990 
Journal of Agricultural Research 
Vol. XXX, No. 10 
protein nitrogen and for the protein 
nitrogen when the latter is referred to 
the oven-dried substance. The reverse, 
however, is true when the protein 
nitrogen is referred to the total nitro¬ 
gen. As to the ash content, Von 
Riimker rye is characterized by the 
highest percentage of ash, followed by 
Reg. Rosen and North Dakota No. 959 
in the order named. 
Inasmuch as both aqueous and alco¬ 
holic extracts were used for this work, 
we have determined the proportion of 
nitrogen that could be extracted by 
both solvents under certain conditions. 
Ordinarily 25-gram portions of flour 
were treated with 500 c. c. of boiling- 
hot ammonia-free water and kept on 
the water bath for 30 minutes and then 
filtered or centrifuged. The solid resi- 
Table I.— Proportion of ash and of total, of protein, and of nonprotein nitrogen 
in the ungerminated rye kernel 
Variety of rye 
Where and when grown 
Total 
nitro- 
gen, 
oven- 
dried 
rye 
Protein nitro¬ 
gen 
Nonprotein 
nitrogen 
Ash 
dried 
rye 
Oven- 
dried 
rye 
Total 
nitro¬ 
gen 
Oven- 
dried 
rye 
Total 
nitro¬ 
gen 
North Dakota No. 959 rye. 
Grown at Dickinson, N. 
Dak., in 1922. 
Per cent 
2.35 
2.41 
2.42 
2.45 
2.43 
2.43 
2.41 
Per cent 
2.01 
1.99 
2.06 
Per cent 
83.40 
82.77 
85.50 
Per cent 
0.40 
.42 
.35 
Per cent 
16.60 
17.23 
14.50 
Per cent 
1.79 
1.79 
1.78 
1.80 
1.78 
2.41 
2.02 
83.89 
.39 
16.11 
1.79 
Von Riimker rye, C. I. 
133. 
Grown at-in 1923. — 
1.86 
1.83 
, 1.85 
1.83 
1.60 
1.55 
1.58 
87.02 
84.38 
85.79 
.24 
.29 
.26 
12.98 
15.62 
14.21 
2.13 
2.13 
2.06 
2.10 
1.84 
1.58 
85.73 
.26 
14.27 
2.11 
Reg^ Rosen rye No. R 22, 
Grown at Parma, Mich., 
1.65 
1.62 
1.64 
1.48 
1.53 
1.52 
89.71 
92.73 
92.12 
.17 
.12 
.13 
10.29 
7.27 
7.88 
2.04 
2.02 
2.04 
1.67 
1.65 
1.67 
1.65 
.14 
8.48 
2.04 
Table II.— Proportion of nitrogen extracted by water and alcohol 
Variety of rye 
Nitrogen extracted 
by water 
Nitrogen extracted 
by 92 per cent 
alcohol 
Milli- 
i grams 
In peF 
cent of 
oven- 
dried 
flour 
Milli¬ 
grams 
In per 
cent of 
oven- 
dried 
flour 
North Dakota No. 959 Rye. ... . 
/ 50.9684 
\ 50.9123 
0.55 
.55 
56.4043 
56.4183 
0.152 
.152 
Average......... 
.55 
1 
! .152 
Von Riimker Rye, C. I. 133... 
/ 44.9581 
\ 45.8267 
.49 
.50 
58.2395 1 .158 
58.9121 | . 160 
Average..... 
.50 
.159 
Reg. Rosen Rye No. R 22198.... 
. ... 
/ 44.6499 
\ 43.8093 
.48 
.47 
1 56.2782 | . 152 
| 55.7178 ' . 150 
Average........ 
.48 
.151 
I" -- . 
