180 UNIVERSITY OF CALIFORNIA EXPERIMENT STATION. 



either with the same variety as that of the permanent planting, or with 

 another more precocious, though ultimately less desirable, variety. 

 Such interplanting with walnuts may be done either in one or both direc- 

 tions, so that there may be two, three, or four times as many trees per 



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Diagram, showing method of quadruple-planting of walnuts in squares, (^perma- 

 nent trees, 60 feet apart. Irrtrees for first cutting out. 2=second cutting. 3=third 

 cutting. 



acre as will remain permanently, according to the extent to which the 

 interplanting is done. The only objection to such interplanting as this 

 lies in the reluctance of the average man to cut out the temporary trees 



