16 Colorado Experiment Station 
CROP of 1915 
Fertilizer 
.Section 
Variety 
Pounds per 
Acre 
Bushels 
per Acre 
Weight 
per Bushel 
Ratio of 
Straw to 
1700 
Defiance 
Nitrogen 120 
8.33 
47.00 
Wheat 
13.40 
1800 
Defiance 
Nitrogen 80 
10.83 
47.00 
7.00 
1900 
Defiance 
Nitrogen 40 
13.70 
51.00 
4.50 
1700 
Defiance 
Phosphorus 60 
21.16 
51.00 
3.19 
1800 
Defiance 
Phosphorus 40 
22.50 
50.00 
3.96 
1900 
Defiance 
Phosphorus 20 
30.40 
52.75 
2.54 
1700 
Defiance 
Potassium 60 
26.83 
53.00 
3.16 
1800 
Defiance 
Potassium 40 
25.33 
52.50 
2.13 
1900 
Defiance 
Potassium 20 
23.50 
55.25 
3.33 
1700 
Defiance 
Check 
20.58 
49.75 
3.05 
1800 
Defiance 
Check 
19.50 
49.00 
4.43 
1900 
Defiance 
Check 
18.50 
50.00 . 
2.84 
1700 
Red Fife 
Nitrogen 120 
23.33 
53.50 
3.79 
1800 
Red Fife 
Nitrogen 80 
23.66 
56.50 
4.69 
1900 
Red Fife 
Nitrogen 40 
24.50 
56.26 
3.12 
1700 
Red Fife 
Phosphorus 60 
31.33 
60.00 
3.17 
1800 
Red Fife 
Phosphorus 40 
33.00 
60.00 
2.43 
1900 
Red Fife 
Phosphorus 20 
29.50 
61.00 
3.28 
1700 
Red Fife 
Potassium 200 
32.50 
61.50 
2.28 
1800 
Red Fife 
Potassium 150 
33.16 
60.25 
2.84 
1900 
Red Fife 
Potassium 100 
30.83 
60.00 
1700 
Red Fife 
Check 
32.33 
60.75 
3.12 
1800 
Red Fife 
Check 
33.61 
60.50 
2.36 
1900 
Red Fife 
Check 
31.00 
61.00 
3.15 
1700 
Kubanka 
Nitrogen 120 
35.50 
59.00 
2.90 
1800 
Kubanka 
Nitrogen 80 
40.83 
60.00 
2.09 
1900 
Kubanka 
Nitrogen 40 
21.91 
61.00 
2.09 
1700 
Kubanka 
Phosphorus 60 
36.50 
62.50 
2.06 
1800 
Kubanka 
Phosphorus 40 
39.75 
62.25 
2.36 
1900 
Kubanka 
Phosphorus 2o 
23.75 
62.00 
2.44 
1700 
Kubanka 
Potassium 200 
36.16 
62.75 
2.55 
1800 
Kubanka 
Potassium 150 
34.91 
63.00 
2.70 
1900 
Kubanka 
Potassium 100 
25.01 
62.50 
3.64 
1700 
Kubanka 
Check 
36.25 
62.00 
2.68 
1800 
Kubanka 
Check 
35.16 
63.00 
3.10 
1900 
Kubanka 
Check 
27.00 
63.00 
2.55 
It is scarcely proper to give the ratio of straw to wheat for 1915, 
for the reason that a very liberal seeding of wild oats was applied with 
the irrigating water in September, 1914, preparatory to cultivation. 
There was enough of the wild oats to affect the ratio so seriously as to 
make it of but little value, still it does not lead us astray in concluding 
that the ratio in 1915 was not far from twice as high as in the preceding 
years. The promise for a very large yield was good up to the last week 
in July, except on the nitrated plots, some of which were badiy lodged. 
About the end of July, due to light rains and cloudy weather, rust at¬ 
tacked all of the plants badly, but injured the Defiance worse than the 
other varieties. It is my judgment that the effects of this parasite, 
which were marked, upon the composition of the plant, as is shown in 
Bulletin 217, were greater than those of the weather. 
