3-2 
Colorado Experiment Station 
sections and two sets from the third section in order to determine 
the green weight of the stems, leaves and heads. We confined 
these observations to the Red Fife. We chose the Fife because we 
judged it to be more nearly representative than the other varieties 
and because it was somewhat more advanced in development. The 
portion designated as leaves was obtained by stripping the stems 
by drawing them through the hand. In this manner we got the 
blade and part of the sheath, but this portion consisted mostly of 
blades. The first samples were taken 7 July, 1913, and the latest 
samples 5 August, but the wheat was so nearly ripe on this last 
date that the leaves formed only about 4.0 percent of the plant and 
are included with the stems. The percentages given in the follow¬ 
ing tables are for green weights. 
RATIO OF 
STEMS, LEAVES AND 
HEADS FOR 
RED FIFE. 
Sections 1700 
Date 
Fertilizer per acre 
Stems 
Leaves 
Heads 
Percent 
Percent 
Percent 
7 July, 1913. 
.Nitrogen, 120 pounds. 
. 65.40 
18.47 
16.13 
Phosphorus, 60 pounds 
. 66.57 
14.26 
19.17 
Potassium, 200 pounds. 
. 65.24 
12.99 
21.77 
None . 
. 70.84 
14.58 
14.58 
21 July, 1913. 
.Nitrogen, 120 pounds.. 
. 56.64 
12.65 
30.71 
Phosphorus, 60 pounds. 
. 54.48 
8.50 
37.02 
Potassium, 20o pounds 
. 54.73 
9.40 
36.47 
None . 
. 54.60 
9.91 
35.48 
4 August, 1913 ... 
.Nitrogen, 120 pounds.. 
. 56.27 
43.73 
Phosphorus, 60 pounus 
. 54.00 
46.00 
Potassium, 200 pounds. 
. 57.35 
42.65 
None . 53.80 . 46.20 
Section 1800 
7 
July, 
1913. 
..Nitrogen, 80 pounds. 
. . 60.22 
15.59 
24.19 
Phosphorus, 40 pounds.... 
.. 69.05 
13.49 
17.46 
Potassium, 150 pounds.... 
. . 66.60 
14.99 
18.41 
None . 
. . 69.39 
13.49 
17.21 
25 
July, 
1913. 
..Nitrogen, 80 pounds. 
.. 59.88 
8.56 
31.56 
Phosphorus, 40 pounds. . . . 
. . 56.25 * 
7.23 
36.52 
Potassium, 150 pounds.... 
.. 54.66 
6.43 
38.91 
None . 
. . 55.92 
9.86 
34.22 
5 
August, 1913.. 
..Nitrogen, 80 pounds. 
. . 58.76 
41.24 
Phosphorus, 40 pounds.. . . 
. . 57.41 
42.59 
Potassium, 150 pounds.... 
. . 58.67 
41.33 
None . 
. . 56.97 
43.03 
Section 1900 
13 
July, 
1913. 
..Nitrogen, 40 pounds. 
. . 63.01 
12.52 
24.47 
Phosphorus, 20 pounds.... 
. . 62.07 
10.09 
27.84 
Potassium, 100 pounds.... 
. . 61.57 
10.13 
28.30 
None . 
. . 62.77 
9.70 
27.53 
30 
July, 
1913. 
..Nitrogen, 40 pounds. 
.. 56.70 
7.10 
31.16 
Phosphorus, 20 pounds.... 
.. 55.68 
6.64 
37.68 
Potassium, 100 pounds.... 
. . 53.47 
5.15 
41.38 
None . 
. . 54.74 
7.05 
38.21 
We could only make an approximate determination of the total 
green matter per acre by cutting the plants on a given small area 
and weighing the same. We did this as accurately as we could and 
