North Carolina measured crop performance corn and corn silage

(1)

The North Carolina Agricultural Research Service to

Conduct performance tests, including interpretation of

data to the public, and does not imply endorsement

or recommendation by North Carolina State University.

Any use of data or information presented in this

(2)

;(ORTH CAROLINA

MEASURED CROP PERFORMANCE

CORN AND CORN SILAGE 2000

D. T.Bowman

Official Variety Testing

Department ofCrop Science

North Carolina State University

(3)

INTRODUCTION •••••••••••••••••••.••••••••••••••••••••.•••••••• 1

Comparing Hybrids 2

Figure 1. Location of Official Variety Tests 4

Cooperators 5

CORN HYBRIDS

Entries

Table 1. Name and Contact Person for Sponsoring

Agencies .

5

6

Field Plot Technique 7

Seasonal Condi tions 8

Data 8

Results 9

Weather Data 10

Table 2. Cultural Practices 17

Table 3. Soil Test Results 18

Tables 4-6. Statewide Average Performance 19

(4)

TABLE OF CONTENTS

CORN SIlAGE 24

Entries 24

Table 10. Name and Contact Person for Sponsoring

Agencies 24

Field Plot Technique 25

Table 11. Cultural Practices 26

Table 12. Soil Test Results 26

Seasonal Condi tions 26

Data 26

Results 26

Weather data 27

(5)

PERFORMANCE OF CORN AND CORN SILAGE

IN NORTH CAROLINA

INTRODUCTION

with the large number of commercially available and

prospective hybrids of corn, it becomes difficult for growers to

select a superior variety suited for their particular area of the

state and their individual farming operations. To make this

decision, the growers need up-to-date, unbiased, reliable

information. The Official Variety Testing Program, through this

report, seeks to provide that type of information.1

This report is concerned with corn hybrids in all production

areas of the state. The second section deals with corn silage.

Both sections are complete in that they contain information on

experimental procedure, location of the tests, a discussion of the

data for 2000,2 as well as summary tables for the past two and

three years.

It is hoped that the organization of this bulletin will

provide data in a complete form to those interested in the various

crops.

Growers are cautioned against making varietal selection

decisions based on an individual location in anyone year. True

lThe Official Variety Testing Program recognizes the cooperative spirit and civic-minded service rendered by the farmers who have furnished, prepared, and cultivated the land for these trials. Research technicians, Dwight Parrish, Ken Barnes, Johnny Denton, and Phil Johnson assisted in conducting these tests. Jane Dove Long prepared the text for this bulletin.

(6)

2

varietal performance may have been masked by the unusual weather

conditions experienced at anyone location or anyone growing

season.

Comparing Hybrids

Performance of a hybrid cannot be tested with absolute

precision. Although the tests are conducted in a uniform manner,

as much as possible, uncontrollable variability exists among

experimental plots due to soil type, fertility, moisture, insects,

diseases, and other sources of variation. Because this variability

exists, statistics are used as a tool to determine differences

among hybrids. The size of chance variation is listed in each

table as the L.S.D. (least significant difference) and those

hybrids which do not differ by more than the L.S.D. are

statistically not different. Those hybrids that do differ by more

than the L.S.D. are statistically different. The Bayes L.S.D. at

the K-ratio of 50 (approximately .10 level of probability) was

used.

The coefficient of variability (C.V.) is listed as a general

indicator of population variability; it does not, however, always

indicate level of precision. The coefficient of determination (R2

)

is a better measure of the level of precision because it indicates

the amount of variation accounted for in the trial. The higher the

R2

value, the more precise the trial. Thus , relative precision

among various trials can be compared. The standard error of the

mean (soe.) is listed as a general indicator of precision since it

reveals how well the true mean was estimated. The formula for the

(7)

root of the number of replications. The error degrees of freedom

(Error d.f.) used to test varieties or hybrids is listed along with

the mean of the test.

The hybrids which do not yield significantly less than the

highest yielder are denoted by an asterisk (*) next to their

yields; the highest yielder is denoted by a double asterisk (**)

next to its yield. other agronomic characteristics may be as

equally important as yield.

Based on extensive study of the data over 10 years, the most

useful data sets to use in choosing medium-maturing corn hybrids

are one-year multi-location averages. This one-year average

provides the best prediction of the following year performance

while including the latest released hybrids. For early-maturing

and full-season hybrids, the two-year averages across locations

provide the best data set to examine in choosing hybrids.

It is suggested that the grower plant a small number of acres

(8)

LOCATION OF OFFICIAL VARIETY TESTS

+CORN

*CORN SILAGE

(9)

COOPERATORS 2000

Bertie county, Peanut Belt Research station, Lewiston, N.C.

steve Barnes, Superintendent.

Columbus county, Border Belt Research station Whiteville, N.C.

Ty Marshall, Superintendent.

Edgecombe County, Upper Coastal Plain Research Station,

Rocky Mount, N.C. Clyde Bogle, Superintendent.

Johnston County, San Wood Farms, Route 2, Four Oaks, N.C.

Lenoir county, Lower Coastal Plain Tobacco Research Station,

Kinston, N.C., Sandy Barnes, Superintendent.

Rowan county, Piedmont Research Station, Salisbury, N.C.,

Raymond Coltrain, Superintendent.

Sampson County, Horticultural Crops Research Station,

Clinton, N.C., Jimmy Prince, Superintendent.

Washington county, Tidewater Research Station, Plymouth, N.C.,

John Smith, Superintendent.

Corn silage

Haywood County, Mountain Research Station, Waynesville, N.C.

Bill Teague, Superintendent.

Rowan county, Piedmont Research Station, Salisbury, N.C.

Raymond Coltrain, superintendent.

CORN HYBRIDS

The performance of various corn hybrids in different areas of

the state depends on their adaptation to the environmental

conditions within the area. The performance of hybrids across the

state in three geographic regions of North Carolina is reported in

this bulletin.

Entries: Any individual or firm may make application for

having hybrids tested. A fee is charged on an entry basis.

Personnel of the testing program may also include entries about

(10)

6

Early in January each year, rules governing the tests for the

ensuing year are distributed to all previous participants and to

those who make inquiry.

Agencies or individuals entering hybrids in the Official

variety Tests were requested to designate the population and

maturity range desired. Because of this, some hybrids may not

appear to be in the correct maturity group.

Agencies sponsoring entries in the 2000 tests are shown in

Table 1.

Table 1. Name, contact person, and address of sponsoring agencies in the 2000 North Carolina Corn Performance Trials along with designation used to identify the hybrids.

AgencY,Contact person and address

Doebler's PA Hybrids James Breining

RR 1, Box 424

Jersey Shore, PA 17740 (800) 853-2676

Garst/Aqripro Seeds, Inc. Al Hoggard

761 Walnut Knoll Lane suite 200

Memphis, TN 38018 (901) 844-7340

Monsanto Diane Freeman

3100 Sycamore Road DeKalb, IL 60115

(815) 758-9323

Designation

Doebler's 747XY 851XY 887VZ

Agripro AP 9939

HS 9843 HY 9646 Garst 8220 8222 IT 8251 IT 8251 IT 8342 IT 8366 IT 8464 IT

Asgrow RX 637 RX 708 RX 889

DeKalb DK 567

(11)

Table 1 Continued

Agency, Contact Person and address

Novartis Seeds. Inc.

Carroll Oakes PO Box 1240

winterville, NC 28590 (252) 746-3004

Pioneer Hi-Bred International. Inc.

Dennis McCoy 435 E Smith Ave Winterville, NC 28590

(919) 355-2017

Southern States Coop.

Danny Dillon PO Box 26234 Richmond, VA 23260

(804) 281-1253 Designation Novartis N63-G7 N75-K6 N75-T2 N79-L3 N83-N5 N 8811 N91-R9 Pioneer 3163 31B13BT 31G20 31G98 31R88 3223 32K61 3394 33G26 33J56 33K81 33Y09BT 34A55LL 34T14BT/LL SS 710 729CL 849CL 859CL 900BT Exp 78351 78406 80000

Field Plot Technique: Tests were planted at eight locations across

the state. The various locations are shown in Figure 1. In the

Tidewater the test was located in Washington County on organic soil

(HM). In the Coastal Plain region, six tests were conducted in Bertie,

Columbus, Edgecombe, Johnston, Lenoir, and Sampson counties. Two

tests were located in Sampson county; one was planted earlier than

normal and served as a test for seedling vigor, and one was planted at

a date more typical of corn planting for the area. In the Piedmont,

(12)

Early-8

maturing corn hybrids (less than 115 days to maturity) are included in

the Coastal Plain and Tidewater areas of the state. The medium

maturing (approximately 115 to 125 days to maturity) and the

late-maturing (over 125 days to maturity) hybrids are included in all

trials. It is important to remember that these are loose groupings,

i.e some hybrids may easily fit into either of two maturity groups.

Table 2 lists the cultural practices used and Table 3 lists the soil

tests results. In field design a randomized block was used on all

maturity groups. Each plot consisted of two rows 22 feet long with a

30, 38, or 36" row width. The two rows were harvested for yield.

Alley width was six feet.

In 2000, all tests were planted to a stand at a rate of 110% of

the desired plant population. Actual plant populations are reported

in the across locations tables.

Seasonal Conditions: Planting was on time for most locations

(Table 2). Table 2 only includes information on the trials that were

actually harvested for data. The seedling vigor test was planted

March 18 with warm spring weather immediately following planting

resulting in nearly 100% stand, i.e. no difference among hybrids. Dry

weather was experienced at most locations during May and June (see

accompanying graphs) and in July at Bertie and Washington counties.

The Lenoir county test was irrigated one time; the Rowan county test

was irrigated six times for a total of 5 inches. Harvest was slightly

delayed due to rains in late August and early September.

Data: Data were collected on yield, moisture, lodging, ear

height, and stands. All plot yields were adjusted to 15.5% moisture.

(13)

the ear or leaning more than 45 degrees. Ear height was determined by

measuring the distance from the ground to the node where the ear is

attached to the stalk. Stand counts were reported in plants/acre.

Results:. statewide data for all three maturity groups for 2000 are presented in Table 4, 5, and 6; multi year data are

reported in Tables 7, 8, and 9. Yields averaged 71 bula at Bertie

county to 182 bula at Lenoir county for the early hybrids, 103 bula

at Bertie county to 182 bula at Lenoir county for medium hybrids,

and 114bu/a at Bertie county to 179 bula at Columbus county for the

full season hybrids. This would indicate a wide range of

(14)

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(16)

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(17)

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(18)

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(20)

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-Fertilizer Date Date

Location Lbs/A Sidedressing of of Soil

by County and Grade Lbs N/A Planting Harvest Type

Ile.J.:ti.e. 100 130 10-Apr September 14 Goldsboro

0-0-60 sandy loam

80 18-46-0

Columbus 350 116 7-Apr September 12 Norfolk fine

5-10-30 sandy loam

Edaecombe 700 130 II-Apr August 29 Norfolk

5-10-10 loamy sand

Johns'ton 300 150 8-Apr September 8 Norfolk ~

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5-10-30 sandy loam

Lenni.1: 300 165 6-Apr September 11 Lynchburg

10-20-20 sandy loam

RmtlaJl 360 140 3-May September 29 Davidson

10-20-20 clay

.8aIDp.arm 125 165 II-Apr September 13 Norfolk

10-46-0 sandy loam

200 0-0-60

Washinat:.on 300 130 12-Apr September 15 Portsmouth fine

(22)

Table 3. Soil test results, corn - 2000.

Location

by County HM% W-V CEC as % Ac pH P-I K-I Ca % Mg % Mn-I Zn-I Cu-I

Berl.i.e 0.60 1.28 4.5 78 1.0 6.1 40 45 58 15.0 48 37 103

Columbus 0.36 1.20 2.4 75 0.6 6.0 67 67 48.0 14.0 41 51 47

Edaecombe 0.41 1.29 5.7 89 0.6 6.2 36 67 63.0 21.0 56 49 93

John5:tQll 0.66 1.18 2.5 72 0.7 6.3 262 39 53.0 13.0 49 47 21

I&JlQll 1.25 1.25 5.3 81 1.0 6.1 101 59 55.0 22.0 32 65 35

&nl.aJl 0.13 1.15 7.8 82 1.4 5.6 46 66 56.0 23.0 1515 70 177

~ 2.15 1.37 6.9 90 0.7 6.3 48 88 57.0 26.0 31 76 30

~

(23)

TABLE 4. STATEWIDE AVERAGE PERFORMANCE OF EARLY-MATURING CORN HYBRIDS - 2000.

HYBRID OR BRAND-HYBRID

YIELD

BUIA MOISTURE

lODGING EAR HT

% IN PLANT POPULATION Pioneer 3223 Agripro HY9646 DeKalb DKC61-24 DeKalb DK650 Novartis NK N79-l3 Pioneer 34T14BT\ll Pioneer 33Y09BT Pioneer 3394 Garst 82511T DeKalb DKC65-25 Agripro HS9843 Pioneer 33J56

Southern States SS710 Novartis NK N75-T2 Pioneer 34A55ll Pioneer 32K61 Asgrow RX637 Asgrow RX708 DeKalb DK611 Novartis NK N75-K6 Pioneer 33G26 DeKalb DK567 Novartis NK N63-G7 Pioneer 33K81

+Southern States SSEXP80000 +Southern States SS78351 Doebler's 747XY Garst 83661T Garst 83421T Garst 84641T DeKalb DK579 162** 149 147 147 146 143 142 142 142 142 141 141 141 141 140 139 139 139 137 137 137 136 134 132 131 129 129 124 121 118 117 0.188 0.190 0.179 0.193 0.190 0.182 0.184 0.177 0.191 0.187 0.189 0.181 0.176 0.191 0.179 0.186 0.171 0.178 0.182 0.188 0.185 0.174 0.178 0.183 0.195 0.180 0.191 0.185 0.188 0.184 0.180 1 2 1 2 2 1

o

1 1 1 1 2 1

o

1 2 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 42 43 39 38 37 38 39 41 43 34 39 38 41 37 36 39 38 36 41 38 40 37 38 32 35 35 36 35 34 37 32 26,518 26,826 27,377 26,602 24,826 26,789 24,853 26,994 26,013 25,256 27 , 181 26,013 25,929 24,238 26,882 26,032 27,461 27,134 26,742 22,332 25,845 27,041 26,873 25,602 24,247 25,920 24,686 23,556 24,913 24,210 27,536 MEAN 138

C. V. (%) 9.8

BlSD (K-50) 13

S. E. 2.3

Adj. R2

(%) 90.3

Error D. F. 180

(24)

20

TABLE 5. STATEWIDE AVERAGE PERFORMANCE OF MEDIUM-MATURING CORN HYBRIDS - 2000.

HYBRID OR YIELD lODGING EAR HT PLANT

BRAND-HYBRID BUIA MOISTURE % IN POPULATION

DeKalb DK697 164** 0.209 2 42 27,083

Pioneer 31B13BT 162* 0.202 1 41 25,407

Pioneer 31G98 161* 0.200 1 42 25,714

Southern States SS900BT 160* 0.216 1 40 24,998

Pioneer 3163 158* 0.212 2 41 26,477

+Southern States SSEXP78406 158* 0.204 2 43 25,147

Garst 8222IT 152 0.213 2 41 24,549

Southern States SS 729Cl 150 0.187 2 43 25,454

Novartis NK N83-N5 148 0.204 1 45 22,535

Pioneer 31G20 147 0.213 1 39 26,147

DeKalb DK687 145 0.205 1 39 25,494

Doebler's 851XY 142 0.202 2 42 23,125

Pioneer 31R88 141 0.216 1 41 25,266

Doebler's 887V2 138 0.233 2 37 24,605

Asgrow RX889 138 0.212 1 36 26,005

Garst 8220 135 0.233 2 39 20,702

MEAN 149

C. V. (%) 7.1

BlSD (K-50) 9

S. E. 1 .7

Adj. R2

(%) 90.0

Error D. F. 119

(25)

TABLE 6. STATEWIDE AVERAGE PERFORMANCE OF lATE-MATURING CORN HYBRIDS - 2000.

HYBRID OR YIELD lODGING EAR HT PLANT

BRAND-HYBRID BUIA MOISTURE % IN POPULATION

Novartis NK N91-R9 150** 0.230 2 48 20,820 Novartis NK N8811 150** 0.228 1 36 23,904

Agripro AP9939 148* 0.224 1 40 23,881

MEAN

C. V. (%) BlSD (K-50)

S. E.

Adj. R2

(%) Error D. F. **Highest yielder.

149 6.9 11

1 .6

91.0 14

(26)

22

TABLE 7. MULTI-YEAR DATA COMBINED OVER LOCATIONS FOR EARLY-MATURING CORN HYBRIDS.

HYBRID OR YIELD MOISTURE LODGING EAR HT PLANT

BRAND-HYBRID BUIA % IN POPULATION

THREE YEAR AVERAGE - 1998, 1999, 2000

Pioneer 3223 147 0.195 3 44 26,339

Pioneer 33Y09BT 133 0.188 2 39 25,672

Pioneer 34A55LL 133 0.182 2 36 26,693

Agripro HY9646 132 0.197 2 44 25,346

Pioneer 3394 131 0.182 2 40 26,430

Pioneer 32K61 129 0.191 2 39 26,159

Pioneer 33G26 128 0.191 2 40 25,766

Agripro HS9843 125 0.196 1 41 25,547

TWO YEAR AVERAGE - 1999, 2000

Pioneer 3223 149 0.197 1 43 26,610

Novartis NK N75-T2 138 0.199 1 37 24,487

DeKalb DK650 138 0.199 3 38 25,982

Agripro HY9646 135 0.200 1 43 26,167

Pioneer 33J56 135 0.190 2 37 26,166

Pioneer 34T14BT\LL 134 0.189 0 37 26,626

Pioneer 33Y09BT 132 0.191 0 38 25,360

Pioneer 34A55LL 131 0.186 1 35 26,815

Agripro HS9843 130 0.200 1 39 26,365

Pioneer 32K61 130 0.194 1 38 26,231

DeKalb DK611 129 0.189 1 40 25,822

Pioneer 3394 129 0.185 1 39 26,480

Novartis NK N63-G7 128 0.185 1 38 26,224

Pioneer 33G26 128 0.194 1 39 25,910

Doebler's 747XY 124 0.201 1 35 25,333

Pioneer 33K81 121 0.189 2 32 25,089

(27)

TABLE 8. MULTI-YEAR DATA COMBINED OVER LOCATIONS FOR MEDIUM-MATURING CORN HYBRIDS.

BRAND-HYBRID BUIA % IN POPULATION

Pioneer 31B13BT 145 0.203 3 43 25,441

Pioneer 3163 142 0.206 3 41 25,700

DeKalb DK687 129 0.203 2 41 24,591

Novartis NK N83-N5 129 0.203 3 45 23,053

Pioneer 31G20 129 0.213 2 40 25,538

Pioneer 3163 150 0.213 3 40 26,435

DeKalb DK697 148 0.212 3 40 25,958

Pioneer 31B13BT 148 0.206 1 42 25,767

Garst 8222IT 140 0.217 2 39 26,011

Southern States SS 7 136 0.193 2 42 25,800

Pioneer 31G20 135 0.215 1 38 26,226

DeKalb DK687 135 0.206 2 39 24,935

Novartis NK N83-N5 134 0.209 2 44 23,106

Doebler's 851XY 130 0.205 2 41 23,865

Asgrow RX889 128 0.213 1 34 25,247

TABLE 9. MULTI-YEAR DATA COMBINED OVER LOCATIONS FOR LATE-MATURING CORN HYBRIDS.

BRAND-HYBRID

aUlA

% IN POPULATION

Agripro AP9939 128 0.225 2 41 23,723

Novartis NK N8811 140 0.234 1 35 24,004

(28)

24

CORN SILAGE

Silage is an important part of the beef and dairy cattle

industry in North Carolina, particularly in the Piedmont and

Mountain regions.

The report presents the results of the North Carolina Official

Corn Silage trials for the 2000 season.

Entries: Any individual or firm may make application for

having hybrids tested. Personnel of the testing program may also

include entries about which further information is desired.

Early in January each year, rules governing the tests for the

ensuing year are distributed to all previous participants and to

those who make inquiry.

Agencies sponsoring entries in the 2000 tests are shown in

Table 10.

Table 10. Name, contact person, and address of sponsoring agencies in the 2000 North Carolina Corn Silage Performance Trials along with designation used to identify the hybrids in the trials.

Name, Contact Person and Address

Doebler's Hybrids. Inc. James Breining

RR 1, Box 424

Jersey Shore, PA 17740 (570) 753-3210

Monsanto Diane Freeman 3100 Sycamore Road DeKalb, IL 60115

(815) 758-3461

Novartis Seeds. Inc. Carroll Oakes

PO Box 1240

Winterville, NC 28590 (252) 746-3004

Hybrid/Designation

Doebler's 859XY 5807Q

Asgrow RX 938 Dekalb DK 697 DK 743

(29)

Table 10. (Continued) .

Name, Contact Person and Address

pioneer Hi-Bred Intnl. Inc.

Dennis McCoy 435 E. smith Ave Winterville, NC 28590

(919) 355-2017

Southern States

Danny Dillon PO Box 26234 Richmond, VA 23260

(804) 281-1253

Field Plot Technique:

Hybrid/Designation

Pioneer 3085 3156 31G20 31G98 31R88 32K62BT 33J56

SS 897 849CL 859CL 1150

One test was located in Haywood County

in a creek bottom and one in Rowan County on an upland soil planted

no-till on 30" rows.

Plots consisted of two rows with both rows harvested. six

replicates at Haywood and Rowan were planted in a randomized,

complete block design.

alleys.

Plots were 22 feet long with six foot

All plots were over-planted and later thinned to the desired

stand.

Table 11 lists the cultural practices used; Table 12 lists soil

(30)

26

Table 11. Cultural practices used on the corn silage tests - 2000.

Fertilizer Soil Date Date

Location lbs/A and Type of of

by County Grade Planting Harvest

Haywood 700 Codorus May 15 September 20

23-12-11 Loamy

Rowan 360 Davidson May 3 August 21

10-20-20 Clay

140 lbs N/A sidedressing

Table 12. Soil test results, corn silage - 2000.

Location HM%

w-v

CEC as % Ac pH P-I

by County

Haywood 1.37 1.02 9.3 88 1.1 6.0 47

Rowan 0.13 1.15 7.8 82 1.4 5.6 46

Table 12. (Continued) .

Location K-I Ca % Mg% MN-I Zn-I cu-I

by County

Haywood 68 63.0 21.0 604 73 194

Rowan 66 56.0 23.0 1515 70 177

Seasonal Conditions: Planting was on time for Haywood county but

late for Rowan county due to rains in April (Table 11). Rainfall

was below normal in May and most of June for Rowan county (see

accompanying weather chart); supplemental irrigation was applied to

save the test at this location. Harvest date was about normal for

Haywood county but late for Rowan county due to a late planting.

Data: Data were collected on percent dry matter at harvest,

dry matter yield, silage yield, plant population and plant height.

Results: Tables 13 and 14 reveal the three and two year

(31)

WeathertVood Co. Weekly Weather Data

)00)

(May - August 2000)

3 Rainfall

I

~

1 -

2. ₈₀

- - -

- -

--

3 00

I I

3

2

:0

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~

Q)

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....:I

1.5

"':::::

~

0 :::J'" CD

1

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0.5

1. 0. 20

-40

1

2

60

11';_;"1-" L_ : "",,,," .,<!L,,,tr'" i'''''_ ~''''' ', ~J'!

0

U 'I r;-:=jIl'"JI~."~I f _H.\!t'U~ R,H -\1 1!!l.. ~U':,'IL":__"H~.t H!~.lI r;' _:_H :"~, ;;)H~ ,,~3115:~l"'1~ ~II

0

30 6 13 20 27 31 August

7 14 21 28 4 11 18 25 2 9 16 23 30 6 13 20 27 31

(32)

Neather ]van

Co.

Weekly Weather Data

000)

(April - August 2000)

'?2"'" I.""",,"',

0

'''''''''J 'm''' "' (

0

p'~HJO.'jI\111~H,q IL' ....,;'I Ire~"'3jI !!?Z~ _""C__,,,l':I'n!~1,JI ...,... I~'1·1 f~

I

1

3 20

1--

Max Temp ... Min Temp

0 Rainfall

_I

I

3 Rainfall

:100

2.5 : 80

'-A

2

:D

~.

-~

~

~ Ol co

] 60

I

~L~~I---

-,

/

I

1.5

~

0 :::T CD

] 40

I

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1

"'-"(J)

( 20

I I

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0.5

14 21 28 4 11 18 25 31

July August

7 142128 5 12 1926 2 9 1623 30 7 142128 4 111825 31

(33)

TABLE 13. DATA COMBINED OVER LOCATIONS FOR CORN SILAGE HYBRIDS THREE-YEAR AVERAGE - 1998, 1999, 2000.

DRY SILAGE %DRY PLANT

HYBRID OR MATTER YIELD MATTER HEIGHT POPULATION BRAND-HYBRID TONS/A TONS/A AT HARVEST INCHES PLANTS/ACRE

Novartis NKN83-N5 7.4 21.5 38 100 28,000

Pioneer 31G20 7.3 20.3 39 96 28,000

Novartis NKMcNair 508 7.2 20.8 34 106 28,000

Pioneer 3156 7.2 20.5 37 98 28,000

Pioneer 3085 6.8 18.8 33 100 28,000

Southern States SS897 6.6 18.1 36 93 28,445

TABLE 14. DATA COMBINED OVER LOCATIONS FOR CORN SILAGE HYBRIDS. TWO-YEAR AVERAGE - 1999, 2000.

DeKalb DK697 8.8 25.1 39 107 28,000

Pioneer 32K62BT 8.6 25.0 39 108 28,000

Southern States SS849CL 8.5 24.0 36 105 28,667

Pioneer 31G20 8.5 23.7 38 107 28,000

Novartis NKN83-N5 8.4 24.7 37 108 28,000

Southern States SS859CL 8.4 23.4 35 106 28,667

Novartis NKMcNair 508 8.4 24.0 32 119 28,000

Pioneer 3156 8.3 23.4 36 108 28,000

Pioneer 33J56 8.1 23.5 38 106 28,000

Pioneer 3085 7.8 21.9 32 112 28,000

(34)

30

TABLE 15. AVERAGE PERFORMANCE OF CORN SILAGE HYBRIDS - 2000.

DeKalb DK697 7.7** 22.1 38 101 28,000

Pioneer 32K62BT 7.7** 22.1 38 103 28,000

Novartis NK N91-R9 7.5* 21 .1 31 115 28,000

DeKalb DK743 7.4* 21.4 34 102 28,000

Pioneer 31G20 7.4* 20.7 37 100 28,000

Southern States SS 859CL 7.3* 20.7 33 100 28,000

Novartis NK N83-N5 7.3* 21.0 35 102 28,000

Pioneer 31G98 7.3* 20.6 34 101 28,000

Novartis NK McNair 508 7.2* 20.6 30 116 28,000

Asgrow RX938 7.2* 20.4 31 93 28,000

Pioneer 31R88 7.1 * 20.6 33 105 28,000

Southern States SS 849CL 7.1 * 20.3 34 99 28,000

Pioneer 33J56 7.1 * 20.2 37 99 28,000

Pioneer 3156 7.0* 19.7 34 102 28,000

Doebler's 859XY 7.0* 20.3 34 100 28,000

Doebler's S807Q 6.8* 20.3 34 109 28,000

Southern States SS1150 6.6* 19.0 31 118 24,000

Pioneer 3085 6.6* 18.5 30 108 28,000

Southern States SS 897 6.1 17.4 32 98 28,000

MEAN 7.1

C. V. (%) 7.3

BLSD (K-50) 1 .4

S. E. 0.1

Adj. R2 _(%) _79.2

Error D. F. 18