Yellow-berry in Wheat 
3i 
there is, as shown by the yield of the check plots, an ample supply 
of nitrogen to grow bountiful crops, 38 and 33, 31 and 43, and 
36 and 43 bushels for the checks with different varieties for the 
respective years, but the degree of mealiness or starchiness, the 
yellow-berry, in the wheat depends upon the relative available 
supply of these two elements. 
The object of this bulletin is to show this cause and to offer 
some suggestions regarding the prevention of yellow-berry, and 
not to discuss the quality of the wheat. This feature is reserved 
for presentation with further results of our study which may not 
appear for some time. This much may, however, be stated at this 
time. The composition of the wheat, whether it involves quality 
or not, is profoundly affected. This result is independent of “cli¬ 
matic conditions.” What modifying influence “climatic 'condi¬ 
tions” may exercise I will not at this time attempt to discuss, but 
it is subordinate, so far as yellow-berry and its effects are con¬ 
cerned, to the influence of the soil,—in this case, specifically to the 
potassium-nitrogen ratio. 
The record of yellow-berry for the two years 1013 and to 14 
on the twelve plots taken into consideration in this bulletin is gfiven 
below, together with the record of “black-pointed” berries for 
Percentage oe Yellow-berry in Crops oe 1913 and 1914. 
1913 " 1914 
Black-pointed 
Yellow- 
Yellow- 
Variety 
Fertilizer 
berries 
berries 
berries 
percent 
percent 
percent 
Defiance 
Nitrogen. 
. 6.7 
none 
none 
Phosphorus. 
. 12.9 
10.0 
50.0 
Potassium. 
. 15.3 
30.0 
63.0 
Check. 
. 13.0 
24.0 
36.0 
Red Fife 
Nitrogen. 
. 2.0 
none 
24.0 
Phosphorus. 
. 5.0 
24.0 
97.0 
Potassium. 
. 5.0 
42.0 
98.0 
Check. 
. 5.0 
31.0 
98.0 
Kubanka 
Nitrogen. 
. 5.0 
none 
23.0 
Phosphorus. 
. 12.6 
35.0 
94.0 
Potassium . 
. 9.5 
37.0 
96.0 
Check . 
. 16.0 
31 
97.0 
Results observed in field culture 
Turkey Red Land affected by nitre. 2 5.0 
Land not affected by nitre. 100.0 
The statement of these results in percentages of spotted and 
yellow-berries conveys no adenuate notion of the differences notice¬ 
able between these samples. The potassium not only increased the 
