DB—Lancaster Farming, Saturday, September 3,1983
More reduced tillage corn
DES MOINES, la. - Do some
corn hybrids really perform better
under reduced tillage than those
for which no such claims are
made? All available studies say
“no”, according to Bob Seifert,
Director of Com Breeding for
Pioneer Hi-Bred International,
Inc. However, it should be possible
to develop hybrids with superior
performance potential in con
servation tillage environments, he
said.
In a paper presented at the 1983
annual meeting of the American
Society of Agronomy in
Washington, D.C., Seifert said the
absence of anv real differences
should not be considered sur
prising.
“While hybrids currently being
grown were selected and evaluated
under conventional tillage
systems”, he said, “breeders have
been working for years to improve
germination, seedling vigor,
disease resistance, insect
resistance all traits which are
important to plants grown under
conservation tillage.”
Still, Seifert pointed out, there is
an opportunity to develop
genotypes which could be superior
in reduced tillage system to those
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available today. And, given the
continuing growth in conservation
tilled-acreage, there is a definite
need for additional research in this
area.
The two most important traits on
which corn breeders should con
centrate are high germination and
strong seedling vigor, Seifert said.
Those characteristics equip the
plant to handle several of the
additional stresses associated with
reduced tillage. The most common
of these are the colder, wetter
conditions that result from ad
ditional plant residue on the soil
surface. But strong germination
and early growth can also be a
distinct advantage in competing
with potential weed problems in
conservation tillage environments.
One area of research which has
received little attention but which
could provide important in
formation is in the area of roots.
“Given the whole environmental
package of wetter soils, lower
temperatures, and different fer
tilizer placement”, Seifert said,
“we might theorize that a
horizontal, spreading, fibrous root
system would have some ad
vantages over a more vertical root
system in a no-till system.”
-METAL BLADES
INC.
MVERSTOWN. PA 17067 PH 717-866-7565
Corn hybrids with roots that
grow rapidly in cold soils would
also appear to be a fruitful area for
study, Seifert added, even though
there are currently no data
suggesting any advantage.
He acknowledged that there may
, be special problems with diseases
and insects under conservation
tillage, but cautioned breeders
against assuming that relation
ships are simple and straight
forward.
“It’s important to recognize that
surface residue has the potential to
increase some diseases, but the
incidence and severity of others
may decrease or not change. The
same principle applies to corn
insects. Additionally, there are
interactions in which one disease
may predispose corn to another
disease. The result is that these
relationships are a complex of
various interacting factors rather
than one of simple cause and ef
fect.’’
Seifert concluded his remarks by
listing his recommendations for
conservation tillage corn
breeding:
1. Set priorities on amount of
effort to be put into breeding and
testing for conservation tillage
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research needed
hybrids.
2. Set priorities on the hybrid
characteristics which are most
important for your area of
responsibility.
3. Use special evaluations for
germination and seedling vigor -
plant early, use untreated seed,
and laboratory cold tests.
4. Use special evaluations for
diseases and insects - artificial
inoculation/infestation and special
Gordon gets agri-loan post
HARRISBURG - Com
monwealth National Bank an
nounces the appointment of Alma
A. Gordon, Lancaster, as agri-loan
credit and operations manager in
the bank’s Agri-Loan Department;
she previously was Lancaster
Region commercial lending ad
ministrator. Her office will remain
at the bank’s Lancaster Region
headquarters, 28 Penn Square.
Gordon joined the bank in a
clerical post in 1959 and by acc
peting posts with increasing
responsiblity was promoted to loan
administrator in 1970. She was
named operations manager for the
T nncaster Region commercial
Manufactured for Agriculture
nurseries where diseases/insects
are present.
5. Consider doing a part of both
breeding and testing effort under a
conservation tillage system - no-till
preferred.
6. For breeding and testing ef
fort under conservation tillate use
proper research equipment, good
agronomic practices, and select
fields carefully.
loan area in 1972, and commercial
lending administrator in 1977,
A 1973 graduate of the Penn
sylvania Bankers Association’s
School of Banking at Bucknell
University, Gordon attended Penn
State and has pursued studies
through the American Institute of
Banking. She is a 1958 graduate of
Lampeter Strasburg High School.
Gordon is chairman of the
Lancaster-Lebanon Chapter of the
National Association of Bank
Women.
A native of Lancaster County,
Gordon resides in West Lampeter
Township.
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