Atlanta semi-weekly journal. (Atlanta, Ga.) 1898-1920, 1912-04-05

would hardly undertake to recommend
them for your locality. No doubt you
will find seed of the varieties suggest
ed advertised and it will be we'll for
you to communicate with farmers or
seedsmen who have them for sale.
SUITABLE FORMULAS FOR NORTH
GEORGIA,
r. c. S., Gainesville, Ga, writes:
What will be the analysis of 1900
pounds of 16 per cent acid. 500 pounds
of 6.1S per cent cotton seed meal, and
200 pounds of muriate of potash? Is
an Slid or an S-1-6 a we'll proportional
fertilizer? Does blood guano have any
advantage over cotton seed meal goods?
Is nitrogen derived from cotton seed
meal as good as derived from other
sources, and is there a difference in
the cost of nitrogen derived from diff
ferent sources? What ought muriate of
potash to cost and what is the percent
age of potash in muriate of potash?
mixture of 1900 pounds of Is per
cent acid, 500 pounds of cotton seed
meal containing 6.1S per cent nitrogen,
and 200 pounds of muriate of potash
would contain per ton about 204 pounds
of phosphoric acid, 81 pounds of nitro
gen, and 100 pounds of potash. The
percentage formula would be about 1912
per cent of potash. This fertilizer
would probably be a little higher in
potash than is needed on most red clay
lands in north Georgia, and possibly a
little lower in nitrogen than is advis-
able to use for either corn and cotton.
In our opinion you will find an s-3-3
excellent for cotton, and about a 93-4
satisfactory for corn. Probably one
should use about 200 pounds more fer
tilizer under the corn as under the cot
ton as corn is a grosser feeding plant
and requires a larger amount of avail
able plant food for its proper develop
ment. An S-1-4 or an S-1-6 would be
too low in nitrogen.
1t is difficult OF say what the advan-
tage of a blood guano might be with
out the composition Of the materials
entering into the mixture. For instance,
a formula might contain a very small
quantity of blood or a large quantity.
Blood is one of the best forms. of nitro
gen for use on ordinary farm crops. 1t
is rather quickly available, more so in
fact than the nitrogen in cotton seed
meal or some other carriers of this ele-
ment. The advisability of using blood
would depend very much on it's cost as
compared with cotton seed meal. The
IdCE lNdL the nitrogen III COllOI SOSO
meal is not so quickly available as in
blood does not make, the use of the
meal Objectionable. In fact, the meal
has many advantages in that the nitro
gen IL contains is in an organic form,
and therefore, while becoming quickly
enough available to meet the require
ments of long season crops, it is not
likely to be lost from the land by leach
ing or through fermentation.
There is variation in the cost per
pound of available nitrogen depending
on the source from which 1t is derived
For instance, if cotton seed meal sells
at $23 ton, and nitrate of soda at
! $50 a ton, you will find the nitrogen
in cotton seed meal cheaper than in the
nitrate of soda On the other hand, if
| you can buy nitrate of soda at about
| $4S to $50 a ton, there will be very
| little difference in the cost of the nitro
gen. These figures refer to a grade of
cotton seed meal carrying not less than
| SIS per cent of nitrogen, 2 per cent of
phosphoric acid and 1.5 per cent of
potash. To determine the relative cost
of the nitrogen in any given fertilizer
and to ascertain which is the cheapest,
it is necessary to know the cost price
per ton, the percentage of available
plant food carried per ton, and then
determine the actual cost per pound,
and make the necessary comparisons.
There are times naturally when nitrate
of soda at $50 a ton might be cheaper
than cotton seed meal at $23 a ton. If
one desires a quickly available form of
nitrogen for use as top dressing, nat
urally the nitrate of soda is preferable
| to the cotton seed meal. Where one
i expects to use the fertilizer under the
drill row, or where the crop has a long
season in which to develop, the cotton
seed meal would likely be preferable.
The cost of muriate of potash varies,
4 and you will probably have to pay from
$40 to $50 a ton, depending on the guam
tity bought, the distance from seaboard,
freight rates, and whether you pay cash
or not. High grade muriate of potash
contains so per cent of available pot
ash.
/ CHI rrrNr A rrTONr SWININT POTA =