2G8 
Goodrich35” 
CUNCHER FABRIC TIRE 
A low-priced, High 
Quality Tire especially 
adapted to the require¬ 
ments of the farmer 
This popular Goodrich 
Tire has demonstrated 
its worth and quality 
in every section of the 
country and under all 
road and weather con¬ 
ditions. 
It has a thick, anti¬ 
skid tread of specially 
toughened rubber and 
rut resisting side walls. 
This is the tire for 
Fords, Chevrolets and 
other popular light 
weight cars. 
Your dealer has it. 
30 * 3 % 
abo made in 30x3 
^o/e; We also make the fa¬ 
mous Goodrich Silvertown Cord 
in the 30 x 3i size in clincher 
and straight side. 
B. F. GOODRICH RUBBER CO. 
Akron, Ohio 
‘BEST IN THE LONG RUN” 
Post Your 
Farm 
and Keep T espsssersOff 
We have printed on 
linen lined board trespass 
notices that comply in all 
respects to the new law 
of New York State. We 
unreservedly advise land 
owners to post their 
farms. We have a large 
supply of these notices 
and will send one dozen 
to any subscriber for 60 
cents. L'^rger quantities 
at same rate. Address: 
AMERICAN AGRICULTURIST 
461 4th Ave., New York City 
No Other 
Mixer I 
Like M 
Sxptdios Two 
HreatgAiMixer 
Improvenienis 
American Agriculturist, Mareh 24, ifiss 
How Much Shall W e Apply ? 
A Review of the New Jersey Potato Fertilizer Tests 
a Batch a Minute 
As pioneer mixer 
manufacturers we 
have developed two ^ 
features that put tiie'" 
Gilson Mixer in a 
class of its own. It is the only mixer with Patent¬ 
ed Reverse Unloading Gear and Curved 
Mixing Blades, insuring thorough mixing in 
sliortest time. Loads on one side, dumps on 
the other side. 
30 Days 
FREE 
y cTorrcrete M//rer ^ Easy Terms 
Due to the special Curved Mixing Blades the 
Gilson thoroughly mixesin K the time required 
by the ordinary type of mixer. Handles 2}4 to 
3 cubic feet of concrete at onetimeatther ate of one batch 
per minute. Turns out 34 cubic yards in ten hours. Mixes 
perfectly concrete, mortar or plaster. Any 1 H. P. Engine 
turns i t easily. 
Only 343.50 
The lowest priced, practical, improved mixer made. Built 
of iron and steel—lastsalifetime. Idealforfarmer or con¬ 
tractor. Mixes concrete that requires no replacements, 
no repairs. Use this mixer 30 
days at our risk. We guarantee 
it exactly as represented. Send 
your namet oday and getf ull 
description of this, the only 
Reverse Unloading Gear 
Mixer, and easy payment plan. 
Gilson Mixer Co. 
723 7th Avenue 
West Bend, Wisconsin 
N ew jersey is 
now using close to 
$5,000,000 worth of commercial fertil¬ 
izers annually. Probably about one- 
half of this is spent for potato fertil¬ 
izers. With the potato industry of the 
State demoralized as it is to-day, farm¬ 
ers are examining every phase of the 
question in a way that they have never 
done before. This keen interest on the 
part of the farmer makes the results 
of fertilizer tests, which have been con¬ 
tinued for a period of years, of un¬ 
usual importance. If they have been 
using too much fertilizer they want 
to know it, so that they may make a 
reduction in the v 
amount and 
thus help to put 
the bank account 
On the right 
side of the bal¬ 
ance sheet. I f 
they have not 
been using 
enough they are 
equally anxious 
toknow how 
much they 
should increase 
their treat- 
ments. 
The experi- 
m e n t referred 
to was the out¬ 
come of a re¬ 
quest, addressed to the Director of the 
Experiment Station early in 1917, from 
growers in the vicinity of Elmer and 
Woodstown, for more definite informa¬ 
tion as to the best sources of nitrogen 
for potato fertilizers. 
Located on Typical Potato Soil 
After careful consideration the ex¬ 
periment was located on the farm of 
J. Harry Kandle, about 4 miles south 
of Elmer. The soil is a typical Sassa¬ 
fras loam of good quality, and is thus 
representative of much of the potato 
land of the State. The plots were laid 
out and the first crop—cobblers— grown 
in 1917. Potatoes have been grown 
each season since, on the same plots, 
and for a given plot the fei'tilizer treat¬ 
ment has remained the same. In this 
way it has been possible to observe the 
residual as well as the initial effects 
of the fertilizers. 
In addition to a study of the question 
with reference to the best sources of 
nitrogen, the experiment includes a trial 
of different amounts of a standard fer¬ 
tilizer—4-8-3—ranging from 800 to 
2,800 pounds per acre, in 400-pound 
steps; a comparison of 1,600 pounds per 
acre of a 4-8-0, 4-8-3, 4-8-6, 4-8-10, and 
a 4-8-0 with an initial application of 
greensand and marl at the rate of 2 V 2 
tons to the acre. Four check plots (no 
fertilizer) and 5 check rows were dis¬ 
tributed over the block. One plot re¬ 
ceives 1,600 pounds of a 4-8-0 with an 
initial application of ground limestone 
at the rate of two tons per acre and 
one plot an initial application of ground 
limestone only. 
The plots are 1/100 acre in size and 
the treatments are repeated, that is, 
plots 1 to 24 constitute one section and 
plots 26 to 48 another on which the 
fertilizer treatment is repeated. Fer¬ 
tilizers are applied annually at the 
time of planting potatoes. After the 
potatoes are dug, a green manure crop 
is seeded, usually wheat. 
Source of Nitrogen Important 
In the standard fertilizer one-fourth 
of the nitrogen is taken from nitrate 
of soda, one-foui'th from ammonium sul¬ 
fate and one-half from tankage. Acid 
phosphate is used as a source of phos¬ 
phoric acid and muriate for the potash. 
Certain plots receive the standard 
amount (1,600 pounds) of the 4-8-3 
mixtui'e with all the nitrogen obtained 
from (a) nitrate of soda (b) ammonium 
sulfate-(c) fish and (d) tankage. Other 
plots receive the standard amount with 
one-half the nitrogen taken from nitrate 
of soda and the other half from une of 
the three oth^r materials mentioned. 
Two plots receive a mixture like the 
standard with the exception that fish 
replaces the tankage. 
The potatoes were graded into 
“primes” and “seconds,” but total yields 
only are recorded in this report. 
By A. W. BLAIR 
When Everything Is Going In 
Referring first to the 
results with different 
sources of nitrogen the six-year aver¬ 
ages — 1917-1922 inclusive — show the 
following yields per acre: 
4-8-3 Bushels 
1,600 lbs., all N from nitrate . 249 
1,600 lbs., all N from ammonium sulfate.. 214 
1,600 lbs., all N from fish . 246 
1,600 lbs., all N from tankage . 244 
From these figures it will be noted 
that when all the nitrogen is taken 
from one source, the highest yield was 
with the nitrate of soda and the lowest 
with ammonium sulfate. However, in 
fairness to ammonium sulfate, it must 
be stated that 
the potat-^es 
from these plots 
have been freer 
from scab, and 
thus of a high- 
e r marketable 
value per acre, 
than those from 
the n i t r a te of 
soda plots. The 
difference be¬ 
tween the yield 
with fish and 
tankage is so 
slight as to 
leave the mat¬ 
ter of choice 
with the indi¬ 
vidual. 
When nitrogen was taken from two 
or more sources the average yields 
were as follows: 
4-8-3 . Bushels 
1,600 lbs., half N from nitrate and half from 
ammonium sulfate . 2.57/ 
1,600 lbs., half N from nitrate and half from 
fish. . 259 
1,600 lbs., half N from nitrate and half from 
tankage. . 259 
1,600 lbs., one-fourth N from nitrate, one- 
fourth from ammouium sul¬ 
fate and one-half from fish.. 244 
1,000 lbs., one-fourth N from nitrate, one- 
fourth from ammonium sul¬ 
fate and one-half from tank¬ 
age (standard) . 247 
These figures indicate very clearly 
that it is a distinct advantage to have 
nitrogen from at least two sources. 
When ammonium sulfate is used in 
combination with nitrate of soda, the 
yield is 43 bushels in excess of the yield 
with all nitrogen from ammonium sul¬ 
fate. The yields from a combination of 
nitrate and fish and nitrate and tank¬ 
age give further proof of the equal 
value of the two organic materials. 
When the nitrate nitrogen is reduced to 
one-fourth of the total, the yields are 
distinctly less than when the nitrate 
supplies one-half of the total nitrogen. 
The average yields per acre for the 
different amounts of the standard mix¬ 
ture, as compared with the check, were 
as follows: 
BusheU 
Cheek. .. Ib6 
800 lbs. 4-8-3 . 214 
1,200 lbs. 4-8-3. 238 
1,600 lbs. 4-8-3 (standard amount) .247 
2.000 lbs. 4-8-3 . 259 
2,400 lbs. 4-8-3 . 274 
2,800 lbs. 4-8-3 . 27b 
In the light of these results, it does 
not take very much figuring to prove 
that fertilizers pay, as witness 48 bush¬ 
els for 800 pounds of the 4-8-3 and 72 
bushels for 1,200 pounds. It would 
require an economist, however, to ai’- 
rive at the point of diminishing re¬ 
turns. This will be determined by the 
cost of labor, seed and fertilizer, and 
the selling price of the potatoes. Under 
some conditions it would undoubtedly 
pay to raise the application to 2,000 
pounds, while under other conditions 
it would be most economical to stop at 
1,200 to 1,600 pounds per acre. The 
increase in yield obtained by increas¬ 
ing the application from 2,400 to 2,_800 
pounds per acre is certainly not jus¬ 
tified. 
The Effect of Potash 
The tests with the standard fertilizer 
modified to include different percen¬ 
tages of potash gave the following acre 
Bushel. 
166 
211 
247 
255 
259 
238 
Check. 
1,600 lbs. 4-8-0.. . 
1,600 lbs. 4-8-3. . . 
1,600 lbs. 4-8-6. . . 
1,600 lbs. 4-8-10.. 
1,600 lbs. 4-8-0 and marl 
With 3 per cent of potash giving a 
six-year average increase of 36 bushels 
per acre over no potash, there is little 
/ 
