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2005 Kentucky Hybrid Corn Performance Tests

William L. Pearce, Ron W. Curd and Dr. Chad Lee.

click here for the printer-friendly pdf

 

About the 2005 test

Table  1.--Precipitation at Test Locations 2005.

Table  2.--Hybrids Tested in 2005.

Table  3.--Agronomic Information for 2005 Test Locations.

Table 4E-1YR - Early Maturity Hybrids, 1-year summary

Table 4E-2YR - Early Maturity Hybrids, 2-year summary

Table 4E-3YR - Early Maturity Hybrids, 3 year summary

Table 5M-1YR - Medium Maturity Hybrids, 1-year summary

Table 5M-2YR and 3YR - Medium Maturity Hybrids, 2- and 3-year summaries

Table 6L-1YR, 2YR and 3YR - Late Maturity Hybrids, 1-, 2-, and 3-year summaries

Table 7W-1YR, 2YR and 3YR - White Maturity Hybrids, 1-, 2- and 3-year summaries

 

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About the 2005 Test

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2005 KENTUCKY HYBRID CORN PERFORMANCE TEST

 

William L. Pearce, Ron W. Curd and Dr. Chad Lee.

 

The objective of the Kentucky Hybrid Corn Performance Test is to provide performance estimates of hybrid seed corn sold in Kentucky. Every effort has been made to conduct the test in an unbiased manner according to accepted agronomic practices.

 

PRESENTATION OF DATA

Complete 2005 data is presented for the tests at each location. Two-and three-year averages for yield are included in each of the single location tables. Readers are encouraged to consider multiple year averages and averages over locations reported in Tables 4E-1YR, 4E-2YR 4E-3YR, 5M-1YR, 5M-2YR, 5M-3YR, 6L-1YR, 6L-2YR, 6L-3YR, 7W-1YR, 7W-2YR and 7W-3YR. These tables present better estimates of hybrid yield ability than data gathered at one location in one year.

 

Comparisons between yields and other characters of any two or more hybrids should be made only with data from one table at a time. Hybrids are grouped into Early, Medium, Late, White, and High Oil tests based on relative maturity or trait characteristic.  Hybrids that yield equally as high as the highest yielding hybrid, based on statistical evaluation, are indicated by an asterisk. See the HYBRID COMPARISONS and the EXPERIMENTAL DESIGN AND MEANS COMPARISONS text sections for more detail.

 

 

TESTING PROCEDURE

 

SELECTION OF HYBRIDS

The hybrids chosen for testing are those most likely to be available for sale in 2006. Seed of each commercial hybrid (Table 2) was obtained from the sponsoring company. Each company defined the maturity of their hybrids and was given the opportunity to identify the proper tests for their hybrids.

 

LOCATION OF TESTS

The map on page 1 shows the test locations. The test sites were selected to represent different agroclimatic areas of Kentucky where corn is a major commodity.

 

CULTURAL PRACTICES

 

Corn was planted no-till into soybean stubble at all locations, except for Quicksand where corn was planted no-till into wheat cover crop stubble.  Fertilizer was applied as indicated by soil tests.

 

All test areas were treated with herbicide(s), insecticide(s) and supplemented by postemergence herbicide when necessary. Force was applied in the row at planting to control corn rootworms. Table 3 shows the specific cultural treatment for each location and includes notes about the growing season.

 

EXPERIMENTAL DESIGN AND MEAN COMPARISONS

Each hybrid was grown in three replications at each location to sample uncontrollable variability within the field. Annual mean yields presented in the tables are averages of three replications at the test site, while 2-year and 3-year means are averages of six and nine replications, respectively. A randomized complete block (RCB) design was used for each maturity group test at each location.

 

These tests are designed to predict yield ability. Slight differences in yield ability can occur as a result of variability in the field. The least significant difference (LSD) is used to account for that variability and to help determine significant differences between hybrid performances.

 

Consider the following example:

Hybrid

Yield (bu/acre)

A

165

 

B

155

 

C

140

 

LSD (0.10)

12

 

    

The yield difference between Hybrid A and Hybrid B is 10 bu/acre (165 – 155 = 10). The difference is less than the LSD (12 bu/acre). Based on the LSD, the yield difference between hybrids A and B is not significant. Hybrids A and B have the same yield in this test. However the yield difference between hybrids A and C is 25 bu/acre (165 - 140 = 25) which is greater than the LSD (12 bu/acre).  Based on the LSD, Hybrid A yielded more than Hybrid C in this test.

 

The LSD occurs at the bottom of each table. Yields that are less than the LSD are not significantly different from each other. The notation "N.S." in the tables indicates that no statistically significant differences were determined. An asterisk has been placed alongside yields that are not significantly different from the highest yield mean in that column. In addition, the tables are sorted from greatest yield to least yield.

 

The C.V. is a calculated value that helps indicate unexplained variation.  A smaller C.V. indicates less unexplained variation and more precise results.

 

PLANTING

All plots were planted with a John Deere Maxi-Emerge vacuum, two-row, no-till planter modified for small plot work. Modified planting cones replaced the planter boxes and  allowed placement of a specified number of kernels per plot. Each hybrid seed was planted into plots consisting of two rows 30 inches apart and 22 feet long. Hybrid seed was planted at 40 seeds/row for each plot. When seedlings were 12 to 18 inches tall, the stands were thinned to 33 plants/row equaling 26,000 plants/acre.

 

HARVESTING

All plots were harvested with a Massey Ferguson MF 8-XP two-row corn combine. Both rows of each two-row plot were picked and shelled. The grain weight, moisture content, and test weight of corn from each plot was measured with an electronic scale and moisture meter mounted on the combine. Yields were calculated for grain at 56 pounds per bushel and adjusted to 15.5% moisture. The test weight reported in each annual table for any hybrid is not corrected for harvest moisture and is reported at the moisture content for that hybrid listed in that table. Dropped ears were not gleaned from the plots.

 

The total number of lodged plants was recorded at harvest. Also at harvest, selected plots were observed to indicate apparent European corn borer damage by counting the number of broken tops per plot, according to a protocol by Dr. Rick Bessin, Department of Entomology, University of Kentucky. Corn borer damage was minor at all locations. In general, Bt hybrids had less apparent corn borer damage than non-Bt hybrids.

 

HYBRID COMPARISONS

The Kentucky Hybrid Corn Performance Test is divided into five tests: Early, Medium and Late maturities, White, and High Oil hybrids. These divisions provide evaluations of the five hybrid groups without competition biases. The divisions do not allow for comparisons across groups. For example, a hybrid in the Early test cannot be compared to a hybrid in the Late test. The Early, Medium, Late and White tests were grown at all seven locations for a total of 28 tests. The High Oil tests were grown at two locations.

 

The Early maturity hybrid group in Table 4E, and all subsequent "E" tables, are those hybrids rated by the parent seed company to mature in 112 days or earlier.

 

The Medium maturity hybrid group in Table 4M, and all subsequent "M" tables includes those hybrids rated by the parent seed company to mature in 113-117 days.

 

The Late maturity hybrid group in Table 4L and all subsequent "L" tables include those hybrids rated by the parent seed company to mature in 118 days or later.

 

The White hybrid group in Table 4W and all subsequent ”W” Tables includes those hybrids with a white seed coat and rated by the parent seed company to mature in 112 to 118 days.

 

The High Oil hybrid group in Table 16 includes those hybrids with the TopCross Blend trait.

 

Open-pedigree hybrids of known maturity were included in each Early, Medium, and Late test, to provide an internal evaluation of hybrid maturity. The seed of these hybrids was obtained from Illinois Foundation Seeds, Inc., at Champaign, IL.

 

Grain moisture of hybrids in the Early, Medium, and Late tests should be within the LSD of the check hybrid grain moisture for that test. Hybrids with grain moisture above the LSD of the check hybrid likely belong in a later-maturing test. Each hybrid is placed in the Early, Medium, and Late tests based on the hybrid maturity defined by the company.

 

Notes about the 2005 growing season follow Table 3.

 

CHEMICAL ANALYSIS OF THE EARLY, MEDIUM, LATE, AND WHITE TESTS

Grain chemical composition was measured from one replication of each Early, Medium, Late and White maturity test at each location. These samples were analyzed by the Kentucky Grain Quality Laboratory at Lexington1 using NIRS. The NIRS analysis provided evaluation of protein, starch, and oil and is presented in Tables 8 and 16 for grain at 0% moisture.

 

Since grain used in feed rations contains moisture, the composition variables provided in Table 8 and 16 should possibly be used at a moisture content that is different than 0%. A suitable moisture in most feed rations is 15%. To covert to 15% moisture, multiply the values in Tables 8 or 16 by 0.85. For any other moisture content, multiply the values by (100-%moisture)/100.

 

HIGH OIL TESTS

Six high oil hybrid blends (TC High Oil Blend®) were tested at two locations with three replications per location. The two location average yield data is available in Table 16D. A 20 to 25 plant hand pollinated sample from each replication of the Lexington test was analyzed for chemical composition. The chemical composition values presented in Table 16F are given for grain at 0% moisture.

 

 

ACKNOWLEDGEMENTS

The authors sincerely appreciate efforts of the Kentucky Corn Growers Association in helping upgrade equipment. A Massey Ferguson MF 8-XP combine was leased to the corn project at minimal cost by the Kentucky Corn Promotion Council of the Kentucky Corn Growers Association. This combine contributed to improved accuracy of the data.

 

The authors are grateful to Dr. Michael Montross, Wei Chen (Research Analyst) and the Kentucky Corn Growers Association for the Grain Quality Laboratory, which processed more than 1000 grain samples. The authors are grateful to the following farmer-cooperators who not only provided land for testing but helped with the tests throughout the growing season: Dennis and David Joseph and family of Benton, Dale Tucker and family of Bowling  Green, Steve Sheffer and family of Hodgenville and Tim Thomas and family of Waverly, KY.

 

The authors - acknowledge the statistical and programming support of Dr. Paul L. Cornelius and Mr. Danny Walls of the Agronomy Department.

 

Additional acknowledgements are made to the following people who helped conduct this year's performance test.

 

Richard C. Green, Research Technician, Dept. of Agronomy, Lexington, KY

Dr. James Herbek, Extension Specialist in Grain Crops, Research and Extension Center, Princeton, KY

Donnie Davis, Superintendent, and Joe Williams, Farm Manager. Research and Education Center, Princeton, KY

David Ditsch Superintendent, and Wade Turner, Farm Manager, Robinson Substation, Quicksand, KY

Dennis Duross, Communication Specialist, Agricultural Communications, Lexington, KY.

Lincoln Martin, Extension Agent, Marshall County, KY

Joanna Coles, Extension Agent, Warren County, KY

Rankin Powell, Extension Agent, Union County, KY

David Harrison, Extension Agent, LaRue County, KY

 

1 The Grain Quality Laboratory is a service provided by the University of Kentucky with funding from the Kentucky Corn Growers Association.

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TABLE 2. HYBRIDS TESTED IN 2005

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Company

Hybrid

Trait*

Test**

Color

CRM***

 

 

 

 

 

Adler Seed

5805

 

E

Yellow

111

6085 W 550 N

6105

 

E

Yellow

112

Shaprsville, IN 46068

8210

YGCB

M

Yellow

114

 

 

 

 

 

AgriGold Hybrids

A6445

CL

E

Yellow

109

RR#1 Box 203

A3411

 

E

Yellow

111

St. Francisville, IL 62460

A6575

BT

E

Yellow

112

A6633

BT

M

Yellow

115

A6647

 

M

Yellow

115

A6622

 

M

Yellow

115

A3325

 

L

Yellow

118

A6537W

 

W

White

113

A3429W

 

W

White

115

HO-A6395

TC

HO

High Oil

107

HO-A6490

TC

HO

High Oil

112

HO-A6445

TC

HO

High Oil

112

 

 

 

 

 

Belle Southern Hybrids

BELLE 1824R

RR

M

Yellow

114

P.O. Box 9

BEXRY455

 

M

Yellow

114

Waldenburg,AR 72475

BELLE1515C

 

M

Yellow

115

BELLE1525R

RR

M

Yellow

115

BELLE1533Y

BT

M

Yellow

115

BELLE1545RY

RR,YG

M

Yellow

115

BELLE1830Y

BT

L

Yellow

118

 

 

 

 

 

Beck's Hybrid

6599

CBRR

M

Yellow

113

6767 E 276 ST

6722

RR

M

Yellow

114

Atlanta, IN 46031

 

 

 

 

 

 

 

 

 

 

Bio-Gene Seeds

BG1115

 

E

Yellow

111

5477 Tri County Hwy

BG1128

 

E

Yellow

112

Sardina, OH 45171

BG1132

 

M

Yellow

113

CB1143

CB

M

Yellow

114

RR/CB1163

RR/CB

M

Yellow

116

 

 

 

 

 

Brodbeck Seeds

SX512

 

E

Yellow

111

10710 E. 256 ST.

SX2511

YGCB

M

Yellow

113

Cicerd, IN 46034

 

 

 

 

 

 

 

 

 

 

Campbell Seed

6980

CL

M

Yellow

113

1375 N 800 W

7110

R2

M

Yellow

113

Tipton, IN 46072

6940

 

M

Yellow

113

7700

R2

M

Yellow

114

 

 

 

 

 

Caverndale Farms Inc.

CF788

RR2

E

Yellow

112

1921 Bluegrass Pike

CF890

RR2/YGCB

M

Yellow

116

Danville, KY 40422

CF884

 

M

Yellow

116

CF1015

RR2

L

Yellow

120

 

 

 

 

 

Croplan Genetics

691

BT/LL

E

Yellow

112

P.O.Box 64281 MS5850

721TS

CRW/BT/RR

M

Yellow

113

St. Paul, MN 55164-0281

751

RR2/BT

M

Yellow

113

799

BT

M

Yellow

117

895

BT

L

Yellow

120

 

 

 

 

 

Crows Hybrid Corn Co.

4911B

B

E

Yellow

110

P.O. Box 152

51131

B

M

Yellow

113

Kentland, IN 47951

6620B

B

M

Yellow

113

4963B

B

M

Yellow

113

 

 

 

 

 

UAP Mid South

5545

 

E

Yellow

112

57 Germantown Ct Suite 200

57P46

RR/YG

E

Yellow

112

Cordova,TN 38018

57P69

RR YG

E

Yellow

112

3712

 

E

Yellow

112

57F87

YG

M

Yellow

114

57K14

RR

M

Yellow

114

57P12

RR YG

M

Yellow

115

58P59

RR/YG

M

Yellow

116

5516

RR

M

Yellow

116

 

 

 

 

 

Garst Seed Co.

8450

IT

E

Yellow

111

2369 330Th Street

8350

YG1

M

Yellow

116

P.O. Box 500

8292

YG1

L

Yellow

118

Slatea, IA 50244

 

 

 

 

 

 

 

 

 

 

Gateway Seed Co.

4415

YGCB

M

Yellow

115

5517 Van Burew Rd.

2416

YGCB

M

Yellow

116

Nashville, IL 62263

 

 

 

 

 

 

 

 

 

 

Golden Harvest

H-9006

BT

E

Yellow

111

P.O. Box 248

H-8959

BT

E

Yellow

111

Pekin, IL 61555

H-8920

 

E

Yellow

112

H-9107

 

E

Yellow

112

H-9247

BT

M

Yellow

113

H-9166

 

M

Yellow

113

H-9563

BT

M

Yellow

116

H-9657

 

M

Yellow

116

 

 

 

 

 

LG Seeds, Inc.

LG2585

 

E

Yellow

111

22827 Shissler Rd.

LG2540

BT

E

Yellow

112

Elmwood, IL 61529

LG2600

BT

E

Yellow

112

LG2633

BT

M

Yellow

113

LG2625

BT

M

Yellow

114

LG2691

CL

M

Yellow

116

 

 

 

 

 

Miles Seed

W6578

YGCB, CL

E

Yellow

110

P.O. Box 22879

W7307

YGCB/RR

E

Yellow

112

Owensboro, KY 42304

W8720

 

M

Yellow

114

W8607

YGCB/RR

M

Yellow

114

ES414

 

M

Yellow

114

Ho-7185

 

HO

Yellow

110

Ho-W9546

 

HO

Yellow

112

Ho-W7355

 

HO

High Oil

112

 

 

 

 

 

Monsanto

DKC60-19

RR2/YGCB

E

Yellow

110

800 N.Lindbergh Blvd.

DKC61-45

RR2/YGCB

E

Yellow

111

St. Louis, MO 63167

DKC61-72

RR2

E

Yellow

111

RX715RR2

RR2

E

Yellow

111

DKC63-81

RR2/YGCB

M

Yellow

113

DKC66-21

YGCB

M

Yellow

116

DKC69-71

RR2/YGCB

L

Yellow

119

RX818W

 

W

White

115

 

 

 

 

 

Mycogen Seeds

2T780

HX

E

Yellow

112

9330 Zionsville Rd.

2H789

CL

E

Yellow

112

Indianapolis, IN 46268

2J774

HX

M

Yellow

113

2J787

 

M

Yellow

114

 

 

 

 

 

Syngenta Seeds

N65-M7

 

E

Yellow

109

535 Pennyrile Dr.

N69-P9

 

E

Yellow

110

Madisonville, KY 42431

N70-T9

 

E

Yellow

112

Att. Les Radford

N76-H2

 

M

Yellow

113

N76-D3

 

M

Yellow

113

 

 

 

 

 

Pioneer Hi-Bred International

34B24

YGCB

E

Yellow

110

7501 Memorial Pkwy,SW; Suite 205

33N56

 

E

Yellow

112

Huntsville,AL 35802

33M54

 

M

Yellow

114

33P67

YGCB

M

Yellow

114

33R77

 

M

Yellow

114

33R78

YGCB

M

Yellow

114

33V15

 

M

Yellow

114

33Y45

 

M

Yellow

115

32D99

 

L

Yellow

118

31G66

 

L

Yellow

118

31N28

YGCB

L

Yellow

119

33V62

 

W

White

114

32B10

 

W

White

115

32T78

 

W

White

116

32R38

 

W

White

117

 

 

 

 

 

Seed Consultants Inc.

SC10B94

 

E

Yellow

108

P.O. Box 370

SC1124A

 

E

Yellow

111

Washington C.H., OH 43160

SC11B40

 

M

Yellow

113

SC11B45

 

M

Yellow

115

SC11B46

 

M

Yellow

115

SC11B55

 

M

Yellow

115

SC1176

 

M

Yellow

116

SC1165

 

M

Yellow

116

 

 

 

 

 

Southern States Corp.

SS605

CL

E

Yellow

110

6606 West Broad Street

SS670

BT

E

Yellow

110

Richmond, VA 23260

SS745

CL/YGCB

M

Yellow

115

SS746

RR2/YGCB

M

Yellow

117

SS804

RR

M

Yellow

117

SS849

CL

M

Yellow

117

SS842

RR2/YGCB

L

Yellow

119

 

 

 

 

 

Steyer Seeds

1144

YGCB

M

Yellow

114

6154 No. Co. Rd. 33

1152

YGCB

M

Yellow

115

Tiffin, OH 44883

1153

YGCB

M

Yellow

115

 

 

 

 

 

Trisler Seed Farms Inc.

T-5245

CB

E

Yellow

110

3274 E 800 North Rd

T-5338

CB

M

Yellow

113

Fairmount IL. 61841

T-5337

CB

M

Yellow

113

 

 

 

 

 

Unity Seeds

6250

 

E

Yellow

111

107 Fallon ST.

6296

 

M

Yellow

113

Kentland, IN 47951

 

 

 

 

 

 

 

 

 

 

Royster Clark, Inc.

V52Y41

YGCB

E

Yellow

111

717 Robinson Road S.E.

V56Y51

YGCB

M

Yellow

115

Washington C.H., OH 43160

V58Y41

YGCB

L

Yellow

118

 

 

 

 

 

Syngenta Seeds, Inc

WX7314

 

W

White

113

340 Southside Drive

1713W

 

W

White

114

Henderson,KY 42420

1851W

 

W

White

118

1863W

 

W

White

118

 

 

 

 

 

Illinois Found. Seeds, Inc.

Early Check

 

E

Yellow

112

P.O.Box722

Medium Check

 

M

Yellow

115

Champaign, IL 61820

Late Check

 

L

Yellow

119

 

 

 

 

 

 

*Trait:

BT = corn borer resistance

BTCB = corn borer resistance

BTRW = corn rootworm resistance

CB = corn borer resistance

CL = Clearfield Corn (Lightning herbicide tolerance)

CRW = corn rootworm resistance

HX = Herculex (corn rootworm resistance)

IT = imidazolinone tolerance (Lightning herbicide tolerance)

LL = Liberty Link (Liberty herbicide resistance)

RR = Roundup Ready Corn (glyphosate tolerance)

RR2 = Roundup Ready Corn 2 (new event, glyphosate tolerance)

TC = TopCross corn (high oil)

YG = YieldGard (corn borer resistance)

YGBT = YieldGard (corn borer resistance)

YGCB = YieldGard Corn Borer (corn borer resistance)

YGRW = YieldGard RootWorm (corn rootworm resistance)

TS=Triple stack of traits

 

**Test: E = Early, M = Medium, L = Late, HO = High Oil, W = White

 

***CRM: Cummulative Relative Maturity (days),

Data provided by the seed companies.

 

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Table 3. - AGRONOMIC INFORMATION PERTAINING TO 2005 TEST LOCATIONS

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Location and Cooperator

Soil Type

Fertilizer

lbs/acre

Herbicide

Insecticide

Planting Dates

Harvest Dates

Previous Crop

1)

Benton, KY

David & Dennis Joseph, Farm

Grenada

N

P2O5

K2O

185

165

0

Balance

Roundup

Steadfast

Harness

Atrazine

Warrior T

Force 1.5G

April 18

Sept. 20 & 21

soybean

2)

Princeton, KY Western Kentucky Res. & Ed. Center

Huntington Silt Loam

N

P2O5

K2O

185

100

50

Bicep II Magnum

Gramoxone

Force 1.5 G

April 19 & 20

Sept. 19 & 20

soybean

3)

Waverly, KY

Running T Farm

2259 ST RT 141N

Morganfield, KY

Memphis Silt Loam

N

P2O5

K2O

200

92

120

Harness Extra

Celebrity

Force 1.5 G

April 10&11

Sept. 8 & 9

soybean

4)

Bowling Green, KY

Tucker Farm

Pembroke

N

P2O5

K2O

215

80

32

Atrazine

Roundup Max

Steadfast

Force 1.5G

Regent

April 17

Sept. 13 & 14

soybean

5)

Hodgenville, KY Steve Sheffer Farm

Elk

N

P2O5

K2O

175

80

80

Roundup

Atrazine

Princep

Warrior

Force 1.5G

April 28

Sept. 28

soybean

6)

Lexington, KY

K.A.E.S.

Spindletop Farm

Maury Silt Clay Loam

N

P2O5

K2O

200

0

100

Bicep II Magnum

Exceed

Force 1.5G

May 2 & 3

Sept. 22 & 23

soybean

7)

Quicksand, KY

Robinson Forest Station

Phil Silt Loam

N

P2O5

K2O

160

0

0

Bicep II Magnum

Exceed

Force 1.5 G

May 6

Oct. 4 & 5

wheat

NOTES on the 2005 GROWING SEASON:  In general, lodging was more notable this year, likely due to the weather conditions.

BENTON: There was late season weed problem but little corn borer pressure at this location.

PRINCETON: There was very little weed or corn borer pressure at this location.

BOWLING GREEN: There was <10% Southwestern corn borer damage and excellent weed control.

WAVERLY: There some moderate late season weed problem and no corn borer pressure.

HODGENVILLE: There was no damage due to Southwestern corn borer and excellent weed control

LEXINGTON: There were no pest problems at this location and weed control was excellent but severe drought conditions.

QUICKSAND: This location had no damage due to Southwestern Corn borer. There was a late season infestation of vines which were severe in the alleys.

 

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Last Updated: Thursday December 15, 2005.

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