LUTHER BURBANK 
1853. The best manner of its cultivation, however, 
was not well understood, and the greater ease and 
certainty with which the walnut can be grown has 
led to the abandonment in recent years of many 
of the almond orchards. 
Nevertheless the crop is one of considerable 
importance, as the figures just given show. 
The total number of Persian or English walnut 
trees in bearing in 1910 numbered 914,270, of 
which all but about sixty thousand are in Cali- 
fornia. The rapid increase of the industry, and its 
prospect of still greater increase in the near future, 
is shown in the fact that the number of young 
trees, not yet of bearing age, was reported in 1910 
as 806,413. 
The extension of the industry is shown also in 
the fact that of the trees not yet in bearing no 
fewer than 177,004 are in the single state of Ore- 
gon, and 5,513 in Mississippi. These figures fore- 
cast the spread of industry to meet the growing 
demand for walnuts in America. 
The total production of Persian walnuts in 1909 
was 22,026,524 pounds, with a valuation of 
$2,297,336. 
It will thus be seen that the walnut takes rank 
as a commercial crop of genuine importance. The 
value of the crop approaches that of the total crop 
of apricots, although not as yet approaching the 
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