24 
The Colorado Experiment Station 
The varieties used in our experiments were all spring wheats. 
Defiance, a variety originated at this station thirty-odd years ago; 
Red Fife, seed obtained from South Dakota Experiment Station; 
Kubanka, seed also- obtained from South Dakota Experiment 
Station. 
In 1913 the plots were all 1 sowed on 25 and 26 of April. The 
Fife was harvested on 6 August, 103 days from planting. The 
Kubanka was harvested 13 August and the Defiance on 14 August, 
or no and in days respectively, from the date of planting. The 
period of vegetation was short and the ripening took place in 
clear warm weather. The soil was quite dry, ten of the twelve 
plots which we shall discuss had received but little, so good as no 
water, since 12 June. All of the wheat was threshed on 21 and 
22 August without having so much moisture as a heavy dew fall 
upon it after cutting. 
In 1914 all plots were sowed on the afternoon of 6 and morn¬ 
ing of 7 April, and harvested 6, 7 and 8 August. Fife was rather 
over-ripe. All of the plots were cut 122 or 123 days from plant¬ 
ing. The irrigating water applied was one foot on all except plots 
4 and 8, which received two irrigations, amounting to one and one- 
half acre-feet. In these statements I am making no note of a few 
hundredths of a foot either way. For our present purposes we omit 
the rainfall during the vegetative period. It may, however, be 
taken as six inches per year for the two- years. This is very nearly 
correct. The time and manner of rainfall is of much more conse¬ 
quence to us than the amount that we usually have. We threshed 
all of the lots on 21 and 22 August. So far as the harvesting and 
threshing of these wheats are concerned the weather conditions 
were perfect. The Fife was unfortunately ripe enough to shatter 
a little but had stood not more than two days longer than was 
desirable. While the Defiance and Kubanka are normally about 
eight to ten days later in maturing than the Fife, they were not 
more than one or two days later than this variety in 1914. This 
abnormally early ripening was due to a shower that fell, 28 July, 
accompanied by some wind. The shower was of short duration but 
violent. It beat these varieties down rather badly, the leaves and 
stems, especially on some of the plots of Defiance, rusted and the 
crop was very materially injured. The same was true of the Ku¬ 
banka but not to the same extent as of the Defiance. The Fife 
was scarcely injured at all by this shower because it was some¬ 
what nearer maturity. 
In order to facilitate the understanding of the experiments I 
add a plan o-f the experiments and the results obtained in 1913 
on the plots considered in this bulletin. 
