Yeeeow-berry in Wheat 
37 
The wheats received essentially the same treatment throughout the 
season, irrigation and care, except that his was harvested by hand 
and mine with a reaper. This comparison is of Red Fife with Mar¬ 
quis. In comparing Kubanka grown from my own seed on 
fallowed ground and grown on my check plot, I find that 
grown on fallowed ground to contain 13 per cent of affected 
berries and that grown on my cropped' ground is practically all af¬ 
fected, by actual count 97 percent. It may be argued that my land 
was deficient in nitrogen because I had grown a crop of wheat on 
it the preceding year and had added no nitrogen to compensate for 
what I had taken off; this is true, but I had not affected the pro¬ 
ducing capacity of the soil, as the crop harvested was 43 bushels of 
wheat weighing 65 pounds per bushel. On the other hand we 
know that this land rapidly enriches itself in nitric nitrogen, so 
much so, that in October 1914, fallowed land, now planted to wheat 
contained nitric nitrogen equivalent to 518 pounds of sodic nitrate 
taken to a depth of seven inches. Such land will not produce yel¬ 
low-berry. 
It is evident that different pieces of land will require different 
treatment and no rule can take the place of intelligent observation 
and some experimentation on the part of the grower himself. 
The difference in composition and quality of flinty and yellow-berry 
kernels have been reserved for later discussion. 
SUMMARY. 
The appearance of yellow or white, mealy or half-mealy, or 
spotted kernels in wheat, otherwise without apparent blemish and 
known as Yellow-berry, is not due to over-ripeness, nor to exposure 
after cutting, nor to the action of fungi, nor is it a “tendency” herit¬ 
able in the wheat, as has been claimed by different authors. 
We have no substantiation of the claim sometimes made that 
climatic conditions favorably influence, the development of, or cause 
yellow-berry. 
Yellow-berry can be very much lessened or entirely prevented 
by the application of a sufficient quantity of available nitrogen. 
Yellow-berry can be greatly intensified or increased by the ap¬ 
plication of available potassium. 
The application of available phosphorus has no appreciable 
effect upon its prevalence. 
Yellow-berry is not indicative of an exhausted soil, that is, one 
which will not produce abundant yields. 
Yellow-berry indicates that potassium is present in excess of 
what is necessary to form- a ratio to the available nitrogen present, 
advantageous to the formation of a hard, flintv kernel. 
o 
