Apr. i, 1921 
33 
9 
Effect of Time of Irrigation on Kernel Development 
Table I .—Average length, lateral diameter, dorsoventral diameter , and percentage and 
weight per kernel of dry matter , water, nitrogen , and ash in kernels of Hannchen barley 
sampled at 24-hour intervals from eight plots variously irrigated at the Aberdeen Substa¬ 
tion, Aberdeen, Idaho, in 1917 —Continued 
PLOT 6 
Lateral 
diam¬ 
eter. 
Dorso- 
ven- 
Percentage of weight per 
kernel. 
Weight per kernel. 
Date. 
Length. 
tral 
diam¬ 
eter. 
Dry 
mat¬ 
ter. 
Water. 
Nitro¬ 
gen* 
Ash.* 
Wet 
weight. 
Dry 
mat¬ 
ter. 
Water. 
Nitro¬ 
gen. 
Ash. 
July 26...... 
Mm. 
9.4 
Mm. 
3 -o 
Mm. 
1.8 
37-5 
62.5 
2.81 
2. 2 
Mgm. 
32.4 
Mgm. 
12. 2 
Mgm. 
20. 2 
Mgm. 
0. 25 
Mgm. 
0. 26 
27. 
9.8 
3-3 
2.1 
38.9 
61.1 
2.21 
2. 2 
41.1 
16.0 
25-1 
•34 
•36 
28. 
9.8 
3-3 
2. 2 
39 - 2 
60.8 
2.22 
2.1 
42.7 
16. 7 
26.0 
•37 
•35 
29. 
9 - 7 
3-3 
2.2 
40. 2 
59-8 
2.68 
1-9 
40. 7 
16.3 
24.4 
•44 
• 3 i 
30 . 
9.0 
3-5 
2-3 
41. 7 
58.3 
2.37 
1.9 
46.8 
19-S 
27 -3 
•45 
•38 
31 . 
8.8 
3-4 
2.3 
37-4 
62.6 
3 - 79 
3.4 
44-9 
16. 8 
28. 1 
•50 
•49 
Aug. 1 . 
8.6 
3*3 
2. 2 
47-5 
52 -S 
2. 27 
1.9 
42.0 
20.0 
22. 0 
•47 
•36 
2. 
8.6 
3-4 
2-4 
49. 1 
50-9 
2.45 
1-9 
Si-1 
25-1 
26. 0 
•59 
• 5 ° 
3 . 
8-3 
3-4 
2-3 
49.8 
50- 2 
2.88 
1.6 
44.1 
22.0 
22. 1 
.58 
•38 
4-- • 
8.5 
3-4 
3-4 
49.0 
51-0 
2-39 
3 -i 
46. 7 
22. 9 
33-8 
.61 
•63 
5 . 
9.0 
3-6 
2. 6 
Si-8 
48. 2 
2.83 
2. 2 
55-9 
28.9 
27. 0 
•74 
• 70 
6. 
8.4 
3-4 
2-4 
Si -9 
48.1 
2.38 
2.6 
47-3 
24. 6 
22. 7 
•6 S 
•57 
7 . 
8-3 
3-4 
2.4 
SS-i 
44-9 
2.79 
1.6 
48. 0 
26. 4 
21. 6 
•78 
.40 
8 . 
8.4 
3-4 
2-S 
55 - 4 
44.6 
1- 7 
48. 2 
26. 7 
31-5 
.46 
PLOT 7 
July 29. 
9-3 
3- 2 
2.0 
43-6 
56-4 
3-04 
2. 0 
37-8 
16.5 
21.3 
0.51 
0.32 
30. 
8.8 
3-3 
2. 2 
46.1 
53-9 
2-37 
2.1 
42.1 
194 
22. 7 
•45 
•42 
31. 
8.6 
3-4 
2.4 
46. 6 
53-4 
2-43 
1.8 
45-6 
21. 2 
24-4 
•52 
• 3 * 
Aug. 1. 
8.8 
3-3 
2. 2 
47-9 
52.1 
2.63 
2.1 
44.6 
2 i -3 
23-3 
•57 
• M 
2. 
8.6 
3-3 
2-3 
48. 0 
52. 0 
3-oi 
1.9 
42.5 
20. 4 
22. I 
. 62 
• 3 S 
8. s 
1. 7 
43. 8 
22. 9 
20. 9 
• 3 < 
4 . 
8-7 
3-4 
2.3 
SO. 1 
49.9 
2- 77 
i- 7 
45-3 
22. 7 
22. 6 
•59 
.41 
5 . 
8- S 
3-4 
2.3 
Si-i 
48.9 
2. 61 
i -7 
46. 0 
23-5 
22. S 
. 66 
• 3 ; 
6. 
8-3 
3-2 
2-3 
53-1 
46.9 
2. 81 
2. 2 
42. 2 
22. 4 
19. 8 
• 62 
• 5 < 
7 . 
8.2 
3-2 
2.3 
55-2 
44.8 
2- 55 
2. 2 
44 - 1 
24.4 
19. 7 
. 68 
• 4 ? 
8. 
8.1 
3-2 
2.4 
57-3 
42. 7 
2-53 
1.6 
45 - 7 
26. I 
19. 6 
.66 
•42 
PLOT 8 
July 16. 
3 - 7 
1.4 
0.9 
22. 2 
77.8 
2. 74 
9-6 
4.0 
0.9 
3 - 1 
0.02 
0. 09 
17. 
4-7 
i -5 
.8 
22. O 
78.0 
2.40 
4.4 
5 - 9 
i -3 
4.6 
•03 
•07 
18. 
6.0 
1.6 
•9 
22. 2 
77-8 
2.36 
6.8 
7-3 
1. 6 
S- 7 
•03 
• 14 
19. 
8.0 
1.8 
1.1 
23 - 7 
76.3 
2.05 
4-5 
14.0 
3-3 
10. 7 
.07 
•13 
20. 
8.6 
2.0 
1-3 
24. 6 
75-4 
2.40 
3-8 
15-7 
3-9 
11.8 
.09 
. 16 
21. 
9-5 
2.1 
i -5 
25-3 
74 - 7 
1.87 
3-2 
19 -S 
4.9 
14. 6 
.09 
. 16 
22. 
96 
2.3 
1.6 
26.6 
73-4 
2. 62 
3-5 
22.6 
6.0 
16.6 
. 16 
. 21 
23. 
9.6 
2-5 
1.8 
299 
70.1 
2 -35 
3 -1 
27. 2 
8.1 
19.1 
. 20 
• 24 
24. 
9.6 
3 -o 
1.9 
34-9 
6s. i 
3-37 
2. 2 
33-4 
11. 7 
21. 7 
.29 
• 24 
as.. 
9 - 7 
2-9 
1.9 
36. 2 
63.8 
2. 10 
3 -o 
34-9 
12. 7 
22. 2 
• 3 i 
•33 
26.. 
9.8 
3-1 
2.0 
38.8 
61. 2 
2.19 
2-5 
37 -o 
14.4 
22. 6 
•32 
•36 
37. 
9 - 7 
3-2 
2.1 
39-4 
60.6 
2.32 
3-3 
40. 6. 
16.0 
24. 6 
•35 
.38 
28. 
9-7 
3-3 
2.0 
40.8 
59 - 2 
2. 84 
2. 6 
37-9 
15 -S 
22.4 
•43 
.41 
29. 
9.8 
3-3 
2.1 
44. 2 
55-8 
2.41 
2-3 
40.4 
17.9 
22. s 
•44 
.40 
30. 
8.8 
3-3 
2. 2 
46. 7 
53-3 
2.85 
2* S 
42-3 
19. 8 
22. s 
• 56 
•49 
3 i. 
8.8 
3-4 
2. 2 
46. 8 
53-3 
2.49 
2. 2 
43-9 
20. 5 
23-4 
•Si 
•45 
Aug. 1. 
8-5 
3-3 
2. 2 
48.9 
Si-1 
2.91 
2. I 
4 i -4 
20. 2 
21. 2 
. 62 
.40 
2. 
8.4 
3- 2 
3-3 
So. 9 
49.1 
2. 56 
2. O 
43-5 
22.1 
21.4 
•59 
•43 
3 . 
8.6 
3- 2 
2. 2 
53-1 
46.9 
2.86 
1-9 
42.4 
22. 4 
20. 0 
.68 
.40 
4...... 
8.4 
3-3 
2. 2 
54 -o 
46. 0 
2.86 
z. 6 
41. 6 
22. 4 
19. 2 
•65 
•35 
5 . 
8.4 
3 -o 
2. 1 
62. 6 
37-4 
2. 69 
1.9 
34-6 
21. 6 
13-0 
. 61 
•39 
6. 
8.3 
2-9 
2.0 
64. 2 
35-8 
3.16 
2.0 
33-0 
21. 2 
11.8 
.67 
•43 
* On dry-matter basis. 
The length of kernel is not a very satisfactory index of development. 
As has been previously shown, the full length is attained within a few 
days after flowering and remains nearly constant during the remainder 
of the period of development. As the grain ripens, however, the loss 
29668°—21 - 3 
