C24—Lancaster Fannins, Saturday, January 26,1980
York County com clinic gives booster for yields
BYJOYCEBUPP
Staff Correspondent
BAIR York County’s
annual corn clinic continues
to be one of the most popular
winter educational meetings
sponsored by the extension
service. Over 300 farmers
filled the 4-H center for this
year’s meeting on January
17.
They heard extension
specialists, compared tillage
and planting practices and
visited the two dozen
commercial booths set up for
the day-long event.
Featured speakers from
Penn State were ag engineer
James Garthe; Willis Mc-
Clellan, the university’s
weed specialist; and en
tomology expert Stan Gesell.
In a presentation on
reducing field losses of corn
crops, Garthe exhibited data
slides on the value of har
vesting high moisture gram
/**x.
~ fir
,K^^-
*'* r ‘!» _.
Donald Lott, right, ag pesticide inspector for the state department of
agriculture, explains the pesticide applicator recertification form to Clarence
Godfrey.
and treating it with acid
preservatives.
Acid treatment allows
'storage of grains at 25 to 30
percent moisture, without
the capital investment of a
silo. Propionic acid, alone or
mixed with acetic acid, is the
product often used, m
amounts of approximately
one to three percent of the
weight of the gram to be
treated.
Actual quantities must be
determined by the conditions
of storage tune, temperature
and moisture content.
Because the acid does
react with certain chemicals
and with concrete, tests have
been run to determine the
type of materials that best
resist the corrosive action of
the acids.
Aluminum structures
rated the highest points, but
galvanized steel treated with
several coats of primer and
«JP.J^
paints were also found to be
suitable. Detailed
specifications on those
various materials are
available from the extension
service.
But acid-treated gram has
perhaps an even greater
advantage than just gettmg
it harvested early. Acid
treatments, says Garthe,
can increase crude protein
levels of feed grams up to
four percent, at about one
tenth the cost of soybean
meal protem additives.
Rolling the gram through a
mill mcreased the nitrogen
and protem retention even
more. And, livestock made
greater weight gams on the
treated feeds.
According to Biil Mc-
Clellan, Penn State weed
specialist, certain farms
across the state are en
countering a brand new
problem m fertilization - too
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much of a good thing. The
good thing is poultry
manure; and some fields
near poultry houses are
gettmg too much of it,
resulting m excessive levels
of both phosphorus and
potassium.
“It’s to the pomt where we
■ must soil test to see where
we can do the least damage
with manure applications,”
warned McClellan.
Estimates are that, for each
pound of nitrogen going into
the soil m poultry manure, a
pound of phosphorus and a
half-pound of potassium are
also added
When phosphorus levels m
the soil become too high,
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FARMERS
FIRST EfiMK
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corn plants do not receive
needed amounts of the trace
mineral zinc, while high
potassium counts affect the
levels of magnesium.
However, because of its
great value m adding other
trace elements, manure
remains an important soil
improver.
With the cost of chemical
fertilizers escalating to
unheard of levels, scientists
are turning their research
toward developing plants
that biologically mcrease the
amounts of nitrogen m the
soils.
Alfalfa, for instance, is the
best nitrogen producer,
automatically addmg 1 200
on
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pounds per acre back into
the soil.
Ladmo grasses put back
about 175 pounds, lupines
add about 150 pounds, and
crimson clovers and pasture
grasses restore about 100
pounds.
McClellan also em
phasized the need for
regular lime applications,
since a key to proper weed
control with herbicides is the
proper level of sod acidity.
Any pH reading below 6.2
is crucial, says McClellan,
and just adding a ton of lime
per year as a rule of thumb
may not be enough if the sod
was too acid to begin with.
(Turn to Page C 25)