114 



BULLETIN 624, U. S. DEPARTMENT OF AGRICULTURE. 



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and important. All the data show that it is very important to isolate 

 the strains of this variety and, for commercial purposes, to propagate 

 only the best of them. 



COMPARATIVE VALUE OF THE STRAINS. 



Any statement of the comparative value of the various strains 

 of the Valencia orange must be understood as applying only to 

 present conditions. What the future of some of these strains may be 

 under different cultural and market conditions no one can now say. 



Under existing con- 

 ditions, only one of 

 the twelve strains here 

 described is of com- 

 mercial value, though 

 three others are of 

 possible value to or- 

 ange growers. In 

 some cases the infe- 

 rior strains are not 

 only unproductive, 

 but the fruits pro- 

 duced by them are 

 poor in quality or un- 

 attractive in appear- 

 ance. 



From a commercial 

 standpoint the Valen- 

 cia strain is the most 

 valuable found so far 

 in these investiga- 

 tions. Some others, 



orange in the investigational performance-record plat during the Aftneciallv the Smooth 

 4-year period, 1912 to 1915, inclusive. -tr -n -i -vr i 



lellow, and JNavel 

 strains or selections from them, may prove desirable additions to the 

 present varieties of summer-ripening oranges. After the value of any 

 new strain has been determined, considerable time is required for its 

 introduction and trial in sections having different climatic and soil 

 conditions. This work of necessity is of a careful, experimental 

 nature, requiring several years to obtain reliable results. 



The remaining strains described in this bulletin are undesirable 

 in nearly every respect, as will be readily apparent from the records 

 and descriptions of them already presented. Since commercial 

 orange growing is conducted for the profit to be obtained thereby, 

 the further propagation of these inferior strains or their culture in 



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Fig. 7. — Diagram showing the relative number of variable fruits found 

 in the average total crops of trees of different strains of the Valencia 



