23 
ES OF CECIL CLAY LOAM, IREDELL TEST FARM. 
rals in 
Less Abundant Minerals in 
Remarks 
Silt 
Sand 
Silt 
Altered biotite, mus¬ 
covite, zircon 
Epidote, plagioclase, 
hornblende, rutile, 
zircon, magnetite, 
sillimanite, chlorite 
microcline 
Chlorite, plagioclase, 
rutile, magnetite, 
epidote 
Minerals show signs of having 
been badly leached. Much 
quartz carrying infiltrated 
iron oxide. Biotite shows 
alteration especially in the 
silt. Orthoclase badly 
weathered. 
Weathered orthoclase, 
muscovite 
Epidote, hornblende, 
chlorite, plagioclase, 
magnetite, rutile 
zircon. Included 
apatite 
Epidote, plagioclase, 
chlorite, magnetite, 
rutile, zircon 
Much quartz carrying infil¬ 
trated iron oxide. More 
orthoclase and muscovite 
than in soil. Biotite badly 
altered. 
harvested and weighed with the plat. Bur clover was sowed in Field B 
at the last cultivation of corn in 1908 and of cotton in 1909, but as 
bur clover failed in 1909 the plats were seeded to crimson clover early 
in November. 
Field A .—The plats were used for fertilizer experiments with cotton 
in 1903, ’04, ’06, ’08, for fertilizer experiments with corn in 1905, 
’07, ’09. In the case of the two crops the same plan or system of fer¬ 
tilization was followed. By this is meant that, plat 8 in all cases 
received only nitrogen and potash, plat 9 only phosphoric acid and 
potash, and so on, though the quantities actually applied varied with 
the two crops. The fertilization of the cotton plats was based on a 
normal application of 400 pounds per acre of a mixture containing 
7 per cent available phosphoric acid and 2% per cent each of nitrogen 
and potash. The fertilization for corn was on a basis of 300 pounds 
per acre of a mixture containing 7 per cent available phosphoric acid, 
3 per cent nitrogen, and 1% per cent potash. 
Field B .—These plats were used for fertilizer experiments with corn 
in 1906 and 1908 and for fertilization experiments with cotton in 1905, 
’07, ’09. 
Fertilizer Materials Used. 
N equals nitrogen at the rate of 10 pounds per acre, or 77 
pounds of 13 per cent dried blood; 
P equals phosphoric acid at the rate of 28 pounds per acre, 
or 200 pounds of 14 per cent acid phosphate; 
K equals potash at the rate of 10 pounds per acre, or at 
the rate of 50 pounds 20 per cent manure salt; 
L equals lime at the rate of 500 pounds rock or 1,000 pounds 
slaked lime per acre. 
