Arizona republican., 1911-10-01
HOPKINS HAS REAL MESSAGE
CONTINUED from Page Three)

the field cropped and managed the
same, except that no PHOSPHORUS
was applied. the S29.52 worth Of phos-
phorous produced $1,000 increase in
the value of turnips, s37.45 in bar
ley. 1898 in clover and other le-
gumes, and 1859 Increase In the
value Of the wheat. The total value
Of the crops grown on land not re-
ceiving PHOSPHORUS during the thlr-
tv-six years was S43243 per acre;
while on the phOsphated land the
crop values amounted to S662S2, an
increase of s23O39 from an investment
Of S2952 in PHOSPHORUS. Ihese
statements summarize the results OF
thirtv-six years Of careful inVestlga-
ton in practical farming on norman
soil. but not one American in nun
dred knows, utilities or imparts inns
information Meanwhile the ten-year
average WELD Of wheat in the United
States IS il bushels per acre. while
Germany's average IS 2S bushels ana
England's 80 bushels per acre; mean
while the United States continues to
export annually, for the paltry sum
Of five million dollars, million tons
of our best phosphate rock, carrying
away an amount Of phosphorus
which. il applied to our own depleted
and depicting soils would be worth
not five million. but n thousand mil
lion dollars for the production or 1000
for us and for the oncoming gener-
ations Of Americans.
AS an average of twenty-fOur years
Of carefully conducted field invesu-
cations with a four-year rotation OF
corn. oats. wheat and clover on nor
NAL soil at the Pennsylvania state
college the addition of $500 worth
~ DhosDhOrous increased the value OF
the four crops from $32.55 To S44.'Z'
and 4 COMPARISON of the two l2-Year
neriods reveals the fact that the aN-
erage crop value per acre per annufl
decreased on unfertiliZed land under
This rotation from S11O5 to sS.1S. !
decrease Of 26 per cent in the pro-
ductive power of the land. Mean |
while the average farmer, and even
the average business man who owns
a farm. allows the land to be de-
Melted and decreased in acre yleid I
hecause Of the erroneous and wide |
snread opinion that crop rotation VIII |
maintain the fertility Of the soil |
whereas the truth. as revealed by |
every long continued and trustworthy |
Investigation shows that the rotation |
of crops will no more maintain the
fertility of the soil. than the rotation
of the check book among the mem |
hers of the family would maintain /
the bank account
The rotation OF crop. should OF
II helms TO |
avoid Injurious insects and fungous |
diseases. and stimulates the soil to
produce larger crops for time, with |
the result, however, that the deple-
ton of the essential plant-food ele-
ments is even more rapid than IL
wheat were grown every year on the
land
In 1897 the Ohio Agricultural FIX |
pertinent Station began field in
vestigation on normal soil with a |
three-year rotation of corn, wheat. |
and clover-and as an average of |
the next thirteen years, the applica-
ton of tons per acre of farm ma
nure increased the value of the three |
crops from S2621 to s42.79; and the |
further addition of s1-20 worth Of
fine ground phosphate increased the |
crop values from s42.79 to $53.2S.
Meanwhile. the farmers and land |
owners Of Ohio continue, in the main, |
to use high-priced sO-called com |
plete" fertilizers in the same systems |
of land ruin that led to the agricul |
tural abandonment of much farm |
land in the older states.
As an average of nineteen years.
the Louisiana Agricultural Experiment /
Station applied s1445 worth Of plant
food chiefly in organic manures and |
acid phosphate, which produced an av-
erage increase Of SG2.25 in the value /
Of the crops in a three-year rotation
Of cotton, corn and cOWpeas. oats and |
cowpeas. grown on the typical much |
exhausted upland soil of the south.
The average yield Of cotton exceed |
ed a bale to the acre for the nine
teen years. Meanwhile, the average