720 
Journal of Agricultural Research 
Vol. XXVII, No. to 
Table I .—Sorghum plants grown on Thurston loam subsoil, with nitrate applied 
intervals 
at 
Lot. 
Jar 
number. 
Age of 
plants. 
Nitrate applied. 
Average 
height. 
Average 
weight. 
Hydrocyanic acid 
(HCN). 
Per jar. 
Per acre. 
Per cent. 
Per plant. 
“ 
Days. 
Gin. 
Lb. 
Cm. 
Gm. 
Mgm. 
A 
I 
6l 
None. 
None. 
16 
0-3 
None. 
None. 
A 
2 
6l 
1. 25 
3 i 4 
5 1 
7.0 
0. 0082 
o- 573 
A 
3 
6l 
1.25 
3 i 4 
40 
5 * 0 
. 0070 
• 35 ° 
A 
4 
6l 
1. 50 
376 
43 
6. 0 
Trace. 
Trace. 
A 
5 
6i 
75 
440 
40 
5 *o 
. 0028 
. 140 
A 
6 
6i 
3-25 
815 
53 
9.0 
. 0049 
• 43 ° 
B 
7 
64 
1.25 
3 1 4 
46 
4.0 
. 0012 
. 048 
B 
8 
64 
I - 2 5 
314 
5 -o 
.0033 
. 165 
B 
9 
64 
2. 00 
502 
61 
10. 0 
. 0098 
. 980 
B 
IO 
64 
5- 2 5 
I , 3 I 7 
56 
9.0 
• 0439! 
! 3 * 940 
C 
ii 
75 
None. 
None. 
J 3 
°* 3 
None. 
None. 
C 
12 
75 
i- 5 o 
376 
40 
3*3 
. 0029 
. 096 
c 
J 3 
75 
1. 50 
37 6 
3-3 
. 0078 
.258 
c 
14 
75 
75 
440 
33 
4 . 5 
. 0016 
. 072 
c 
r 5 
75 
2. 25 
564 
33 
3 - 7 
. 0094 
• 33 o 
c 
16 
75 
10. 25 
2. 572 
33 
4 - 5 
. 0082 
• 37 ° 
D 
17 
86* 
50 
376 
48 
4. 0 
. 0082 
• 33 C 
r> 
18 
86 
i- 75 
440 
56 
4. 0 
.0348 
1. 390 
D 
*9 
86 
2. 00 
5°2 
46 
3 - 0 
.0340 
1. 050 
D 
20 
86 
2. 50 
625 
53 
4. 0 
•0353 
1. 410 
D 
21 
86 
r 5 - 25 
3.827 
53 
5-5 
• * 3 J 3 
7.250 
Table II .—Sorghum plants grown on Merrimac loamy sand with and without nitrate 
applications 
Lot. 
Jar 
num¬ 
ber. 
Age of 
plants. 
Nitrate applied. 
Average 
height. 
Average 
weight. 
Hydrocyanic acid 
(HCN). 
Part of plant 
analyzed. ' 
Per jar. 
Per acre. 
Per cent. 
Per plant. 
Days. 
Gm. 
Lb. 
Cm. 
Gm. 
Mgm. 
E 
22 
46 
None. 
None. 
IO. O 
0. 0123 
I. 230 
Whole plant. 
E 
23 
46 
1*25 
310 
9.0 
. 0246 
2. 214 
Do. 
F 
24 
48 
None. 
None. 
. 0098 
heaves only. 
F 
25 
48 
1-25 
310 
. 0836 
Do. 
G 
26 
63 
None. 
None. 
61 
7.0 
. 0234 
I. 638 
Whole plant. 
G 
27 
63 
i- 5 o 
375 
71 
13. O 
. 0314 
4. 080 
Do. 
H 
28 
72 
None. 
None. 
46 
3 - 5 
None. 
None. 
Do. 
H 
29 
72 
None. 
None. 
i 
4.0 
Trace. 
Trace. 
Do. 
H 
30 
72 
1. 50 
375 
56 
16. O 
.0369 
5 - 91 
Do. 
H 
3 1 
72 
50 
375 I 
10. 0 
•° 34 S 
3 - 45 
Do. 
I 
32 
89 
None. 
None. 1 
56 
7.0 
. 0041 
. 280 
Do. 
I 
33 
89 
2. 00 
502 
69 
10. 0 
. IIOO 
11. 00 
Do. 
I 
34 
89 
2. 00 
502 
64 
9.0 
. 0460 
4. 14 
Do. 
All the plants grown on the Coloma sand were small, but the difference 
both in size and percentage of hydrocyanic acid content was noticeably in 
favor of those treated with nitrate. The total amount of hydrocyanic 
acid per plant was a hundred times as great in the latter (Table III). 
