6 
N. C. AGRICULTURAL EXPERIMENT STATION. 
TABLE I. The Available Phosphoric Acid in Some Raw Fertilizer 
Materials. 
Laboratory Number. 
Fertilizer Material. 
TOTAL 
BY METHOD 
SOLUBLE 
BY METHOD 
INSOLUBLE 
BY METHOD 
Avail’ble,20-mesh seive 
> 
•pH 
03 
0Q 
-a 
CO 
03 
a 
© 
CO 
3 
• pH 
oS 
> 
< 
r-H 
O 
M 
a 
ee 
CO 
o 
£ 
M 
S3 a 
O cfl 
-a 
a «a .. 
.2 o 
SO 
i—i 
a 
.3 
•pH 
a 
•p* 
o 
a> 
s- 
o. 
4— 
o 
Qj 
f-i 
Q 
a a'g 
o o a 
a ® 
>0 
.1 
| §.s _» 
S'* §z 
"go 
a a „ 
.2"" O 
.9 j 3 "C 
o73 a 
a t» a 
i—i 
1.5 • 
: aO 
offi 
i—i a 
1 O o3 
03 
« 
-l- 3 O 
o ^ 
t £ 
5" 
Fish Scrap. 
Prct 
Pr ct 
I -+0 
1 
*• 
Prct 
Pr ct 
Prct 
Prct 
o 
421 
Fish scrap through 20 
mesh seive. 
7.52 
7.54 
.74 
.92 
4.28 
4.31 
3.24 
422 
Same sample through 40- 
mesh seive__ 
7.71 
7.65 
.78 
.99 
4.25 
4.22 
3.45 
461 
Fish scrap through 20- 
■r' 
mesh seive_ 
6.78 
6.83 
.38 
.47 
3.99 
3.91 
2.85 
436 
Same sample through 40- 
' 
mesh seive... 
6.65 
6.69 
.49 
.55 
3.91 
3.86 
.... 
2.79 
Average .... 
7.16 
7.18 
.60 
.73 
4.11 
4.07 
3.04 
3.12 
Tankage. 
I 
415 
Tankage through 20-mesh 
i 
seive.. 
10.81 
35 
.51 
6.88 
6.75 
4.00 
416 
Same sample through 40- 
mesh seive._. 
10.90 
10.82 
.54 
.70 
6.78 
6.72 
4.11 
423 
Tankage through 20 mesh 
seive___ 
10.23 
10.22 
.38 
.37 
5.71 
5.66 
4.54 
424 
Same sample through 40- 
mesh seive... 
10.36 
10.30 
.37 
.42 
5.72 
5.70; 
— 
4.62 
Average.. 
10.49 
10.54 
.41 
.50 
6.27 
6.21 
4.27 
4.36 
6998 
Tankage... 
M 
15.61 
9.39 
6.22 
6999 
Tankage.. 
14.99 
-- 
- -- 
9.08 
5.91 
Average of all.... 
12.41 
— 
— 
7.22 
5.17 
Beef Azotin. 
417 
Beef azotin through 20- 
mesh seive.. 
5.33 
5.41 
.64 
.70 
2.88 
2.79 
2.54 
418 
Same sample through 40- 
mesh seive. 
5.39 
5.27 
.67 
.65 
2.75 
2.84 
.... 
2.54 
Average.... 
5.36 
5.34 
.65 
.67 
2.81 
2.81 
2.54 
2.54 
Pork Azotin. 
419 
Pork azotin through 20- 
mesh seive... 
1.15 
1.22 
.75 
.73 
.22 
.23 
.96 
420 
Same sample through 40- 
- 
mesh seive. 
1.19 
1.25 
.75 
.77 
.17 
.18 
.... 
1.05 
1 
Average..^ 
1.17 
1.23 
.75 
.75 
.19 
.20 1 
.96 
1.05 
