12 
CoLOKADO Experiment Station 
This has led many to believe that the two names represent only a 
single variety. This is not the case as the Late Ohio produces a 
larger growth of vines differing in many respects from those of the 
Early Ohio, is later in maturing and produces a larger yield. 
SOURCE OF SEED 
With many of the varieties used in the variety test the seed was 
secured from two or more sources so that comparisons may be made 
which Avill show to some extent the relation of locality to quality of 
seed. The data bearing on this point are brot together in Table 5. 
In 1915 there were three comparisons between Colorado irrigated 
and Idaho seed in two of which larger yields were obtained from 
seed from the last named source. The averages are also slightly 
in favor of the Idaho seed tho the differences are so small that 
they may be regarded as within the limits of error. The Irish Cob- 
bler and Green Mountain varieties both produced larger yields from 
the Wisconsin seed than from that which was obtained from Minne- 
sota. These comparisons are, however, few in number and for only 
TABLE 5 
Yields from Seed Obtained from Different Sources. Summarized from Tables 
1, 2, 3 and 4. Bushels Per Acre, Field Weights. 
Source of seed 
Year ~ ~~ 
VARIETY of Colorado Colorado 
test dry land irrigated Idaho Minnesota Wiscoirsin New York 
Peoples 1915 320.9 295.6 
Green Mountain 1915 350.8 421.4 
Charles Downing 1915 254.4 281.9 
Irish Cobbler 1915 205.5 248.3 
Russet Burbank 1915 340.2 354.3 
Average 305.2 310.6 278.2 334.9 
Pearl 1915 359.7 262.3 352.7 
Pearl 1916 330.5 289.4 346.5 
Pearl 1917 431.0’ 366.8 415.5 
Pearl 1918 386.6 344.4 327.7 
Average of Pearl 377.0’ 315.7 360.6 
Rural New Yorker 1915 335.7 300.0 
Rural New Yorker 1916 293.8 332.2 
Rural New Yorker. . . . 1917 369.9 405.5 399.6 
Rural New Yorker 1918 261.8 298.2 288.1 
Average of Rural New Yorker, 1915-1918 315.3 334.0 
Average of Rural New Yorker, 1917-1918 315.9 351.9 343.9 
