9 
Lime gives fair increase, either alone or in addition to a complete 
fertilizer, the gain over no fertilizer being at the rate of 5.3 bushels, 
and in addition to all these elements at the rate of 7.1 bushels, making 
an average of 6.2 bushels per acre. This would indicate that lime 
could be used at a profit on this soil. 
While it is not safe to draw definite conclusions from one season’s 
work, the marked benefit of phosphoric acid and nitrogen certainly 
justifies the assumption that the phosphoric acid and nitrogen supply 
must he increased in order to produce large crops permanently. 
A study of Table Ho. 2 will certainly aid in the interpretations of 
the results obtained from this field. 
The surface 6% inches of this soil contains enough potash for nearly 
375 one-hundred bushel corn crops. This potash is principally in the 
form of biotite and muscovite, there is some orthoclase in the sand par¬ 
ticles, but the silt is mainly micas. Twenty-five such crops would, if 
all the phosphoric acid was available, require an amount of phosphoric 
acid equal to the total amount existing in the surface 6% inches. The 
mineralogical analysis shows that much of this phosphoric acid is in 
the form of inclusions in quartz,' and that it is exceedingly doubtful if 
the plant can obtain this phosphoric acid at all. The nitrogen supply 
for one-hundred bushel crops is limited to about twelve years. Lime 
in this soil is principally in the form epidote, there is, however, some 
hornblende present. 
Results on the Hendersonville Field. 
The Hendersonville Field is located on typical Porter’s sandy loam 
and is exceptionally uniform throughout. There are eleven plats in 
this field, the nine fertilized ones receiving the same treatment as the 
corresponding ones on the Blantyre Field. This field, too, was estab¬ 
lished in the spring of 1910, and corn was grown the first year. 
PORTER’S CLAY, BLANTYRE, HENDERSON COUNTY. 
Other than Quartz in 
Less Abundant Minerals in 
Remarks 
Silt 
Sand 
Silt 
Biotite, muscovite, 
Epidote, hornblende, 
zircon, rutile, 
microcline, apatite, 
as inclusions in 
quartz 
Epidote, chlorite 
hornblende, rutile, 
zircon, magnetite, 
microcline 
Biotite is altered and fresh. 
Orthoclase is fresh.f Some 
secondary quartz. 
Biotite, muscovite, 
orthoclase 
Chlorite, hornblende, 
rutile, zircon 
Chlorite, hornblende, 
rutile, zircon, 
microcline, mag¬ 
netite 
Biotite badly altered. Ortho¬ 
clase shows signs of weather¬ 
ing. 
