33 
A Study oe Colorado Wheat 
obtained the following figures on 15 July, 1913, for Section 1700: 
Nitrogen applied, 120 pounds per acre, 10.1 tons; phosphorus ap¬ 
plied, 60 pounds per acre, 8.3 tons; potassium applied, 200 pounds 
per acre, 7.4 tons; check, which received no fertilizer, 7.0 tons. 
The tables given above, together with these approximate figures, 
serve to give an idea of the effects produced upon the production of 
green matter by the fertilizers applied and some idea of the relative 
development of stems and heads. 
THE DRY MATTER IN THE PLANTS. 
The dry matter in the plants was also determined, but we had 
to use other samples. The earliest sample taken for this purpose 
was cut 7 July, 1913, at the time of blooming. The results are 
given in the following table for the whole plant till 28 July, but 
on this and subsequent dates the stems and heads were weighed 
separately. 
DRY MATTER IN WHEAT PLANTS GROWN WITH 
DIFFERENT FERTILIZERS. 
Date 
Section 
Variety 
7 
July, 
1913 
1700 
Defiance 
7 
July, 
1913 
1700 
Defiance 
7 
July, 
1913 
1700 
Defiance 
7 
July, 
1913 
1700 ' 
Defiance 
9 
July, 
1913 
1700 
Red Fife 
9 
July, 
1913 
1700 
Red Fife 
9 
July, 
1913 
1700 
Red Fife 
9 
July, 
1913 
1700 
Red Fife 
9 
July, 
1913 
3 700 
Kubanka 
9 
July, 
1913 
1700 
Kubanka 
9 
July, 
1913 
1700 
Kubanka 
9 
July, 
1913 
1700 
Kubanka 
10 
July, 
1913 
1900 
Defiance 
10 
July, 
1913 
1900 
Defiance 
10 
July, 
1913 
1900 
Defiance 
10 
July, 
1913 
1900 
Defiance 
10 
July, 
1913 
1900 
Red Fife 
10 
July, 
1913 
1900 
Red Fife 
10 
July, 
1913 
1900 
Red Fife 
10 
July, 
1913 
1900 
Red Fife 
10 
July, 
1913 
1900 
Kubanka 
10 
July, 
1913 
1900 
Kubanka 
10 
July, 
1913 
1900 
Kubanka 
10 
July, 
1913 
1900 
Kubanka 
Air-dry 
matter 
Fertilizer 
per acre 
Percent 
120 
pounds 
nitrogen 
27.02 
60 
pounds 
phosphorus 
30.78 
200 
pounds 
potassium 
31.71 
None 
30.00 
120 
pounds 
nitrogen 
29.47 
60 
pounds 
phosphorus 
34.22 
200 
pounds 
potassium 
34.06 
None 
34.29 
120 
pounds 
nitrogen 
32.66 
60 
pounds 
phosphorus 
33.60 
200 
pounds 
potassium 
32.42 
None 
32.66 
40 
pounds 
nitrogen 
29.38 
20 
pounds 
phosphorus 
•33.60 
100 
pounds 
potassium 
32.34 
None 
32.34 
40 
pounds 
nitrogen 
30.55 
20 
pounds 
phosphorus 
36.25 
100 
pounds 
potassium 
33.83 
None 
33.75 
40 
pounds 
nitrogen 
31.34 
20 
pounds 
phosphorus 
32.11 
100 
pounds 
potassium 
33.05 
None 
30.86 
