30 Colorado Experiment Station 
consider the latter as the cause of it at that time. All that 
we can say is that the rust intensified this effect and apparently 
produced a similar if not an identical result. If we compare the 
ratio of the total nitrogen to the proteid nitrogen in the heads for 
the last eight samples taken in 1913, and for the last ten samples 
taken in 1915, we find it higher in 1913 than in 1915, 1.18 against 
1.03; that is, the total and proteid nitrogen in the heads at the end of 
the season were more nearly equal in 1915 than in 1913, though both 
were decidedly lower in 1915. There was not only less protein in 
the whole plant than in 1913, but a larger percentage of it remained 
in the leaves and stems (straw). 
AMMONIC AND AMID NITROGEN IN WHEAT PLANTS IN 1915 
Ammonic Nitrogen Amid Nitrogen 
Per cent 
Per cent 
Date 
Fertilizer per Acre 
Stems 
Leaves 
Heads 
Stems 
Leaves 
Heads 
13 July 
Nitrogen, 120 pounds .... 
.00265 
.00638 
.00638 
.00597 
.00270 
.00665 
13 July 
Phosphorus, 60 pounds . . . 
.00529 
.00162 
.00652 
.00299 
.00358 
.00802 
13 July 
Potassium, 200 pounds . . . 
.00162 
.00475 
.00692 
.00270 
.00489 
.00162 
13 July 
None . 
.00189 
.00393 
.00610 
.00243 
.00407 
.00816 
16 July 
Nitrogen, 80 pounds . 
.00299 
.00707 
.01768 
.01224 
.00625 
.01034 
16 July 
Phosphorus, 40 pounds . . . 
.00216 
.00434 
.00789 
.00380 
.00380 
Lost 
16 July 
Potassium, 150 pounds .... 
.00216 
.00652 
.01088 
.00366 
.00434 
.01224 
16 July 
None . 
.00216 
.00734 
.00925 
.00270 
.00489 
.01101 
20 July 
Nitrogen, 40 pounds . 
.00216 
.00339 
.00789 
.00270 
.00299 
.00979 
20 July 
Phosphorus, 20 pounds . . . 
.00243 
.00366 
.00879 
.00284 
.00420 
.00965 
20 July 
Potassium, 150 pounds . . . 
.00189 
.00366 
.00897 
.00270 
.00256 
.00665 
20 July 
None . 
.00216 
.00353 
.00843 
.00216 
.00284 
.01101 
23 July 
Nitrogen, 120 pounds .... 
.00610 
.00992 
.01468 
.00556 
.01170 
.01427 
23 July 
Phosphorus, 60 pounds . . . 
.00189 
.00610 
.00816 
.00299 
.00570 
.00652 
23 July 
Potassium, 200 pounds . . . 
.00189 
.00652 
.00610 
.00216 
.00434 
.00393 
23 July 
None . 
.00216 
.00516 
.00816 
.00216 
.00489 
.00679 
27 July 
Nitrogen, 80 pounds . 
.00189 
.00763 
.00817 
.00353 
.00583 
.00592 
27 July 
Phosphorus, 40 pounds . . . 
.00162 
.00326 
.00707 
.00202 
.00284 
.00434 
27 July 
Potassium, 150 pounds . . . 
.00189 
.00353 
.00925 
.00353 
.00216 
.00457 
27 July 
None . 
.00162 
.00339 
.00843 
.00175 
.00216 
.00652 
30 July 
Nitrogen, 40 pounds . 
.00202 
.01183 
.00707 
.00339 
.01387 
.00870 
30 July 
Phosphorus, 20 pounds . .» 
.00162 
.00570 
.00843 
.00216 
.00707 
.00610 
30 July 
Potassium, 100 pounds . . . 
.00162 
.00366 
.00789 
Lost 
.00543 
.00447 
30 July 
None . 
.00148 
.00420 
.00856 
Lost 
Lost 
Lost 
6 Aug. 
Nitrogen, 120 pounds .... 
.00679 
.00665 
.00843 
.00707 
6 Aug. 
Phosphorus, 60 pounds . . . 
.00284 
.00679 
Lost 
.00380 
6 Aug. 
Potassium, 200 pounds . . . 
.00353 
.00462 
.00420 
.00407 
6 Aug. 
None . 
.00284 
.00638 
None 
.00162 
9 Aug. 
Nitrogen, 80 pounds . 
.00734 
.00353 
.00816 
.00747 
9 Aug. 
Phosphorus, 40 pounds . . . 
.00270 
.00543 
.00407 
.00515 
9 Aug. 
Potassium, 150 pounds . . . 
.00407 
.00353 
.00570 
.00489 
9 Aug. 
None . 
.00261 
.00652 
.00366 
.00720 
12 Aug. 
Nitrogen, 40 pounds . 
.00762 
.00734 
.00638 
.00543 
12 Aug. 
Phosphorus, 20 pounds . . . 
.00489 
.00462 
.00434 
.00502 
12 Aug. 
Potassium, 100 pounds . . . 
.00543 
.00462 
.00407 
.00353 
12 Aug. 
None . 
.00434 
.00407 
.00489 
.00665 
