28 
The; Colorado Experiment Station 
The experiments mentioned were made in sets of three and a 
check. Inasmuch as we used three varieties we have a series of 
twelve experiments on each of three sections of land. In this 
place I will give the results from one section only, but I will give 
the results for two years, in which we have wheat after wheat. 
The varieties used were, as stated, Defiance, Red Fife and Ku¬ 
banka. I applied liberally each of the desirable elements, nitrogen, 
phosphorus and potassium, singly but not in combination. My 
reason for doing this has nothing to do with the object of this 
bulletin. I have stated the quantities applied but I wish to- divorce 
the subject of yellow-berry from all questions of yield and quality 
in so far as I possibly can. I will give the yield and weight per 
bushel for the two years to remove any impression of exhausted 
soil or unfavorable cultural conditions. 
Yield and Weight per Bushel, Crops oe 1913 and 1914. 
1913 1914 
Designation 
Area 
Bushels 
Wt. 
Bu. 
Wt. 
Variety 
of plot 
of plot 
per acre 
lbs. 
per bu. 
per 
acre 
lbs. per 
bushel 
Defiance 
Nitrogen Plot. 
. . 1-10 acre 
42 
60 
29 
56 
Phosphorus Plot... 
. . 1-10 acre 
40 
62 
39 
58i/ 2 
Potassium Plot.... 
. . 1-10 acre 
43 
62 
37 
591/2 
Check Plot. 
. . 1-10 acre 
38 
62 y 2 
33 
56 
Red Fife 
Nitrogen Plot. 
39 
63 
52 
64% 
Phosphorus Plot... 
. . 1-10 acre 
33 
63i/ 2 
45 
631/2 
Potassium Plot.... 
. . 1-10 acre 
33 
63i/ 2 
44 
64% 
Check Plot. 
. . 1-10 acre 
31 
631/2 
43 
63% 
Kubanka 
Nitrogen Plot. 
39 
63 
49 
64% 
Phosphorus Plot. . . 
. . 1-10 acre 
38 
641/2 
47 
65 
Potassium Plot.... 
. . 1-10 acre 
37 
64% 
45 
65 
Check Plot. 
36 
631/2 
43 
65 
These yields including the Fife check 1913, and all of the 
Defiance plots for 1914, give no hint of exhausted soil and only by 
comparison with the yields of the other plots do they hint of any 
unfavorable conditions. 
Some of these wheats are badly affected with yellow-berry and 
the most of them, almost all of them in fact, are affected in some 
degree. The only other affections at all noticeable in these samples 
are now and then a berry discolored brown and a few black-ended 
berries. The black-ended and brown berries are due to- infection 
by fungi. The number of such berries was not greater in 1914 than 
in 1913, though I used the crop of 1913 for seed in 1914 and used 
the same plots for the respective varieties. Neither the seed nor 
the soil was treated in any manner. This is simply a statement of 
