s 
TABLE 1. RESLTLTS ON PORTER’S CLAY. CHAS. BALDWIN’S FARM, BLANTYRE, 
TRANSYLVANIA CO., N. C. 
Plat 
No. 
TREATMENT 
Yield per Acre 
Increase 
Grain, 
Bushels 
Stover, 
Pounds 
Grain, 
Bushels 
Stover, 
Pounds 
1 
None.. ... . 
23.1 
1590 
2 
Lime (CaO).. . _ . 
28.4 
2030 
5.3 
440 
3 
Nitrogen_ .. . _ 
26.7 
2020 
3.6 
430 
4 
PhosDhoric Acid_ . ... 
39.0 
2200 
15.1 
860 
5 
Potash___ 
19.7 
1180 
—4.2 
—160 
6 
None..___ . 
23.9 
1340 
7 
Nitrogen, Phosphoric Acid_ 
55.0 
3360 
31.1 
2020 
8 
Nitrogen, Potash. .. .. 
28.7 
2810 
4.9 
1470 
9 
Phosphoric Acid, Potash_ .. 
40.1 
2130 
15.7 
780 
10 
Nitrogen, Phosphoric Acid, Potash. 
52.7 
3240 
28.3 
1870 
11 
None__ . 
24.4 
1370 
12 
Lime, Nitrogen, Phosphoric Acid, Potash 
59.8 
3850 
35.4 
2480 
Average gain for Nitrogen.. 
| 
10.3 
1128 
Average gain for Phosphoric Acid. 
22.0 
895 
Average gain for Potash. 
— .85 
110 
Average gain for Lime (CaO). 
6.2 
525 
These results certainly indicate that phosphoric acid is needed first 
on this soil. Acid phosphate alone gave an increase of over fifteen 
bushels per acre. Nitrogen alone gave an increase of only 3.57 bushels, 
but when applied in addition to phosphoric acid it gave an increase of 
sixteen bushels, nearly one bushel more than did phosphoric acid over 
no fertilizer. Potash alone gave a smaller yield than no fertilizer, 
very little increase when applied in addition to nitrogen or phosphoric 
acid separately, and a decrease in the addition of these together. 
TABLE 2.—CHEMICAL AND MINERALOGICAL COMPOSITION OF 
Labora¬ 
tory- 
Number 
Depth 
to 
Which 
Sample 
Was 
Taken 
Pounds op Total Plant Food 
Constituents per Acre 
Surface, 6 2-3 inches_2,000,000 lbs 
Subsoil, 28 inches..8,000,000 lbs 
N 
Soil 
1187 
Subsoil 
1188 
Inches 
0-8 
10-36 
1,055 
2,012 
P2O5 
K2O 
618 
8,742 
12,312 
CaO 
Minerals Other 
than Quartz in 
Sand 
1,419 
Fervent. 
29 
102,182 7,562 
Silt 
Abundant Minerals 
Sand 
Percent. 
33 
27 
36 
Biotite, muscovite, 
orthoclase. 
Biotite, orthoclase, 
muscovite, epidote. 
