INDEX 
American writers generally attach the greatest importance to climatic 
conditions as determining the composition of wheat. 35 
Analysis of wheat plants and wheat straw. 126 
Ash constituents— 
especially phosphorus and potassium, not materially affected by 
the differences in the seasons. 99 
of seed used and crops produced in 1913, 1914 and 1916. 88 
of 1915 crop ... 83 
of 1914 crop ’..^. 79 
Average composition— 
of normal Colorado wheat. 65, 66 
of varieties of wheat grown in 1913, 1914 and 1915 taken section 
by section . 89-91 
of wheat ...’. 63 
Chlorin, determination of . 124 
Climate, too much importance attached to .. 37 
Colorado wheats— 
are semi-hard or hard wheats . 49 
equal to the best in chemical composition. 71 
rich in nitrogen . 28 
Comparison of Colorado and South Dakota wheats... 89 
Comparison of results obtained with standards adopted. 70 
Composition— 
of crops grown in 1914 .76, 77, 78 
differences in composition shown by flinty and yellow-berry wheats 
same in character for winter and spring wheat...'. 117 
of Hungarian wheat . 64 
of large and small kernels .. 85 
of seed used and crops produced in 1913, 1914, 1915. 86-88 
of wheats grown in different localities useless.. 26 
of wheat grown with and without manure and with different 
amounts of irrigating water . 106 
of wheats grown on our plots in 1913.55, 66 , 57 
of 1915 crops .80, 81, 82 
Crude fiber, variation in amount of, probably due to attack of rust. . . 99 
Crushing strength— 
of Colorado wheats . 49 
difference in, is from 3000 to 5000 grams in favor of flinty kernels 119 
flinty kernel.s have higher crushing strength than mealy ones of 
comparable size . 51 
plant’s nourishment influences ... 61 
of Red Fife lowered by drying . 50 
Determinations of iron, calcium, magnesium and the alkalis. 124 
Development of the plant at the time of unfavorable weather conditions 
very important ..... 74 
Dews, effect of . 119 
Dry-land wheat not especially rich in nitrogen .. . 29 
Factors which determined our crops. 17 
Fixation and nitrification, experiment on .. 5 
Fixation, more than sufficient to constitute a factor in our problem.. 4 
Flinty and yellow-berry wheat— 
Analysis of kernels grown under identical conditions. 42 
mineral constituents of. 44 
Flinty kernels— 
are richer in nitrogen than yellow-berry kernels. 40 
produced by application of sodic nitrate. 39 
Flinty and mealy kernels occur in many samples of Colorado wheat... 29 
