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Group Title: Commercial corn variety testing results from south-central Florida.
Title: Commercial corn variety testing results from south-central Florida. 1986
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 Material Information
Title: Commercial corn variety testing results from south-central Florida. 1986
Series Title: Commercial corn variety testing results from south-central Florida.
Translated Title: Research Report - University of Florida Agricultural Research Center ; 1986-8 ( English )
Physical Description: Serial
Language: English
Creator: Mislevy, P.
Horner, E. S.
Martin, F. G.
Publisher: University of Florida, Agricultural Research Center
Publication Date: 1986
 Record Information
Bibliographic ID: UF00075790
Volume ID: VID00010
Source Institution: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
Resource Identifier: oclc - 143646330

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HISTORIC NOTE


The publications in this collection do
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




Central


science


Agricultural


Research


and Education


Center,


Research


Report


RC-1986-8


.ovemb4


1986


COMMERCIAL CORN VARIETY TEST
FROM SOUTH-CENTRAL FLORIDA


RESULTS
1986


P. Mislevy,


E. S.


Homer


and F


1/
G. Martin-


Corn


can be


extremely valuable


in a livestock feedin


program.


With


rapid


growth


can supplement


and high


perennial


yielding


grasses


ability,


corn harvested


at times when


production


and stored


is low.


as silage
Corn may


follow winter vegetables


or be


use


a pasture


renovation


program.


High


quality


corn


carbohydrate


calves


with


silage
input,
quality


can provide


possibly
feed.


dairy


and beef


reducing high


grain


cattle with a


costs


substantial


provide


growing


Corn ha
to 13 t/A of


used


for other


vested


for silage


dry matter


crops


in3


during


at the


proper


to 4 months.
the remaining


stage


This


to 9


maturity can


would allow the


lan


produce
d to be


months.


Corn


forage


harvested


at the hard


dent


stage


for silage


usually


contains


to 50% dry matter,


carotene,


vitamin D,


approximately


8% crude


but low in minerals.


protein


and is high


produce high


fields


n energy,
of quality


corn


forage,


control,
measures


adapted


correct


plant


hybrids


proper


populations


seeding
nd weed


date,


insect


high


fertility,


and di


sease


water


control


are necessary.


purpose


this


study was


to evaluate


commercial


corn


hybrids


silage


and/or


grain


production at


Ona.


Experimental


Procedure


experiment


was


conducted


at the Agricultural


Research


and Education


Center


(AREC)


Ona.


experimental


design was


a randomized


complete


block


with
fine


replications


sand


on March


Thirty
1986.


commercial


corn


varieties


were


seeded


on an Ona


Fertility


seedi


Fertilization pra
ng. Nitrogen was


ctices were
applied at


970 lb/A of


a rate


0-10


60 lb/A


0 (N-P205-K20)
pre-emergence,


prior
and 1


Ib/A


when


to soil


corn


test


plants


results


were
with


and 24 inches


adequate


amounts


tall.


Soil


pH was


6.0,


according


calcium and magnesium in


soil.


""* - _










Plant


population


pest


control


Corn


27,000
(active
acre.


was


plants


seeded


in 30 inch


rows


per acre. Hefrbcide
and 2.0 lb/A Lasso (ac


thinned


practices


(active)


No cultivati9) practices were
Furadan 15 G (2.7 Ib


insecticide


seeding


to control


insecticide was


applied


used


to the seed


mole


crickets


for bud


worm


at the rate


a final


used were


pre-emerge


employed
active/A)


after
was


population


2.0 lb/A atrazine


in 35 gallons


corn


was


applied in


on small


and bud worms


control.


Ib commercial


corn.


insecticide


product/ 100


of water
seeded.


inch


bands


No a( tional
Mesurol was


seed


repel


birds.


Irrigation


A total


of 7.5 inches


water was


applied


using over-head


irrigation


sprinklers.


Corn maturity


at harvest


Corn


varieties
This was


most


grain


plants


were


were


harvested


at the hard


coincidental


varieties.


yield,


percentage and


with


dent


for dry matter yield
stace as recommended


black layer


Other variables


forage


dry matter


recorded


(percent


grain-to-stover ratio.


formation
for the


and yields),


Grain


yield


when


the kernel


for sila


at the


base


of most


ge production.
of kernels in


experiment were


oven


kernel moisture,


values


were


converted


shelling
and


expre


ssed in bushels


shelled


corn


at 15.5%


moisture.


Results


and Discussion


were o
yield,


Signific
obtained


cant


(P<0.0


for forage


kernel moisture,


Forage


the 1986
of 10.3


differences


among


dry matter yield


shelling


dry matter yields


season
t/A for


matter yields


than


the 1985


averaged
'McCurdy


in 1986
yields.


percentage,


of commercial


8.9 t/A


8172


averaged
However,


(Table


to a
over


a low of


the 30 commercial


percentage


forage


and grain-to-stover


corn hybrids


These


yields


7.3 t/A for


all 30 varieties


the 1986


ields were


corn


varieties


dry matter,


ratio


grown a
ranged


'Jacques


grain


(Table


at Ona during


from a
7900'.


tested were


similar


to 1984


high
Dry


t/A lower
which


averaged 8.
herbicides,


8.8 t/A dry matter.


etc.


in 1986


were


Cultural


practices


essentially


(seeding,


same


as 1985.


fertilizing,


Since


experiment


was


dry matter yield.


Average
however,


This


high
1985


irrigated


However,


temperature


high


as needed,


rainfall


temperature


for March


temperature


higher temperature


for 198


generally


appeared


through June


for the
5 may b


same


time


to be the


1984


period


be responsible


little


effect


determining
1986 was 82.7


averaged


for the


82.75
86.250


average


factor.
o F,
F.


dry matter


yield


being


t/A above


1984


and 1986.


Percent


forage dry matter


at harvest


averaged


in 1986


which was


6 n. A n rt n aaa 1A


al^/^fl^


1 nrT-rau


**t~ at


aoln^. -a


vr~tl\ rf~l


ml~ -i *


n Id n~


' ItQ^^"


ra










Growers


should


consider using


some


early maturing hybrids


like


Agratech


GK 900'


'Seed


and respectable


time


heavy


gained
summer


from


Tech H 2775A'


forage
early


rains.


yields
harvest


On the


which


mature


and allow for


allows


average,


time


early,
earlier


for seeding


high


produce
harvest.


a second


early maturing hybrids


grain


yields


additional


crop


produce


before
lower d


matter yields


(Table


than


late


seas


on hybrids,


but plants


fast,


have


kernel moisture,


and have


good


grain


yields


and grain-to-stover ratios.


Grain


hybrids.


yield
Grain


15.5% moisture


is another


yields


in 1986


(Table


characteristic


averaged
highest


to consider when


166 bu/A shelled


grain


corn


selecting


corn


adjusted


yielding variety was


Sunbelt


1827


producing
high fora
of 35.5%
varieties


an average


ge


dry matter y


and kernel


204 bu/A shelled
field averaging 1


moisture


tested in 1986.


of 36.8%,


corn.


0.1


which


a commercial


This


t/A;


variety


forage


is about


basis,


this


also


dry matter


average
variety


produced
at harvest


for the 3
is ready


forage harves


before


it was


ting b
ready


would


require an


additional


weeks


of field


dryin


for grain harvest.


When


selection


corn hybrids


to be


harvested


for silage


it is important


factor


expressed


varieties with


('Funks


to consider


is the grain-to-st


as a percentage


a relatively


resulted
('Northrup


G 4686')


Other varieties


over


by weight


high


a low


ratio.


rain


forage


The grain-to


available


dry matter


grain-to-stover


PX 9581')


which


ield


ratio


produce


-stover


in the sil


and low
(41-59%)


high


grain


age.
grain


ratio
Corn
yield


(Table
yields


medium stover yields


(short


stalks)


result


in 63-37%


grain-to-stalk


ratio.


This


type


of silage would


more


desirable


for backgrounding


beef


cattle


lactating


hybrid,


high


dairy


choose


cattle which
a variety with


grain-to-stover


ratio.


require
a high


Varieties


high


energy


feed.


dry matter yield,


like


Sunbelt


When


high


1827


selecting


grain


and Seed


a corn


yield and
Tech H-2775A


fit this


criteria.


Southern


corn


rust


(Puccinia


polysora)


was


not a serious


problem


during


the 1986
commonly


growing
call bu


season.
worm,


Some


was evi


army worm damage (S
dent on corn plants


podoptera
4-5 feet


frugiperda Smith)
tall. No


insecticide was


utilized


20% of the plants were


ked.


No bud


to syst









Conclusion


When selecting


a commercial


corn


hybrid


to be grown and


stored


as silage


in south-central


forage and


grain


Florida,
yields,


it is best


resulting


to select


in a high


a variety


(about


50-50)


that


produces


high


grain-to-stover


ratio.
and low


Varieties


kernel


selected


moisture.


should


corn


have


a high


hybrids


forage dry matter percentage


are grown


for grain,


high


grain


yields


at low


kernel moisture


is important.


Varieties with


kernel


moisture


indicate


rapid


field


drying,


earlier harvesting,


with


low storage


drying


costs.


Some


1986
Seed
9581.


varieties


at Ona were


Tech H


2775A,


that


Sunbelt


have
1827


Agratech


produced


high


'Paymaster


GK 900,


dry matter


8951


Asgrow O's


, McCurdy
Gold 2545


grain


8172,


yields


'P-A-G


and Northrup


SX 383


King






Table


Forage


grain


yields


other


agronomic variables


of commercial


corn


varieties


grown


Ona,


1986.


Forage dry matter


Company
brand


Variety


Yield


Grain
Yield


at harvest


Kernel
moisturet


Shelling
percentage


bu/A


McCurdy
Sunbelt


Funks


Jacques
Paymastei
Agratech
Asgrow
P-A-G


Dekalb
Pioneer


8172
1827


G 4686
JX 247


8951
GK 925
O's Gold 5509
SX 383


DK 789


10.3 a


10.1
10.1
10.0
10.0


39.1
35.5
32.2
35.8
42.3


*
a-g
c-1


a-c


a-c


10.0 ab


.6 ab


3055


Coker


Paymaster
Pioneer


Seed


Tech


Sunbelt


Agratech
Northrup King
Sunbelt


Seed


Tech


Dekalb


Asgrow
Asgrow
Northrup King
Jacques
Northrup King
Dekalb


McCurdy
Funks


P-A-G


8990
3192


H-2775A


1860


GK 900
PX 95


.6 ab
.6 ab


1882


H-2686A
DK 689
RX 892
O's Gold
PX 9581


.4 ab


2545


8700


PX 9540
DK 711


8150


G 4733
SX 352


7900


Jacques
AVERAGE


.8 ab


34.1
36.4
32.5
30.7
38.7
37.5
41.3
36.9
33.3
35.2
30.4
33.0
39.3
34.3
40.7
39.6
38.5
33.4
39.3
35.2
38.2
32.9


38.1
37.2
34.8
37.6


85.1
85.3
82.9
81.1
84.8
85.8


a-e


37.8 c


a-c
a-c
a-c
a-c


153 bc
193 ab


a-c


194 ab


a-e


148 be
189 ab


a-c


195 ab
151 be


a-c
a-c


.6 ab


.3 b


39.3 a-f
36.5


a-c
a-c


33.6
40.5


36.7
33.8
33.1
33.3
37.4
32.0
41.6


c-e


35.9
37.6
34.0
31.8
34.1


30.7
33.0
32.8
35.0
30.7


35.3


8 b-h


84.2
81.9
85.2
86.4


c-e


a-c


82.0 d-i
83.8 b-h


85.2
80.4


79.0 i


81.4
82.0
86.9


87.5 ab
87.4 ab
85.5 a-f
84.5 a-h
87.4 ab


86.2
83.4
84.4
88.6
86.7
84.4


a-c


Gra









Table


cont.


Means within a


column


followed by


same


letters


are not


significantly


different


(P<0.05)


using


Multiple


Range


Test.


tBased


on 15.5% moisture


(shelled


corn)


Determined at

Expressed as


harvest.


a percentage


by weight


on an oven


basis.


Agratech


and Seed


Tech


formally


known as


Gold Kist


Golden Harvest,


respectively.


Seeding

Plant r


date


population


March


1986


(final)


27,000 plants/A


Insecticide


Furadan


18 lb/A commercial


product


in 7


inch


band


over


corn


row at seeding.


Row spacing


30 inches


Fertilization


0-100-200


lb/A


pre-emergence,


6.0,


(N-P 0 -K 0)
120 and 120


prior to
lb/A when


calcium and magnesium was


adequate


seeding.
corn was


Nitrogen was
and 24 inche


, according to


soil


applied
s tall.


U


a rate


of 6


respectively


test.


Herbicide:


Pre-emerge application


of Aatrex(R)


and Las


at 2


lb/A active


, respectively.


Irrigation


Applied


inches


of water via


overhead


sprinklers.


15G(R)


so (R)










Table


Average


grain


and forage


dry matter


ields


ecte


dent


corn


varieties


rown


at Ona


for three


years


1981


-1986.


Company


brand


Variety


Years
tested


Forage
dry matter


Grain


15.5% moisture


bu/A


R4no


Arnm r


Golden Harvest


1604


H2680


10.0
8.7


Coker


Jacques
McCurdy
Northrup
Paymaster
Funks


Asgrow
Asgrow
Dekalb


JX 247


8150


PX 95


8951


G4733
RX 909
RX 114
XL-395


AVERAGE


Name has


been


changed


to Seed


Tech.




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