10 
The following table gives the treatment and yields of corn in 1910: 
TABLE 3. RESULTS ON PORTER’S SANDY LOAM. B. W. MARSHALL’S FARM, 
HENDERSONVILLE, HENDERSON CO., N. C. 
Plat 
No. 
TREATMENT 
Yield per Acre 
• 
Increase 
Grain, 
Bushels 
Stover, 
Pounds 
Grain, 
! Bushels 
Stover, 
i Pounds 
1 
None_ 
22 6 
1680 
2 
Lime (CaO)_ 
35.7 
2400 
13.1 
720 
3 
Nitrogen_ 
39.1 
3160 
16.5 
1480 
4 
Phosphoric Acid_ 
20.6 
1680 
—2.0 
0 
5 
Potash__ 
20.6 
1760 
—2.3 
240 
6 
Nitrogen, Phosphoric Acid. 
53.7 
2840 
30.8 
1320 
7 
Nitrogen, Potash.. 
37.1 
2400 
14.2 
880 
8 
None___ 
22 9 
1520 
9 
Phosphoric Acid, Potash.... 
27.3 
2280 
4.4 
760 
10 
Nitrogen, Phosphoric Acid, Potash. 
64.3 
3840 
41.4 
2320 
11 
Lime, Nitrogen, Phosphoric Acid, Potash.. 
70.3 
3920 
47.4 
2400 
Average gain for Nitrogen. 
25.8 
1210 
Average gain for Phosphoric Acid.. 
11.6 
410 
Average gain for Potash_ 
3.3 
270 
Average gain for Lime (CaO).. 
9.6 
400 
There is a striking difference in the results on this field compared 
to those on the Blantyre field. Here we find no apparent gain from 
phosphoric acid alone, hut nitrogen alone gave an increase of 16.5 
bushels. When phosphoric acid was applied in addition to nitrogen 
we find it gave a large increase. Here, as at the Blantyre field, 
we. find phosphoric acid and nitrogen gave the largest increase, but 
their relative importance is reversed. Potash alone or in combina- 
TABLE 4.—CHEMICAL AND MINERALOGICAL COMPOSITION OF 
Labora¬ 
tory 
Number 
Depth 
to 
Which 
Sample 
Was 
Taken 
Pounds of Total Plant Food 
Constituents per Acre 
Surface, 6 2-3 inches....2,000,000 lbs. 
Subsoil, 28 inches.8,000,000 lbs. 
Minerals Other 
than Quartz in 
Abundant Minerals 
N 
P2O5 
IGO 
CaO 
Sand 
Silt 
Sand 
Soil 
1189 
Inches 
0-7 
418 
605 
34,375 
16,750 
Percent. 
36 
Percent. 
43 
Muscovite, biotite, 
orthoclase, epidote 
Subsoil 
1190 
9-36 
1,524 
2,494 
75,280 
54,034 
44 
46 
Muscovite, biotite, 
epidote, orthoclase 
