INFLUENCE OF SPACING ON PRODUCTIVITY OF CORN. 7 
Table 3. — Influence of spacing on yield, weight of ear, and number of ears per plant in 
single-ear {Singleton) and prolific (Arlington) types of corn grown at San Antonio, 
Tex., in 1918, 1919, and 1920. 
Area occupied 
Number of 
Weight of dry ear corn 
(pounds). 
Number of 
Num 
Der of 
per plant 
plants per 
Yield 
ears 
per 
suckers 
(square feet j. 
row. 
Average 
per ear. 
plant. 
perp 
lant. 
Year. 
Per row. 
Per plant. 
Single 
Pro- 
Single 
Pro- 
Single 
Pro- 
Single 
Pro- 
Single 
Pro- 
Single 
Pro- 
Single 
Pro- 
ear. 
lific. 
ear. 
lific 
ear. 
lific. 
ear. 
lific. 
ear. 
lific. 
ear. 
lific. 
ear. 
lific. 
,4.10 
4.67 
132 
116 
59.3 
54.0 
0.449 
0.465 
0.468 
0.377 
0.% 
1.23 

0.090 
6.20 
5.87 
85 
92 
45.7 
46.7 
.538 
.508 
.508 
.459 
1.06 
1.11 
.030 

191S... 
8.00 
8.00 
68 
68 
41.2 
56.2 
.606 
.826 
.570 
.434 
1.06 
1.90 
.130 
.190 
i 14. 70 
14.00 
37 
39 
32.8 
45.0 
.886 
1.155 
.548 
.489 
1.62 
2.36 
.190 
.180 
15.86 
16.58 
34 
33 
27.2 
34.8 
.800 
1.055 
.542 
.407 
1.48 
2.59 
.260 
.180 
[20. 50 
19.50 
26 
28 
18.7 
32.0 
.720 
1.142 
.514 
.353 
1.40 
3.24 

.860 
f 8.32 
8.46 
65 
64 
38.7 
44.6 
.596 
.697 
.536 
.421 
1.108 
1.656 
.038 

1 12. 01 
12.59 
45 
43 
31.1 
37.5 
.692 
.872 
.520 
.441 
1.333 
1.975 

.046 
1919... 
1 14. 62 
14.24 
37 
38 
25.3 
34.2 
.684 
.901 
.495 
.463 
1.378 
1.949 
.081 
.053 
16.92 
16.40 
32 
33 
23.7 
28.8 
.741 
.874 
.485 
.400 
1.530 
2.180 
.031 
.091 
(21.61 
22.52 
25 
24 
16.0 
23.1 
.640 
.960 
.446 
.435 
1.440 
2.210 
.042 

f 4.51 
4.62 
120 
117 
44.0 
43.1 
.367 
.368 
.380 
.323 
.97 
1.14 
.083 
.026 
1 8.48 
8.48 
64 
64 
34.8 
39.3 
.544 
.614 
.536 
.397 
1.02 
1.55 
.031 
.078 
1920... 
\ 9.84 
10.40 
00 
52 
29.3 
38.3 
.533 
.736 
.524 
.408 
1.02 
1.81 
.291 
.192 
12. 60 
12.60 
43 
43 
27.5 
28.7 
.640 
.668 
.540 
.384 
1.19 
1.75 
.140 
.465 
18.00 
18.00 
30 
30 
19.2 
27.8 
.640 
.927 
.469 
.392 
1.37 
2.37 
.133 
.333 
Table 4. — Influence of spacing on yield, weight of ear, and number of ears per plant in 
single ear and prolific types of corn grown at the Arlington Experiment Farm, Rosslyn, 
Va., in 1917, 1918, 1919, and 1920} 
Weight of dry ear corn 
(pounds). 
Number 
Area, 
occupied 
of hills. 
Number 
Yield. 
Number Number 
of plants 
per plant 
of ears of suckers 


per hill. 
(square 
Average 
per plant, per plant. 
Y 
feet). 
per 
ear. 
Per hill. 
Per plant. 
Sin- 
gle 
ear. 
Pro- 
lific. 
5|a 
Single Pro- 
Single 
Pro- 
Single 
Pro- 
Single 
Pro- 
Single 
Pro- Single Pro- 
[20 
ear, line. 
ear. 
lific. ear. 
lific. 
ear. 
line. 
ear. 
lific, ear. lific. 
17 4 4 
2. 72 2. 72 
1.720 
1.890 0.430 
0.472 
0.454 
0.287 
0.95 
1.65 0.012 
1917.. 
20 
20 3 3 
3.63 3.63 
1.500 
1. 562 . 500 
.521 
.517 
.292 
.96 
1.78 
21 
2(i 2 2 
5. 45 5. 45 
1.362 
1.548 .681 
.774 
.651 
.338 
1.05 
2.29 .095 .019 
123 
27 1 1 
10.90 
10.90 
.891 
. 940 . 891 
.940 
.732 
.343 
1.21 
2.74 .348 .553 
[30 
38 4 4 
2.72 
2.72 
.883 
1.010 .221 
.252 
.268 
.241 
.82 
1.05 .035 
191v.. 
37 
38 3 3 
3.63 
3.63 
1.017 
. 977 . 339 
.326 
.372 
.283 
.91 
1.15 .050 
28 
40 2 2 
5.45 
5.45 
1.017 
1. 025 . 509 
.513 
.518 
.315 
.98 
1.(12 .035 .100 
139 
39 1 1 
10.90 
10.90 
.813 
.920 .813 
.920 
. 773 
.421 
1.05 
2. 18 . 025 
[37 
29 4 4 
2.72 
2.72 
1.960 
1.960 .490 
.490 
.475 
.304 
1.03 
1.61 .027 
138 
1919.. 
|33 
32 3 3 
3.63 
3.63 
1.770 
1. 850 . 590 
.616 
.590 
.331 
1.00 
1.87 .033 
.094 
40 
35 2 2 
5.45 
5.45 
1. 392 
1.717 .696 
.858 
.705 
.364 
.99 
2.36 

138 
34 1 1 
10.90 10.90 
.728 
1.245 .728 
1. 2-15 
.655 
.399 
1.10 
3.12 .052 

[22 
39 4 4 
2. 72 2. 72 
1.836 
2.020 .459 
.505 
.470 
.332 
. .98 
1.51 .091 
026 
131 
34 3 3 
3. 63 3. 63 
1. 354 
1.620 .451 
. 540 
.483 
.326 
.93 
1.66 .581 
. 17-', 
136 
39 2 2 
5. 45 5. 4.-. 
1.233 
.1.764 .617 
.882 
.510 
.391 
1.21 
2.26 1.333 
. 462 
[33 
39 1 1 
10.90 10.90 
. 836 
1.253 .836 
1. 253 
■° 13 
.391 
1.35 
3.18 1.333 
1 In 1917, 1918, and 1919 the single-ear variety was the Wilson, and in 1920 it was the Delaware White- 
Cap. Biggs Seven-Kar was the prolific variety used in each of the four years. 
