NEWARK, Del Preliminary
results of the 1984 Delaware
commercial hybrid field corn
evaluations are now available for
plots at the University of Delaware
Georgetown substation. These
trials were conducted by the
Delaware Cooperative Extension
Service in conjunction with the
Delaware Agricultural Ex
periment Station under the
leadership of plant geneticist Jim
Hawk.
Extension associate Bob
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Umatowski, who is assisting
Hawk, has prepared a preliminary
report of the Georgetown results
which is available at county ex
tension offices in Newark, Dover
and Georgetown
According to Umatowski, 113
different hybrids representing 20
companies were involved in this
year’s corn variety trials. All
hybrids were planted at
Georgetown April 20 in con
ventionally tilled Evesboro loamy
sand. Two hundred pounds per
Hybrid trial results available
acre of Agway 10-20-20 corn starter
was applied with the planter.
Supplemental nitrogen was ap
plied as ammonium nitrate when
corn was in the five- to six-leaf
growth stage, for a total of 200
pounds of actual nitrogen per acre.
All plantings were irrigated
throughout the growing season.
For analysis, varieties were
divided into five maturity groups.
The Georgetown yields ranged as
follows; Group I - 167.3 to 96.3
bushels (125.6 bushel average);
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Group II -158.3 to 98.1 (134.7 bushel
average); Group 111 -171.8 to 116.2
(141.1 bushel average); Group IV -
168.8 to 130.5 (148.1 bushel
average): and Group V - 190.2 to
157.0 (157.0 bushel average).
Yields showed a different
company entry leading in each
maturity. Sixteen of the 20 com
panies represented had an entry
among the top five hybrids in at
least one maturity group.
Uniatowski says this suggests
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considerable competition among
thfe various breeders supplying
corn hybrids on Delmarva.
Individuals interested in ob
taining copies of the preliminary
results of the Georgetown trial
should contact county extension
offices in Newark (451-2506),
Dover (736-1448), or Georgetown
(856-5250). Results from other
locations will be available shortly.
The final report on the trials,
statewide, should be ready by the
end of the year.
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