12 
BULLETIN 1180, U. S. DEPARTMENT OF AGRICULTURE. 
when seeded and the remainder one month later. Where the ferti- 
lizer was applied after planting, the material was distributed by hand 
in the furrows left by the cultivator used for the second cultivation. 
The distance varied from 6 to 12 inches from the row. The fertilizer 
was then mixed with the soil by means of a spring-tooth cultivator. 
Table 4 gives the yields from the various plats. 
Table 4. — Yields per acre of cotton and com from Section II of field No. 1. 
Fertilizer ratio. 
Application 
of nitrogen. 
With 
seed. 
One 
month 
later. 
Plat 
Yields of seed cotton 
(pounds). 
Actual 
Aver- 
In- 
crease 
over 
check. 
Plat 
Yields of corn. 
Stalks 
(lbs). 
Grain (bushels). 
Actual. 
Aver- 
age. 
Increase 
over 
check. 
Series A.— Am- 
monium nitrate: 
0-0-0. 
0-8-0. 
4-8-0. 
4-8-0. 
4-8-0. 
All... 
Half.. 
4-0-0 
Series B.— Sodi- 
um nitrate: 
Half.. 
All... 
All... 
0-0-0. 
0-8-0. 
4-8-0. 
4-8-0. 
4-8-0. 
All.. 
Half. 
4-0-0 
Series C— Cyana- 
mid: 
0-0-0 
Half. 
All.. 
All.. 
0-8-0. 
4-8-0. 
4-8-0. 
4-8-0. 
4-0-0. 
All... 
Half.. 
Half.. 
All... 
All... 
310 
338 
840 
990 
1,358 
1,382 
1,230 
1,405 
1,040 
1,310 
190 
275 
308 
653 
608 
1,068 
1,220 
1,125 
1,220 
863 
1,070 
60 
283 
1,300 
1,163 
1,228 
985 
1,300 
1,110 
1,118 
988 
193 
324 
915 
1,370 
1,318 
1,175 
190 
| 292 
j- 631 
} 1,144 
} 1,173 
| 967 
60 
283 
} 1 232 
} 1,107 
| 1,205 
} 1,053 
193 
455 
403 
2C0 
2,380 
1,760 
3,220 
2,820 
2,960 
2,780 
2,840 
2,260 
1,300 
513 
542 
1,520 
120 
320 
340 
2s0 
220 
S.S0 
'.ISO 
500 
520 
-125 
170 
1,240 
2,400 
2,780 
3,540 
3,360 
3,400 
3,000 
3,320 
2,820 
780 
31.1 
22.9 
40.0 
35.7 
46.6 
38.6 
44.9 
34.3 
15.1 
7.4 
22.0 
26.0 
46.6 
47.4 
48.9 
43.1 
43.1 
38.3 
7.4 
25.7 
33.4 
42.3 
40.0 
42.9 
41.4 
43.4 
40.0 
4.9 
27.0 
37.9 
42.6 
39.6 
15.1 
7.4 
24.0 
47.0 
46.0 
40.7 
7.4 
29.6 
41.2 
42.2 
41.7 
4.9 
10.9 
15.6 
12.6 
23.0 
22.0 
16.7 
11.6 
12.6 
12.1 
In considering the results it is necessary to emphasize the wide 
variations in the natural fertility of the soil on different portions of 
the field. This accounts for most of the irregularities shown by the 
figures in Table 3. Ammonium nitrate again gave responses similar 
to sodium nitrate, although the increases in yields were not quite as 
large. Cyanamid was a very unsatisfactory fertilizer, for the reasons 
already given. From the standpoint of time of application there was 
no great difference in the yields whether all or only half of the fer- 
tilizer was applied with the seed. Where no fertilizer was applied 
with the seed the yields were nearly always lower. This emphasizes 
the necessity of having sufficient nitrogen available for seedlings to 
give them a rapid start. 
