114 
BULLETIN 624, U. S. DEPARTMENT OF AGRICULTURE. 
<P S/V0077Y 57734/^7 
3.4\ 
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. 
^cwrorror^ cxoa Under existin g con " 
<xx&xw/vg/4SWM4Slf ditions, only one of 
• „_ the twelve strains here 
/wzz w/.f/vct4 S77&4//W described is ol com- 
75 vrnno* sr/w/A/ s*m 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, 
especially the Smooth, 
Yellow, and Navel 
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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50.3 
Fig. 7. — Diagram showing the relative number of variable fruits found 
in the average total crops of trees of different strains of the Valencia 
orange in the investigational performance-record plat during the 
4-year period, 1912 to 1915, inclusive. 
