Date 
13 July 
13 July 
13 July 
13 July 
16 July 
16 July 
16 July 
16 July 
20 July 
20 July 
>0 July 
20 July 
23 July 
23 July 
23 July 
23 July 
27 July 
27 July 
27 July 
27 July 
30 July 
30 July 
30 July 
30 July 
6 Aug. 
6 Aug. 
6 Aug. 
6 Aug. 
9 Aug. 
9 Aug. 
9 Aug. 
9 Aug. 
12 Aug. 
12 Aug. 
12 Aug. 
12 Aug. 
A Study of Colorado Wheat 
31 
NITRIC NITROGEN IN 
GREEN 
AND DRY 
WHEAT 
PLANTS 1915 
Dry plants, 
but Calculated 
Green Plants 
Back to 
Green 
Plants 
Fertilizer per Acre 
Stems 
Leaves 
Heads 
Stems 
Leaves 
Heads 
Nitrogen, 120 pounds .... 
.02269 
.01341 
None 
Phosphorus, 60 pounds . . . 
Trace 
None 
None 
Potassium, 200 pounds . . . 
.00054 
None 
None 
No samples preserved 
None . 
None 
None 
None 
Nitrogen, 80 pounds . 
.01996 
.01179 
None 
Phosphorus, 40 pounds . . . 
None 
None 
None 
Potassium, 150 pounds . . . 
.00039 
None 
None 
None . 
Trace 
None 
None 
Nitrogen, 40 pounds . 
.00620 
.00069 
None 
.02163 
.00514 
None 
Phosphorus, 20 pounds . . . 
.00043 
None 
None 
.00087 
None 
None 
Potassium, 100 pounds ... 
.00024 
None 
None 
None 
None 
None 
None . 
None 
None 
None 
None 
None 
None 
Nitrogen, 120 pounds .... 
.02886 
.01226 
.00048 
.01995 
.01954 
.00014 
Phosphorus, 60 pounds . . . 
None 
None 
None 
.00028 
None 
None 
Potassium, 200 pounds . . . 
None 
None 
None 
.00024 
None 
None 
None . 
None 
None 
.00034 
None 
None 
None 
Nitrogen, 80 pounds . 
.03283 
.00296 
None 
.00690 
.00061 
None 
Phosphorus, 40 pounds . . . 
.00126 
.00034 
None 
None 
None 
None 
Potassium, 150 pounds . . . 
.00043 
None 
None 
None 
None 
None 
None . 
None 
None 
None 
.00030 
None 
None 
Nitrogen, 40 pounds . 
.00489 
.00134 
None 
.00551 
None 
Phosphorus, 20 pounds . . . 
.00059 
None 
None 
None 
Potassium, 100 pounds . . . 
.00093 
None 
.00050 
None 
None . 
Lost 
None 
None 
None 
Nitrogen, 120 pounds 
Phosphorus, 60 pounds 
Potassium, 200 pounds 
None . 
Nitrogen, 80 pounds 
Phosphorus, 40 pounds 
Potassium, 150 pounds 
None . 
Nitrogen, 40 pounds . 
Phosphorus, 20 pounds 
Potassium, 100 pounds 
None . 
.02986 
None 
Trace 
None 
.02961 
None 
None 
None 
.00451 
.00046 
None 
.00023 
None 
None 
None 
None 
Trace 
None 
None 
None 
None 
None 
None 
None 
.03498 
None 
.00018 
Trace 
None 
None 
None 
.00018 
None 
None 
None 
Trace 
.00038 
None 
None 
None 
None 
None 
None 
None 
None 
None 
None 
None 
These tables, taken together with the one giving the ammomc 
and proteid nitrogen, present some instructive features. Assuming 
that the nitrogen used by the plants is furnished wholly by the soil 
in the form of nitrates, which in our ease is probably true, and refer¬ 
ring to the tables giving the nitric nitrogen for the respective years, 
we see that we have no reason to believe that there was a less supply 
in 1915 than in 1913. The table entitled “Distribution of the Ni- 
