Atlanta semi-weekly journal. (Atlanta, Ga.) 1898-1920, 1910-03-11

of soda, though some might prefer
mixed fertilizer. Truck crops of all kinds
generally require forcing, and nitrogen
is the most important element in produc-
ing uniform and rapid growth. such
as you would desire to secure in de-
veloping crop of early cucumbers so as
to get them on the market as soon as
possible The nitrate in this case may be
used in light applications, say 100 pounds
per acre Some truckers use as high as
several hundred pounds during a sea-
son. The amount to use will depend upon
local conditions and the market price pre-
vailing for the crop. AS a rule, 200
pounds of nitrate is about the heaviest
top dressing which seems to have given
a profit on cereals and field crops. though
twice this amount is often used by truck-
ers with profit.
The fertilizer to which you refer would,
according to the Georgia valuation OF
$3.50 per unit for nitrogen, 20 cents per
unit of available phosphoric acid and 80
cents per unit of available potash be
worth about $26.S5 per ton. To this should
be added $3.50 for mixing, bagging, in
spection tags, etc, making about $29.45
per ton.
ANTHRACNOsE OR BOIL ROT OF
COTTON.
Please, tell me how much potash is need
ed fol my red land? The cotton does
not make weed enough, I am thinking
of mixing one sack of cotton-seed meal,
and one sack of Is per cent acid phos-
phate and muriate of potash. My cotton
does not rust but it. has some rotton
hollis and locks which I think are caused
by too much potash. l have been using
a 2-10-2 guano and do not like 1t.
The fact that your land does not make
sufficient weed is an evidence that 1t
needs vegetable matter and that you
need to use more nitrogen in your fer
tilizer. You do not state how much you
applied per acre last year, but 200 to
300 pounds of a 2-10-2 fertilizer would be
regarded as a light application of plant
food to soils that are naturally in bad
physical condition. What you should do
is to arrange to rotate your land and
grow legumes on the soil so as to have
a residue of nitrogen left therein, and
at the same time secure the mechanical
Improvement of the land through the re-
fuse plowed under. In the meantime we
would advise you to apply mixture as
follows: 1850 pounds of high-grade acid
phosphate. 500 pounds of eotton-seed meal
containing at least Sis per cent of nitro
cen, 25 per cent of phosphoric acid, and
15 per cent of potash, 200 pounds OF
nitrate of soda, and $50 pounds of muri-
ate of potash. This mixture will con-
tain approximately 6S.4 pounds of nitro
gen, 1888 pounds of phosphoric acid, and
S4 pounds of potash. It's percentage COM
position will be "a per cent of nitrogen,
81 per cent of phosphoric acid, and A.
per cent of potash. This fertilizer should
be used at the rate of 500 to 600 pounds
per acre. and if it is found along in June
that your crop is not making salts
factory development, tOp-dress it with
$50 pounds of nitrate of soda.
The rotting of the bols to which you
refer is not due to the use of potash. Pot
ash is helpful on land on which cotton
rusts, and will have no injurious effect on
the development of the bolls even If ap-
piled i'm excessive quantity. What you are
troubled with is what is known as an
thracnose or boil rot. This disease devel-
OBS as a result of the introduction of a
spore into the land which remains in the
soil probably from year to year You
should therefore, select your seed in the
future from plants which are free from
this trouble or in other words, immune
to the disease. We are at present trying to
develop a strain of Cooks cotton on the
college farm immune to anthracnose and
excellent progress has been made. This !
disease causes untold loss to the farmers /
of Georgia every year, and unfortunately, |
most of them are doing little to fight it. !
HOR BLACK SANDY
SOILS.
r. Z. B., Vidalia, Ga, writes: 1 have d !
lot of black sandy new ground with Il /!
good clay subsoil. 1t has been broken just
a year. Which is the best guanO for it !
9-2-3 or q 9-1-4, and how much should be .
used per acre?
Of cotton in the vicinity of your farm. If 2
It has made plenty of weed, then it will be !
best to use a 1874 fertilizer, since not
much nitrogen is needed. just enough, for
TO give the crop a good send