No-tillage best
produce corn
DOVER, Del. - In spite of
ts labor and energy-saving
eatures, no-till production
,{com and soybeans hasn’t
Sways received the vote of
Confidence it should get in
Delaware. This is because
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William Q. Dmsmore Clifford Knepper Richard Bennett
Delaware farmers aren’t
totally convinced that this
tillage system will give them
the best yield and profit.
According to University of
Delaware Extension
agricultural engineer Tom
OR
, ; O»TRICT
.MANAGER*
method to
in Delaware
Williams, there’s also been a
lot of concern about whether
or not soil compaction
restricts root growth and
reduces yields, especially
with no-tillage.
However, there are now
ID
some promising statistics to
line up on the side of no-till
farming on the Delmarva
peninsula, reports Williams.
To help answer the
question of which is best, no
till or conventional tillage,
for the past three years
researchers at the
University’s agricultural
experiment station have
been conducting field tests at
Neward and Georgetown on
both systems for com and
soybean production. The
purpose of the tests was to
find out how various
production methods com-'
pared under local soil and
weather conditions.
Primary tillage treat
ments in the test plots in
cluded moldboard plow,
chisel plow, and no-tillage.
Within each treatment,
comparisons were also made
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' a "*T A> Box 160, Honey Brook, PA
Lancaster Farming, Saturday, March 11,1978
between in-row subsoiling
and no-sub-soiling. Sub
soiling was done under the
row 15 inches deep at
planting or just prior to
planting after secondary
tillage was finished.
A comparison of com
yields from each treatment
showed that the subsoiled
plots yielded significantly
less than no-subsoiling in two
out of seven tests. In-row
subsoiling actually
decreased yields by 5.5 per
cent over all tests with com.
Tests on full season
soybeans showed no
significant yield difference
between in-row subsoiling
and no-subsoiling.
But while subsoiling ap
peared to be a bust, tests on
com with no-tillage versus
chisel plowing on both loamy
sand and silt loam soils
came out strongly in favor of
no-till.
Over the three-year
period, no-tillage corn
outyielded chisel plowed
plots by six per cent (5.2
Cows
Horses .
Sheep - Goal
Hogs - Chi
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bushels) on loamy sand and
eight per cent (9.5 bushels on
the silt loam. The yield
advantage accurred whether
or not plots were irrigated.
“These results suggest
that no-tillage is the best
way to produce com on most
Delaware soils,” says
Williams. The findings also
suggest that in-row sui>
soiling is of no benefit on a
loamy sand soil for
producing either com or full
season soybeans m lower
Delaware.
SCARLET
SAGE
37