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not reflect current scientific knowledge
or recommendations. These texts
represent the historic publishing
record of the Institute for Food and
Agricultural Sciences and should be
used only to trace the historic work of
the Institute and its staff. Current IFAS
research may be found on the
Electronic Data Information Source
(EDIS)
site maintained by the Florida
Cooperative Extension Service.
Copyright 2005, Board of Trustees, University
of Florida
I
947
Agricultural
Research
Research
Report
and Education
Center,
RC-1985-2
Central
Science
Library
OCT
University
1987
FIo MStembe
1985
COMMERCIAL
CORN VARIETY
TEST RESULTS
FROM
P. Mislevy
SOUTH-CENTRAL
. E. S. Horner
FLORIDA
and F
1985
Martin -
Corn
can be extremely
valuable
a livestock
feeding
program.
With
rapid
growth
anrd- high.yieldin
-ability,
corn
harvested
stored
as sila
can supplement pe
may follow winter
High
quality
carbohydrate
calves
with
corn
input,
quality
rennial
grasses
vegetables
silage
at times when
or be used
can provide
possibly
feed.
reducing
dairy
high
their
a pasture
and beef
grain
production
renovation
cattle
costs
with
provide
is low.
program.
Corn
a substantial
growing
Corn
harvested
for silage
at the
proper
stage
maturity
can produce
to 13 t/A of
free
for the
matter
growth
to 4
other
crops
months.
during
This
would
allow
the remaining
land
to be
months.
Corn
forage harvest
at the hard
dent
stage
for silage usually
contains
to 50% dry matter,
carotene,
corn
forage,
control,
necessary
vitamin
adapted
correct
plant
approximat
but low
hybrids
popul
crude
in minerals.
, proper
nations.
seeding
wee
prot
ein and is
produce
high
date, high
sect
high
yields
ertility,
and di
sease
n energy,
of quality
water
control
are
The purpose
silage and/or gr
of this
a in
study was
production
to evaluate
commercial
corn
hybrids
at Ona.
Experimental
Procedure
experiment
was conducted
at the
Agri
cultural
esearc
and Education
Center
(AREC)
Ona.
expe
rimental
esign
was a random
complete
block
with
replications
Twent
-nine
commerce
corn
varieties
were
seeded
on an
Ona fine sand on March
Fertility
1985.
practices
3ertilization
503- micronutri
60 Ib/A
inches
ents
pre-emergence,
tall,
resp
were
1270
lb/A of
prior to seeding.
and 122 and 50 ib/A
actively.
Soil
Nitr
whe:
was 5
0-10-20 (N-P 0
ogen was applied
n
corn
plant
erefore,
-K 0)
at a
were
+ 40 Ib/A
rate
and 24
dolomiti
lime
stone
was
applied
to supply
calcium and
magnes
ium.
A total
inches
irrigation
water
was
applied
using
over
head
I rrl cnrlnn cnrlnt-1 arc
- -
A-*a
cn+r't nl 1
Plant
populations
pest
control
Corn
26,000 p
(active)
was
seeded
plantss
in 30 inch
acre.
Heflbcide
and 2.0 lb/A Lasso
rows
and thinned
practices
tive)
used
pre-emerge
a final
were
population o
Ib/A atrazine
in 35 gallons
water
acre.
insect
seeding
No cultivatisQ)pra
cide Furadan 15
to control
mole
ctices
G (2.7
crickets
were
employed
Ib active/A)
worms
after the c
was applied
when
corn
orn
was
in 7
seeded.
inch
bands
small.
addition
Mesurol\
insecticide
was
applied
was used
for bud
to the seed at the
worm c
rate
control.
The insecticide
commercial
product/100
seed
to repel
birds
Irrigation
A total
of 8.6 inches
water
was applied
using
over-head
irrigation
sprinklers.
Corn
maturity
at harvest
Corn
plants
were
harvested
for dry
matter
field
when
the kernel
most
varieties
were.
at the hard
dent
as recommended
for silage
produ
action.
This
most
eld,
grain-to
bushels
was coincidental
varieties.
forage
-stover
with black
Other variables
dry matter
ratio.
shelled
corn
(per
Grain
cent
layer
recorded
and yie
ield
at 15.5%
values
formation
for the
Ids)
were
at the base
experiment
kernel
conve
of kernels
were
grain
moisture,
rted
express
sed in
moisture.
Results
and Discussion
were
grain
matter
Significa
obtained
yield,
yields
averaged
'Dekalb
11.0
DK 748
(P<0.05)
for forage
kernel moi
differences
dry matter y
sture
commerce
t/A
' to
(Table 1)
a low of
among
yield,
and grain-t
corn
hybrids
These
the 29 co
percentage
o-stover
grown
fields
ratio
mmercial
forage
(Table
at Ona during
ranged
'Golden
from a
Harvest
high o
H-2680'
corn
varieties
dry matter,
Fora
the 1985
,f 13.0
ge dry
season
t/A for
Dry matter
yields
in 1985
averaged
over
all 29 varieties
test
were
2.2 t/A higher
than
the 1984
yields
irrigation,
However. th
Cultural
etc.) :and
e avera
practices
rainfall
ge high
in 1985
temperatures
(seeding
were es
in 1985
fertilizing,
essentially
were
herbicides
he same as 1984.
and 3 F higher f
March,
in 1985
April
and May,
account
respe
for the
actively.
higher
This,
along with
matter
16 days
earlier
seeding
fields.
Percent
forage
matter
at harvest
averaged
42.5
in 1985
which
a year
also
maturing
hnv in rn T-
9.4 t/A for
was
"jT ^ iy t
(cide
v^^
'11
Grain
yield
is another
characteristic
to consider when
selecting
corn
hybrids.
15.5% m
Grain
moisture
producing
down,
yields
(Table
an average
containing
moisture a
harvesting
silage about
49.8%
t harvest.
grain
10-14
in 1985
229 bu/A
dry matter
On a
(kernel
averaged
highest g
shelled
in the
commercial
moisture
ays earlier,
198 bu/A
grain
corn.
entire
this
27.7%),
because
shelled
wielding variety was
adjusted
This
plant
variety ha
and 27.7%
variety would
or could
plant
have
would
siologically mature.
been
have
to
SX 383
a rapid
kernel
be ready
harvested
for
for
been
When
factor
selecting
to consider
corn
hybrids
to be
the grain-to-stover
harvested
ratio.
for silage
This
factor
an important
takes
into
ideration
grain-to-sto
available in
matter yield
grain-to-stover
produce
in a 56-4
desirable
require h
with a
ratio.
high
4%
the -relationphip
ver
ratio
the silage.
and low grain
ratio
grain
grain-t
express
Corn v
yield
(39-61
yields
o-stalk
for backgrounding
high
energy
high
Varieties
feed.
matter
like
between
rain
stove
as a percentage
varieties
d ('Sunbelt
(Table
and medium
ratio.
beef
.When s
yield,
'Dekalb
with
t 1876
stover
This t
cattle o
electing
high grain
DK 789' a
type
or 1
above
by
r yield.
weight o
a relatively
Other
yields
resulted
varieties
(short
silage
actating
a corn
yield and
high
in
(PAG
stalk
would
dairy
hybrid,
d high
'Agri-Tech
criteria.
grain
forage
a low
SX 383)
which
resulting
more
cattle
choose
grain
GK 925'
a variety
-to-stover
fit this
Southern
the 1985
commonly
insecticide
growing
called
was
bud worm damage
temic
corn rust
season.
worm
utilized
was
protection
evident
from
ccinia
Some
was
because
polysora)
army worm damage
evident
only
on corn
not a serious
(Spodoptera f
plants
20% of the-plants
nt at the sharter p
the Furadan used
plant
d at
4-5 feet
were
heights
seeding.
problem
frugip
attacked.
Srda
No
during
Smith)
mainly
Variety
selection
When
production
have
considering
in south c
performed
these data
have produce
and 4
year
objective,
21' a
commerce
central
corn
Florida
consi
'Ring..Around
ed an average
period,
Ring Around
averaged
over
stently Well
1604'.
hybrids
it is d
a three
King
of
2).
dry matter yield
respect
1604,
tivel
Golden
(Table
Harvest
178 and 178 bu/A shelle
for forage
desirable
and/or
select
six year
PX 95'
10.0,
rain
vari
eties
that
and 'Jacques
10.0
If grain
2680, Ja
d corn a
and 9.8 t/A
JX 247'
over
a 5,
production
cques
JX 247
Coker
sture
siiage
cons
as sil
yield an
corn
tall.
riod.
Northrup
Varieties
Dekalb
DK 789,
that
Agri
performed
-Tech
well
GK 925,
at Ona
Jacques
in 1985 were
8700'
'Dekalb
'Dekalb
T 1230'
DK 689'
, 'McCurdy
8172
Coker
21 and PAG SX 383.
Table
Forage
ASREC
, Ona,
grain
1985.
yields
other
agronomic
variables
of commercial
corn
variety
gro\
Forage
Brand
Variety
Yield
dry matter
At harvest
%
Grain.
Yield
Kernel
moisture
stove
bu/A
Dekalb
Sunbelt
Coker
Dekalb
Northrup
Pioneer
DK 748
1876
C 8905
DK 689
King
PX 9
3055
DK 789
Dekalb
Funks
Agri-Tech
Agri-Tech
Jacques
9002
GK 900
GK 925
8700
JX 247
T 1230
Jacques
Dekalb
Sunbelt
Pioneer
Pioneer
McCurdy
Coker
Funks
1860
3192
3165
8172
13.0
12.8 a
12.4
12.4
12.3
12.3
12.3
12.2
11.7
11.6
11.3
11.1
11.0
11.0
10.9
10.7
10.6
10.6
10.6
10.5
10.5
10.0
10.0
G4733
SX 383
McCurdy
Ring Around
Paymaster
Northrup
Jacques
Ring
King
Around
Paymaster
Jacques
Golden
AVERAGE
8150
1604
8990
41.5
37.9
40.4
44.8
a-c
a-c
a-c
a-c
38.9
42.9
39.7
43.9
40.7
41.2
39.8
41.6
42.4
46.3
43.5
40.2
41.1
c-e
a-c
a-c
a-c
a-c
a-c
a-c
222 ab
c-e
a-e
c-e
c-e
c-e
a-c
a-c
215 ab
212 ab
a-c
216 ab
a-c
a-e
a-c
a-c
a-c
212 ab
216 ab
c-e
c-e
49.8 a
45.1
40.6
39.9
38.7
49.7
47.9
PX 9692
7900
1502
8951
8400
Harvest
H-2680
11.0
a-c
a-c
c-e
c-e
a-c
a-c
c-e
42.6 b-e
45.0 a-d
42.5
a-c
a-c
a-c
31.8
38.3
33.0
31.5
33.0 b-d
33.9
33.5
33.9
28.3
32.1
31.7
31.3
29.8
31.0
29.6
32.2
30.1
31.4
30.6
27.7
29.0
31.5
28.9
29.6
26.7 k
27.3
30.9
28.6
29.7
30.9
41-
39-
40-
43-
45-
43-
49-
40-
44-
49-
50-
47.
51-
47.
47,
46
53
53
43
56
50
55
41
52
53
47
52
56
58
48
__I I ~--. --- -- -----------~ f~ I--
I IIII I_ I| _ II__ III__ I IL III I
Gra
Table
Forage
and grain
yields
and other
agronomic
variables
of commercial
corn
varieties
grow
AREC,
Ona,
1985
cont.
*
Means
within
a column
followed
same
letters
are not
significantly
different
(P<0.05)
usin
Duncan
s Multiple
Range
est.
4Based
*'Based
on 15.5% moisture
(shelled
corn).
TDetermined
at harvest.
Calculated
on oven
basis.
Seeding
Plant p
date:
population
March
(final)
1985
: 26,000 plants/A
Insecticide:
Furadan
15 G(R)
18 lb/A
commercial
product
in 7
inch
band
over
corn
row
at seeding.
spacing:
30 inch
Fertilization:
0-127-254
Ib/A
pre-energence
05-K 0,
rn. l22
respect
tivel
lb/A
+ 40
N when
lb/A F
corn
503 micronutrients
plants
were
appli
24 inches
6
ta
respect iv
ely.
Herbicide:
Pre-emergence
application
of Aatrex(R)
and Lasso(R)
at 2.0
lb/A active,
respectively.
Irrigation:
Applied
8.6 inches
water
overhead
sprinklers.
_ __ __ I _I I
Tabl
Average
varieties
grain
grown
and forage dry matter
at Ona for
three
fields
years
selected
dent
corn
1980-1985
Brand
Variety
Years
tested
Grain
matter
15.5% moisture
bu/A
Ring
Around
1604
10.0
Golden Harvest
Jacques
Coker
Northrup
McCurdy
Jacques
Big-D
McCurdy
Funks
Paymaster
Northrup
Funks
King
H 2680
JX 247
PX 95
67-14
10.0
JX 8400
6986
8150
G-4740
8951
King
Asgrow
Ring Around
Asgrow
Funks
Dekalb
Coker
AVERAGE
10.1
PX 9692
G 4733
RX 909
1502
RX 114
G-4507
XL-395
8.9
I I__I II I_ II I~_____ I I II
|