86 
Colorado Experiment Station 
Fife and Kubanka was seed obtained from the South Dakota Experi¬ 
ment Station. Our own seed was wheat which had been grown on the 
college farm for many years. The strain is accepted as pure and the 
variety well established. The Dakota seed was true to variety and 
pure. It is stated that acclimatization has but little or no influence 
upon the composition of the crop produced when the seed is transport-' 
ed, as in this case, from one locality to another. I accept this as estab¬ 
lished and attribute any changes in the character of the crop to local 
conditions, either of soil, or climatic, or both. The physical character¬ 
istics of the first crop were very dilferent from the parent seed, this, 
however, was true of the crop from our own seed in a certain measure, 
but not to the same extent as for the crops produced from the Dakota 
seed. Both the Fife and the Kubanka berries were much larger and 
different in color. Being curious to learn how the 1913 crops grown in 
South Dakota would compare in composition with my crops, grown- 
from the same seed, I obtained, through the courtesy of their Depart¬ 
ment ol Agronomy, samples of this crop.. My object was not simply 
to test the effect of change but I0 assure myself in regard to the effects 
of my fertilizer experiments, \’vhich I shall present later. At the pres¬ 
ent time I shall endeavor to present the general composition. 
GENERAL COMPOSITION OF WHEATS IN 1913, 1914, AND 1915 
) 
Under the general consideration of the weather conditions I have 
pointed out one result which did very great injury, i.e., that these con¬ 
ditions brought about a very severe attack of rust. I have already 
touched upon the effects of this on the yield and weight per bushel, 
giving for the latter 62.3, 56.7, and 49.6 pounds in the respective years 
of 1913, 1914 and 1915. This was for Defiance from the check plots 
of Section 1800. The weight per bushel of the other varieties was not 
depressed in 1914 but was slightly depressed in 1915. This indicates 
that some of the wheat was badly shrunken. Each of the three varie¬ 
ties was severely attacked by the fungus. 
Before I give the composition of the wheat for these three years, 
I wish to again state that my data do not answer the question relating 
to the effect of planting wheat after wheat on the composition of the 
second or third crop, and I cannot recall having seen any answer to 
this question. The growth of the plants, the yield per acre and the 
weight per bushel have been mentioned as indicating that there was no 
lack of plant food, but it must be admitted that all of these taken to¬ 
gether lack in conclusiveness when we consider the composition. 
For our present purpose, i.e., to give a general idea of the com¬ 
position of these crops, wo shall confine ourselves to the amounts of 
protein, starch, wet, dry and true gluten, and phosphorus. The varia- 
