EFFECT OF NITROGENOUS FERTILIZERS. 147 
fore in proportion to the increase in nitrogen. These are the 
results from the use of nitrogen in nitrate of soda. There was 
less gain in the proportion of protein in the grain following 
the use of nitrogen in sulphate of ammonia, and still less from 
the use of organic nitrogen in dried blood. ‘ 
A somewhat similar discussion might apply to the figures 
in Table 16, showing the effect of nitrogen upon the straw 
without the grain. From this table, however, it appears that 
the largest gains and more uniform increase in protein resulted 
from the use of sulphate of ammonia. | 
The following table shows the effect of nitrogenous fer- 
tilizers upon oats by a comparison of the calculated yields of 
dry matter and of protein in the crops. The figures given here 
are the averages in bold face type found in Tables 33 and 34 
on pages 187 and 188. 
It will be noticed here also, as has been mentioned in the 
discussion of results with other crops, that the yields of dry 
matter increased gradually with the increase of-the quantities 
of nitrogen used in the fertilizers; but the protein increased 
much more rapidly. 
ingreatents of oats (grain) and oat straw, with a comparison of per- 
the basts of the yield from the mineral plots. 


PERCENTAGE OF YIRLD 





AVERAGE YIELDS OF PROXIMATE CONSTITUENTS ON THE BASIS OF THR 
OF OATS (GRAIN) AND OAT STRAW PER ACRE, YIELD FROM THE 
MINERAL PLOTS. ~ 
Plot No. 
Dry |Protein.| Fat. |. Nitrogen | piber.| Ash. Dry Protein. 
matter. free extract. matter. 
malbs; Ibs; | lbs. lbs. Ibs. |Ibs.| Per cent. | Per cent. 
421 64 | 25 277 4I | 15 98 95 
545 33°) -18 251 213 | 31 59 75 0, 0Q, 000 
966 97 | 43 528 254 | 46 de 88 
430 67 oy) 25) 36) ie13 100 100 
919 44 27 422 274) 53 100 I00 6, 6a, 64, 6c 
1349 | Ji | 54 709 409 | 66 100 100 
521 82 32 344 49 | 16 121 122 
1264 57 38 580 523 | 66 138 130 Ty1O,ats 
$785 | 339) 70 924 572 | 82 132 $25 
563 98 Bas i 367 eg de 131 134 
PAOTO) JI 42) 673 598 | 77 159 161 | (8, 11, ¥4 
2024 | J6% | 75 1040 655075 150 145 
626 103 36 405 65 | 18 146 154 
I9OI 1g 54 870 767 | 99 207 255 9, 12.55 
ozs eo 9) 183275 832 |537 187 194 



