40 
Colorado Experiment Station 
“The grain from the unmanured plots Nos. 1, 7, and 12 were mostly 
half-mealy or transitional, light colored, large and plump with smooth and 
lustrous surface; even the flinty kernels showed this latter characteristic. 
“The grain froim plots Nos. 4, 8, and 11 manured with superphosphate 
and phosphoric acid showed exactly the same characteristics, but varied more 
in size; the number of small, mostly flinty (glassy) kernels was apparently 
equal to that of the large ones. 
“The nitrogenous fertilizers,* Nos. 2, 5, and 9 produced only small, but 
well-formed, thoroughly hard; flinty and dark colored kernels. 
“The kernels obtained from the mixed manuring. Nos. 3, 6 and 10, were 
like those in the case of pure nitrogenous manuring, all small, hard, flinty 
and dark, together with no small number of shrunken and imperfectly form¬ 
ed kernels.” 
Ritthausen and Dr. R. Pott give the nitrogen contained in these 
grains; the maximum for the check plots was 2.78 percent, that for 
the phosphoric acid plots was 2.77, that for the nitrogenous manure 
3.48, and that for the mixed manuring was 3-82 percent. The moisture 
in the samples was practically the same, the maximum variation in 12 
samples given being about 0.8 percent. 
FLINTY KERNELS HIGHER IN NITROGEN 
It is not specifically stated in the article that the flinty kernels are 
higher in nitrogen than the mealy ones, but it evidently can be inferred 
that this is so. This, however, is generally stated to be a fact. Schin¬ 
dler has been quoted on a previous page as stating “This is also the case 
even when the flinty and starchy kernels are of the same variety and have 
been produced in the same field.... P. Holdefleiss found that in one and the 
same crop of early Bastardweizien the flinty kernels contained 1.957 percent 
of nitrogen ( 12.23 percent protein), the mealy ones on the contrary 1.566 
percent nitrogen ( 9.79 percent protein)”. The difference in the nitrogen 
content of flinty and starchy kernels is so thoroughly well established 
that it is almost, if not altogether, common knowledge. It is also quite 
as well known that the nitrogen content of the grain can be increased 
by the application of sodic nitrate or ammonium sulfate. We have 
so far, then, the following facts pertaining to the effects of nitrogen in 
the form of nitrates or an easily nitrifiable form of nitrogen; it affects 
the size of the kernel, tending to produce a small or even shrunken 
Grain ;t it produces a high degree of flintiness and with this a dark, 
♦ The nitrogenous fertilizers used were sodic nitrate and ammonic sulfate, 
t A similar observation is made in regard to the effect of nitrates in producing 
shrunken kernels in Ohio Bui. 243, p. 587, and illustrated on p. 572, show¬ 
ing 60 percent of shriveled kernels. 
