ATMOSPHERIC-XITROGEX FERTILIZERS. 
11 
changed to dicyanodiamid. The latter material is not only unavail- 
able as a fertilizer but is toxic for some crops and delays the nitrifica- 
tion of the soil organic matter or of any nitrogen added as a fertilizer. 
Furthermore, in mixtures of cyan amid and acid phosphate, such as 
were used in these experiments, there occurs a reversion of the phos- 
phorus to a less available form. 
Table 3. — Yields per acre of cotton and corn from Section I of field No. 1. 
Plat. 
Yields of seed cotton 
(pounds). 
Plat. 
Yields of corn. 
Fertilizer ratio. 1 
Actual. 
Average. 
Increase 
over 
check. 
Stalks 
(pounds). 
Grain (bushels). 
Actual. 
Average. 
Increa e 
over 
check. 
Series A. — Ammo- 
nium nitrate: 
0-0-0 
150 
713 
765 
1,273 
1,087 
1,250 
1,230 
1,362 
1,353 
293 
818 
905 
1,110 
1,280 
1,353 
1,405 
1,430 
1,380 
/ 225 
\ 473 
1,115 
980 
1,208 
1,205 
1,113 
1,155 
548 
832 
1 
150 
} 739. 
} 1,180.0 
I 1,240.0 
> 1,357.5 
293 
} 861.5 
j> 1, 195. 
J 1, 379. 
J 1,405.0 
} 349. 
j 1,047.5 
| 1,206.5 
} 1,134.0 
f 690. 
760 
1,960 
1,760 
2,600 
2,500 
2,800 
2,620 
2,560 
2,880 
8.0 
20.6 
18.6 
27.4 
29.7 
34.9 
37.4 
33.4 
39.1 
8.0 
} 19.6 
j 28.6 
| 36.2 
| 36.3 
0-8-0 
/ J 
J 9 
I 13 
/ 10 
I 14 
f 11 
1 15 
r 12 
\ 16 
2-s-O 
4-&-0 
8-8-0 
i 
! 1 
441.0 
501.0 
618.5 
9.0 
16.6 
16.7 
Series B.— Sodium 
nitrate: 
0-0-0 
I 8 
0-8-0 
/ 1 
\ 5 
J ~2 
\ 6 
J 3 
I 7 
J * 
\ 8 
J 9 
1 13 
J 10 
1 14 
J u 
1 15 
J !2 
t 16 
2,480 
2,260 
3,200 
2,920 
3,040 
3,440 
3,600 
2,800 
31.4 
30.3 
39.4 
33.7 
44.6 
46.9 
54.3 
44.6 
} 30.9 
| 36.6 
} 45.8 
J 49.5 
2-8-0 
333.5 
517.5 
543.5 
5.7 
4-8-0 
14.9 
8-8-0 
18.6 
Series C — Cyana- 
mid: 
0-0-0 
0-8-0 
/ 1 
\ 5 
J 2 
1 6 
J 3 
1 7 
J 4 
I 8 
/ 9 
\ 13 
J 1° 
1 14 
J 11 
I 15 
1 12 
\ 16 
2,400 
1,580 
2,680 
1,900 
2,360 
2,360 
2,120 
1,920 
26.9 
17.7 
24.9 
17.4 
32.0 
27.1 
30.6 
28.6 
} 22.3 
] 21.2 
j 29.6 
} 29.6 
2-8-0 
159.0 
86.5 
—357.5 
-1.1 
4-8-0 
7.3 
8-8-0 
7.3 
1 The term "fertilizer ratio" used in Tables 3 to 7, inclusive, refers to the percentages of N, P 2 0;,,and 
K2O per acre, in the order named. The applications were made at the rate of 1,000 pounds per acre. 
It is quite evident, therefore, that no particular weight should 
be attached to these yields with cyanamid, used under conditions 
that are known to be unsatisfactory. They are, nevertheless, valu- 
able in demonstrating that cyanamid should not be used in large 
proportions in fertilizer mixtures containing acid phosphate. 
TIME-OF-APPLICATION STUDIES WITH AMMONIUM NITRATE, SODIUM NITRATE, AND 
CYANAMID ON COTTON AND CORN. — SECTION II. 
In order to determine the best time to apply the nitrogenous 
fertilizers, a series of plats was planted to cotton and corn, some 
plats receiving the nitrogen in the row at the time of seeding, others 
one month later, and a third group receiving half of the fertilizer 
