Jan. io, 1914 
Environmental Influences on Wheat 
277 
During the first two years, 1908 and 1909, Crimean wheat obtained 
from seed grown in Kansas was used on all 12 plats. As this variety 
was not adapted to conditions prevailing in Maryland and California, 
Turkey wheat was selected for 1910, 1911, and 1912. The change from 
Crimean to Turkey wheat did not interfere, however, with the object of 
the experiment, which was to determine the influence exerted by cli¬ 
matic conditions and soil on the composition of the crop. 
The following determinations were made according to the methods 
given in Bulletin 107, Revised, of the Bureau of Chemistry, entitled 
“Official and Provisional Methods of Analysis/' 
Water; weight of 1,000 grains; weight of a bushel; flinty grains; nitro¬ 
gen; alcohol-soluble nitrogen; fat; fiber; pentosans; sugars; ash; phos¬ 
phoric acid; and potash. The alcohol-soluble nitrogen was determined 
by treating a certain quantity of ground wheat with a 70 per cent solu¬ 
tion of alcohol at ordinary temperature, with frequent shaking, for sev¬ 
eral hours, and then allowing the solution to stand overnight. An 
aliquot part was taken and the nitrogen therein determined. The 
amount of nitrogen thus obtained divided by the total quantity of 
nitrogen in the sample gave the gliadin number. 
TABULATION OF BATA 
The data are collected in a number of tables. In Table I, first col¬ 
umn, is given the analysis of the original seed grown in Kansas in 1908, 
which was used as seed on all the plats for the following year's crop. 
The other analyses in t Table I and the data in Tables II to IV were 
obtained on crops grown in 1909, 1910, 1911, and 1912, the results be¬ 
ing grouped by locality. The data from the different soil plats and the 
check-soil plat in each locality are arranged in adjacent columns in 
Table I. In Table II the same data, exclusive of check-plat data, are 
rearranged, the results from the same soils being grouped in adjacent 
columns. Averages derived from these data are given in Tables III, TV r 
and V. In Table III are shown the averages of all the constituents 
from crops grown in California, Kansas, and Maryland, not including the 
check-soil plat, throughout the four years of the experiment. Table IV 
gives the averages obtained from data on the crops grown on the soils of 
California, Kansas, and Maryland for each of the three localities and for 
all four years. Finally, in Table V are shown the averages for the undis¬ 
turbed or check-soil plats and for the corresponding plats in which the 
soil had been taken up in 3-inch layers and replaced. 
