTUfiY liULLETlN. 



79 



water level is less than eight feet and where it is lia])le to rise and stand 

 for a month or two after tlie trees are planted. Alkali land also is not 

 suital)le for walnnts. Here the seleetion of roots makes a great ditfer- 

 enee with the nioistnre conditions. The English root is very fastidious 

 and will not stand too much moisture. The California Black will stand 

 more wliile the Eastern and the Royal IIyl)i'i(l — wliich is a cross ])etween 

 the California l^lack and the Eastern Black — will stand a great amount 

 of excessive moisture. 



ROOT STOCK. 



The selection of stock is just as important as varieties, soil, or any 

 other consideration. The stock we use for grafting purposes is the 

 Northern California Black, the Southern California Black, the Eastern 

 or American Black, the Royal Hybrid root, and the Paradox Hybrid, 



Fig. 33. — First year'.s growth of Eureka 

 grafted on first generation hybrid root, 

 sliowing where tree was cut off about 

 12 inclies above the ground wlien trans- 

 planted and new shoot tliat is to malie tlie 

 butt of the future tree. (Original.) 



which is a cross between the English walnut and the California Black. 

 The Southern Black makes a goocl root for the south, but my experience 

 with it in the northern part of the State, especially on heavy, moist soil, 

 is that it does not do well, the roots being very susceptible to moisture. 

 The Eastern or American Black is a good root, but it is too slow a 

 grower, taking many years to mature. The Northern California Black 

 makes a very fair root and it is on this root that most of the walnuts are 



