Iowa Corn Yield Tests Extension and Experiment Station Publications

12-1-1984

The 1984 Iowa Corn Yield Test Report, District 5K. E. ZieglerIowa State University

Follow this and additional works at: http://lib.dr.iastate.edu/cornyield

Part of the Agriculture Commons, and the Agronomy and Crop Sciences Commons

This Report is brought to you for free and open access by the Extension and Experiment Station Publications at Iowa State University DigitalRepository. It has been accepted for inclusion in Iowa Corn Yield Tests by an authorized administrator of Iowa State University Digital Repository. Formore information, please contact digirep@iastate.edu.

Recommended CitationZiegler, K. E., "The 1984 Iowa Corn Yield Test Report, District 5" (1984). Iowa Corn Yield Tests. 104.http://lib.dr.iastate.edu/cornyield/104

The 1984 Iowa Corn Yield Test Report, District 5

AbstractResults of the Iowa Com Yield Test are published to aid Iowa farmers in selecting com varieties. This is thesixty-fifth consecutive year for the test.

DisciplinesAgriculture | Agronomy and Crop Sciences

This report is available at Iowa State University Digital Repository: http://lib.dr.iastate.edu/cornyield/104

THE 1984 IOWA CORN YIELD TEST REPORT

District 5 Results of the Iowa Com Yield Test are published to aid Iowa

farmers in selecting com hybrids. This is the sixty-fifth consecutive year for the test.

The presentation of data for the hybrids tested does not imply approval or endorsement by the authors or by the agencies sponsor-ing or conducting the test. Entries in tables I, 2, and 3 are designated by brand name and variety.

1984 Procedure Producers of com seed and Iowa State University were eligible

to enter varieties in the Iowa Com Yield Test. Each producer was allowed a maximum of six entries per district. All entries had to be available in a quantity of at least 10 bushels of seed.

Two hundred thirty-one entries were evaluated in this district-121 in the early to medium maturity test and 110 in the medium to late maturity test. Fifteen of the entries determined to be widely grown were entered by Iowa State University and were planted in both the early and the late test. In June, on even numbered years, approx-imately 21,000 survey cards are mailed in the state. Recipients of these cards are determined by a random drawing of names from landowners listed in the county plat books. Based on the survey results, the 15 hybrids grown on the most acres in the district are classified as widely grown for that district. The widely grown hybrids(*) in this report were determined by the 1982 survey. Iowa State University entered a maximum of three widely grown hybrids of any given brand. These entries were given priority over the remaining 201 entries made by seed producers.

Each entry was replicated four times in four-row plots at a planting rate of 28,000 kernels per acre at each location. All loca-tions were machine-planted. The center two rows of each plot were harvested with a com combine. No gleanings or dropped ears were included in yield data. A moisture determination was made from each plot, and yields were corrected to 15.5 percent moisture for shelled com.

How Information Is Presented The data presented are averages of three locations in 1982, 1983,

and 1984. Yield in bushels per acre and percentage of moisture, root lodging, stalk lodging, dropped ears, and stand are shown for all entries tested in 1984 and for those tested in 1982and1983 that were in the 1984 test. Because of the large number of entries in the

Prepared by K. E. Ziegler, instructor in agronomy.

Cooperative Extension Service, Agriculture and Home Economics Experiment Station, Iowa Crop Improvement Association, and the United States Department of Agriculture cooperating

district, the test was split into two experiments based on maturity of the hybrids entered. Table 1 reports the average yields of hybrids entered in the early to medium maturity experiment and table 2 reports the average yields of hybrids entered in the medium to late maturity experiment. Both experiments were treated similarly.

Interpretation of Results Yield differences due to variation in soil, fertility, moisture

availability, insect infestation, and diseases, plus any variation due to planting and harvesting techniques, are identified through statis-tical analysis. The LSD values shown in tables 1, 2, and 3 represent, in bushels per acre, the amounts of yield variation that could be due to variations in the factors just mentioned. In comparing varieties, yield differences greater than the LSD value can be attributed to genetic differences in the yield potential of these varieties; yield differences less than the LSD value are not statistically different and could have been due to other factors.

Grain moistures shown in tables 1, 2, and 3 are indicators of maturity and natural drying rate. Maturity of varieties entered gener-ally ranged from early to full season. Yield comparisons should be made among varieties of similar maturity in the same test. Hybrid comparisons between table 1 and table 2 can be made only when using the average of the widely grown hybrids listed at the bottom of each table. The difference between these two values indicates the yield difference between the two tests. This difference must be added to or subtracted from the yield of the appropriate hybrid when making comparisons between tables.

It is important to select varieties having stable performance over a range of environmental conditions. High yields for two or more consecutive years indicate stable performance. Supplemental yield and agronomic information about specific varieties may be obtained from your seed com dealers and from neighbors who have grown these varieties.

Cooperative Extension Service ~:5' Iowa State University

Ames. Iowa 50011

Pm-660-5-84 I December 1984

TABLE 1. AVERAGE PERFORMANCE OF EARLY TO MEDIUM MATURING HYBRIDS TESTED IN DISTRICT 5o WIDELY GROWN HYPRIDS (¢) ARE ENTERED IN ~OTH TESTS FOR COMPARISONS BETWEEN TABLE l AND TA~LE 2. 280000 PLANTING RATE. LSD FOR 1984 YIELD JN BUSHELS TS 13. -----------------------------------------------------------------------------------------------------------------------------------

BRAND

*PIONEER SAR NORTHRUP KING FRYE HYB R JDS FUNK

*JACQUES CORNELIUS PRIDE KRUGER NORTHRUP KING

PRAIRIE BRANO AMERICANA NC+ MCALLISTER FS

PRIDE o•s GOLD RENZE HUGHES MCCURDY

MIDDLEKDOP STAUFFER SIEBEN MIDDLEKDOP WYFFELS

FRYE HYBRIDS OTTILIE SH ISSLER SAR

:O:FUNK

AGRJPRO GOLDEN HARVEST STURDY GROW CARGILL PAYCO

LYNKS SIEBEN PIONEER CARGILL

*PIONEER

CORNELIUS STAUFFER OE KALB FS MCALLISTER

NC+ AGRIPRO PAYMASTER LEWIS LEWIS

PAY CO WILSON RENZE NORTHRUP KING GUTWEIN

WYFFELS CORNEL !US

*CROWS TERRA CHEMICALS LYNKS

EK PRE"!IUM ll'CCURDY NC+ "!CCURDY WYFFELS

EK PREMIUM *PAG

PRAIRIE 8RAND RIVERSIDE LYN KS

*FUNK FEDERAL PFISTER STAUFFFR CYCLONE

TERRA CHEMICALS MIDDLEKOOP IOWA STATE

:O:WYFFELS PAY CO

¢o•s GOLD HAWKEYE HYBPID SIEBEN SAR LEW IS

HUGHES "'IDOLEKOOP KRUGER

*DEKALB *CARGILL

f.::GOLDEN HARV!' ST DAJRYLAND FS PRIDE SH ISSLER

RENZE ;";JACQUES

EK PREMIUM OTTILIE SHISSLER

GUT WEIN *AS GROW

IOWA STATE *CARGILL

CFS

WILSON AGRIPRO FONTANELLE CROWS AGRIPRO

lillL S ON EK PQEMIUM MIDDLEKOOP FEDERAL JACQUES

DAIRYLAND CYCLONE PAG PAG

*CROWS

:C:CARGILL PAG DAIRYLAND

VARIETY

3780 SX49DO PX9405 F2059 G4342

JX1!51 SX34 5523 8107 PX9410

SX540 2900 3440 8003 454

Xl094 6880 6244 5404 5750

M333 S5340 23XS M342 W28

F2074 R02420 GRB-175 SX209 G4438

AP391 H2480 608 891 SX822

LX4210 28XS 3475 889 3541

C44SX S5260 DK556 6566 8304

4303 HP401 4790 X21B X22B

SX872 1500B 6334 PX945f 2424

W38 C55SX 444 TR3200 LX4235

EK7780 6555 36".'3 !':'596 W43

EK7740 SX397 SX570 PS34 LX4304

G4435 FT38 2800 56!"95 6625

TP3J03 M330 109 W48 SX860

6882 SX50A 35XS SX212 X53f!

6230 "'423 8109 XL'55A 924

H2535 DX1012 675 6692 GR8-176

6340 JX179 EK7779 R02460 GR8-171'

2610 RX777 Ml16 921 W7651

1600 HP470 427 488 AP510

1700 EK7796 M451 FX39 7900

OX1017 7721 SX352 SX351 666

967 SX354 DX1020

AVERAGE OF ALL ENTRIES

AVERAGE OF WIDELY GROWN ENTRIES

YIELD BU./A MOISTURE PCT. ROOT

LODGING PCT. STALK

LODGING PCT. DROPPED

EARS PCT. STAND PCT. ---------------- -------------- -------------- -------------- --------------CROSS 1982 1983 1984 1984 1983 1982 198'1 19B3 1982 1984 1983 1982 1984 1983 1982 1984 1983 19B2

sx SX SX SX SX

sx SX SX SX sx

SX

141 162

151

151

148

SX 152 SX sx 143 SX

sx sx SX SX sx

151 159

sx 162 sx SX sx 160 SX

sx sx sx sx 157 sx 157

sx SX SX SX SX

163

sx 152 sx sx SX sx 157

sx sx SX SX sx sx sx sx sx sx SX sx SX sx sx

SX sx

165

163 163

sx 158 sx sx

sx sx SX SX sx

sx SX sx

156

159

SX 151 sx

MSX 3X SX sx SX

SX SX sx sx sx

SX sx sx sx SX

sx SX sx sx sx sx SX SX SX SX

sx sx sx sx SX

sx sx SX sx sx

SX sx sx SX SX

SX sx SX sx SX

SX SX SX SX SX

SX SX sx

159

173

166 153 161 167

166 173 159 168 1II1

155 160 162

157 156 163 161

173 167

I 68 171 158

160

l 71

159

169 175

179

76 Bl 9:l

102

93 101 101 103

88 94

93 103

105 103

88 101

97 93

101 90

103 81

100 103 87

97 94

71

105 109

96

90 110

96

97

95

96 94

105 10?

100 86

95

78 82

e9 109 103 104

87 100 107 105 l 0!)

83 fl 1

110

114 101

B2 86

105 1 11

99 105

BB

78

96

94

114 96 90

117 105

72 93

74 91

114

146 140 153 140 148

149 160 150 137 150

150 149 153 158 149

157 153 160 156 157

156 166 157 151 146

158 161 142 143 153

161 160 158 l '16 144

148 160 173 l 5fl 147

1 '19 155 156 161 166

150 152 151 170 156

164 162 160 143 149

151 167 157 140 166

159 152 152 15!' 162

143 159 15B 157 162

149 141 165 163 141

159 153 160 164 161

161 16R 157 170 159

15"i 157 153 151 158

161 157 160 161 158

156 l 75 149 163 161

147 171 174 167 159

149 161 150 17'1 175

163 173 170 155 176

172 147 168 172 161

167 157 17::'1

18.5 18.5 18.5 18.6 18.7

19.0 19.3 19.3 19.4 19.5

15.4 17.9 16.9

17.6

16.6

20.4 20.0

21.2

16.3 21.3 16.3 17.o 22.3

19.6 16.3 19.7 11.2 21.1 19.8 19.9 17.9 22.8 19.9 17.7

19.9 20.0 20.0 20 .1 2 0.1

16.7 21.3 17.4 22.1 18.8 18.9

20.2 17.6 22.3 20.2 19.0 20.2 20.3 17.4 22.0 20.3 16.9

20.3 20.3 20.3 20.4 17.5 22.11 20.4 20.3 24.2

20.4 20.5 20.5 20.5 20.5

19.0 17·4 19.0

22.2

20.6 17.8 22.0 20.6 18.1 20.6 20.6 20.7 17.3 23.7

20.7 20.7 20.7 20.7 20.8

17.8 22.0 17.4

20.8 20.9 20.9 20.9 20.9

20.9 20.9 20.9 21.0 21.0

21.0 21.0

17.7

18.4 18.9

19.0

17.5

24 .2 22.8

21.1 18.0 23.7 2 1 .1 21 .1

21.2 21.2 21.2 21. 3 21.3

21.3 21.4

21.0 19.0 17.1 18.6

21.7 19.5

23.t

21.6

21.8 19.e 25.6 21 .8

21.9 21.9 22.0 22.0 22 .1

22.1 22.2 22.2 22.2 22.2

22.2 22.2 22.3 22.3 22.3

22.3 22.3 22.4 22.4 22.5

22.6 22.6 22.6 22.7 22.7

22.9 22.9 23.l 2 3.1 2 3 .1

23.2 23.2 23.2 2 3.2 ?3.2

19.3

20.1 19.6

20.5 19.8 19.7 20.1

20.1 20.8 19.6 20.7 20.1

22.7 20.3 20.0

20.5 20.6 20.1 20.4

20.9 22.4

22.5 20.s 22.1

23.3 20.1 23.3 23.4 20.4 2 3.6 23.6

23.8 23.8 24.0 24.2 24.3

24.4 24.8 24.8 25.2 25.3

25.7 26.0 26.4

24.0

23.4 23. 7 211.4

23.8 23.4

25.5 25.3

25.4 26.0 25.3

24.5

24.6

24.7 22.7 24.7 25.4

25.3 25.0 24.7 24.6 24.9

23.9 22.9 24.0

24.8 24.2 24.6 24.5

24.5 25.0

25.8 24.4 24.0

25.3

25.9

25.9

27.0 26.B

26.0

l 0 0 0 0

0 0 0 0 0

0 0 0 0 0

0 0 0 2 0

0 l 0 0 0

0 0 0 0 0

1 0 0 l 0

0 0 0 3 0

0 0 0 0 4

0 0 0 1 0

1 0 l 0 0

0 0 0 0 1

0 0 0 4 0

0 0 0 0 0

0 0 l 0 0

0 0 0 1 I

0 0 0 0 2

0 1 0 0 0

0 0 0 0 0

0 0 0 0 0

0 0 0 0 0

0 0 0 0 0

0 0 0 0 0

0 0 1 1 0

1 0 0

0 1 0

0

l l 1 0

0 0

0 0

0 0 0 0

2 2

0 1

0 1

1 0 0

0 1

0

0 0 0

0 2

0

2

0

1 1 0 3

1 0

0 0

I 0 0 1

0 0 0 1 0

0 0 0

0 0 1 0

1 2

7 0 0

0

1

" 0

2 3

2 1

2 0 1

0 0

0

0

0

0

0

0 0

0

0

0 0

1

0

0

0

0 0

0

0

0

0

0

0 0 0 0

0 0 0 0 0

0 0 0

0 0 0 0

0 0

6 0 0

0

0

0

l 0

7 10 1 0

9 8

5 9

12 6 5

9 13

7 8 3

8 5

10 8 5

10 8 5 6 6

3 7 5 6

27

2 6 7 5 7

7 7 3

" 5

7 5 5

10 12

8 15

7 9 8

9 6 5 5 9

4 9 5 2 6

8 10

4 13

5

4 15 10

7 5

9 14

6 7

" 8 5 6

" 7

13 12

4 4 9

6 3

17 17 14

8 9 8

to 11

12 12

2 10

8

5 11 1 8 21

9

12 5 8 e 6

6 6 6

15 10

11 8

21 14 13

12 17

6

13 9 8

12

6 7

12 7

9 11

6 7

6 6 6 9

4 8

9 9

7 23

11 6

12

7 6

7

6 6 9

6 11

8

7

4

8 10

5 21

6 8

13

5 8

7 7 B 5

5 9 7 7 5

3 32 23

7 3 9 8

8 15

19 2

29

4

5

8

7 11 10

6 8

B 15

9 13

9

2 2

3

0

2

4

2

2 1

2 5

3

2

3 1

2

2

3

5

?

1 6 l 4

J 2 1 l 3

4 4 2

2 1 2 3

1 4

4 1 6

2

3

5

2 5

2

0 0 0 0 0

0 0 0 0 0

0 1 0 0 0

0 0 0 0 1

0 0 1 0 0

0 0 0 0 0

0 0 0 0 0

0 0 0 0 l

1 0 0 0 0

0 0 0 0 0

J 0 0 0 0

0 2 0 0 l

0 0 0 0 0

0 0 0 0 0

0 0 0 0 0

0 0 0 0 0

0 0 0 0 0

0 0 0 0 0

0 0 0 0 0

0 0 0 0 0

0 0 0 0 0

0 0 0 0 0

1 0 0 0 0

0 0 0 0 0

0 1 0

0 0 I

0 1 0 1

0 0

0 1 1 l

0 J

2 0 l

0 l

0 1 0

0

3

0 1 0 0

1 0

0 0

0 0 0 1

0 1 1 I 0

0 0 l

1 0 0 0

0 1

0 l l

0

0

2

1 1 2

2 2

2 1 I

0 0

0

0

0

0

0

0 0

0

0

0 0

0

0

0 0

0

0

0

0

0

0

0 0 0 0

0 0 0 0 0

0 I 0

0 0 0 0

0 0

0 0 I

0

0

0

0 0

0

88 93 94 90 92

86 97 94 91 92

89 88 86 92 92

92 91 91 89 91

86 93 91 83 85

90 91 79 85 91

88 85 94 89 79

89 89 88 92 82

92 95 85 90 91

90 93 90 91 94

90 89 87 89 78

92 93 90 75 92

93 90 83 95 89

74 90 88 91 85

95 90 92 93 82

93 f'3 91 93 92

91 91 95 96 89

88 85 92 ID 88

92 85 94 92 90

91 92 88 89 91

81 87 90 92 93

89 95 90 90 91

90 90 89 86 91

88 70 91 68 93

91 89 86

71 78 72

74

68 73 75 72

67 74

69 72

75 74 59 75

74 70

70 75

72 70

75 69 71

70 76

68

68 76 66

72 77

63

69

75

73 71 7Fo 78

69 61

75

'511 71

71 72 73 71

63 73 71 74 63

57 64 76

7'5 72 69 68

74 74

65 75 08

63

70

64

74 67 68

6CI 66

70 65

71 70 74

92 92

90

94

83

90

80

92 92

89

88

90 BB

87

83

92

90

93 e7

89

BB 92

81

91

91

85 84 Bfl 93

97 91 92 90 68

89 92 64

87 B7 91 88

119 88

93 92 89

89

68

81

91 91

9 1

160.3 96.0 156.9 21.6 19.7 23.8 0.3 o.7 0.2 8.3 9.o 2.3 0.2 o.7 0.1 89.2 70.5 88.5

161.7 91.9 158.5 22.1 20.3 24.4 0.2 0.9 o.6 11.e 14.2 3.1 0.2 o.8 0.2 B9.6 70.1 89.7

SX = SINGLE CROSS. MSX= MODIFIED SINGLE CROSS. 3X = 3-WAY CROSS. 4X = 4-WAY CROSS. *WIDELY GROWN HYBRID ENTFRED BY IOWA STATE UNIVERSITY AND ENTERED JN BOTH THE EARLY TO MEDIUM MATURITY TEST •ND THE MEOIUM TO LATE MATURITY TEST FOR COMPARISONS BETWEEN TESTS.

TABLE 2. AVERAGE PERFORll'ANCE OF MEDIUM TO LATE MATURING HYBRIDS TESTED IN DISTRICT 5. WIDELY GROWN HYBRIDS f*) ARE ENTERED IN BOTH TESTS FOR COMPARISONS BETWEEN TABLE 1 AND TABLE 2. 280000 PLANTING RATE. LSD FOR 1984 YIELD IN BUSHELS TS 11.

YIELD BU./A MOISTURE PCT. ROOT

LODGING PCT. STALK

LODGING PCT. OROPPEO

EARS PCT. STANO PCT.

BRAND VAPIETY CROSS 1982 1983 1984 1984 1983 1982 1984 1983 1982 1984 1983 1982 1984 1983 1982 1984 1983 1982

*PIONEER ::::.JACQUES

AMERICANA *FUNK

FRYE HYBRIDS

OUALITY PLUS *PIONEER *PAG *FUNJ< *WYFFELS

:O:CRDWS PIONEER STAUFFER

*AS GROW STURDY GROW

:O:DEKALB :;o • S GOLD

DEKALB QUALITY PLUS

;";CARGILL

KRUGER PAYMASTER

:;cARG ILL PIONEER MCALLISTER

CORNELIUS FRYE HYBRIDS NC+ AMERICANA CARGILL

*GOLDEN HAPVEST MCCUPDY NORTHRUP KING SIEBEN CFS

RENZE CORNELIUS FRYE HYBRIDS SAP LEWIS

LYN KS MCALLISTER DEKALB WILSON HAWKEYE HYOP ID

FRYE HY!3RI D5 FONTANELLE SIEBEN

*JACQUES FEDE"PAL

KALTENBERG o•s GOLD CROWS HAWKEYE HYBRID FUNK

MCALLISTER HUGHES STAUFFER EK PREMIUM GUT WEIN

OTTILIE NC+ RIVERSIDE PIONEER lolYFFELS

GOLDEN HARVEST LEWIS FS STAUFFER l(ALTE"IBFRG

CARGILL PAY CO PAYMASTER AMERICANA LYN KS

KRUGFR DEKALB PRIDE PAY CO SUPERCROST

HENKEL FUNK TERRA CHEMICALS PFISTER c•s GOLD

EMEHW FS CFS NC+ LEWIS

AMERICANA PRIDf PFISTER SH ISSLER CROWS

STINE JACQUES WYFFELS 0 •s GOLD MCCUQOY

SIEBEN OTT !LIE EK PREMIUM S BRAND SHISSLER

MCALLISTER SUPEFICROST AM ES BEST CROWS CFS

3780 JX 151 3010 G4438 F2125

1082 3541 SX397 G4435 W48

444 3378 S6210 RX777 623

XL55A 6882 DK5B7 1132 921

8110 6990 924 3297 7909

C62SX F2153 4710 3100 937

H2535 7384 PX9527 43XS W4000

6412 C72SX F2130 SX!'>500 5650

LX4315 8009 TllOO 18009 SX56

F210 5230 45XS JX 179 FX40A

1()(74 2570 666 SX60 G4514

e310 SLX39A S7751 EKB805 2660

'102485 5990 RS23A 3377 W6 l

H2572 591D 6933 S7759 KX77

967 SX925 7190 C486 LX4355

8115 DK656 7759 SX900 5436

H24 Glf522 TR:3400 3500 2545

X5161 685 EW97013 6190 X6?8e

3300 x 1164 3400 GRB-106 688

1317 6100 W65 5291 7787

61lXS R02660 EK9900 SS64B GR8-I94

7300B 7600 VIKE300 690 8214

AVERAGE OF ALL ENTRIES

AVERAGE OF WIDELY GROWN ENTRIES

SX SX sx SX sx

SX

150

157

SX 154 sx MSX 159 sx 161

SX 158 sx sx SX 168 sx

sx SX sx SX SX

1115 166

168

sx 159 SX SX 162 sx SX

sx 156 sx sx l 63 sx 170 sx

sx SX SX SX SX

157 163 157

178

SX 168 SX SX SX sx

sx sx sx SX sx

sx SX sx sx sx

sx SX sx SX sx

sx sx sx sx sx sx SX SX sx SX

sx SX sx

163

164 177

178 167 173

169 171 177 169

164 175 169

sx 176 SX 189

sx SX SX SX sx

sx SX sx sx sx

SX

160

177

161 169

MSX 160 sx SX sx

SX SX sx SX sx

SX sx sx sx SX

sx SX SX SX SX

155

l 81 l 71

169 176

sx 167 sx sx SXB SX

sx SX sx sx sx

l 72 167 179

96 80 99

104

93

83 83

76

119 76

101 110

111

81

88

89

99 86

76 94 83

91

90 94

83 93 94 97

95 91! 97

I 05 85 93 91 80

84 91

92 1 O~·

q3

Be 103

74 78 93

89

92

99 Bl' 97

87

94

89 Ql

87

91 63 94

69

Bit

93 87 98

138 140 145 152 14!!

14 3 149 151 144 161

159 155 148 167 147

14B 156 147 151 154

157 158 156 l 56 146

157 166 149 160 167

161 167 149 151 169

16? 171 144 171 167

146 157 150 171 163

151 154 164 168 154

158 160 161 170 16 3

167 167 160 160 15?

166 163 165 171 159

162 158 167 162 166

167 165 156 156 164

163 166 14 7 164 155

165 173 159 164 159

166 159 155 16A 160

154 154 166 147 159

155 173 164 163 157

159 165 161 162 163

167 169 167 162 156

19.6 21.6 21.8 21.9 22.0

?2.0

15 .1 l7o2 17.9 20.1

19.9

211 .2

22.1 17.1 23.3 22.2 23.3 20.1 24.5 2 3 • 3 1 9 • 3 24 • 7

23.4 16.1 23.7 23.4 2 3.lf 23.5 22.3 25.6 23.6 22.6

23.7 21.1 24.0 23.7 20.2 25.3 23.7 23.f! 24.0 21.0 24.l

24.l 19.7 25.3 24.I 24.1 20.9 24.0 24.1 24.2

24.2 20.7 25.0 21i.2 24.4 19.9 24.8 24.6 20.5 24.l 24.7

24.8 24.8 24.8 24.8 24.9

20.A 24.7 19.A

22.7

24.8 26.5 25.0

26.6

24.9 23.7 26.8 24.9 23.3 24.9 24.9 24.9

25.0 25.0 25.0 25.0 25.0

25.0 25.0 25.l 25.1 25.l

;> 5. 1 2'!'i.2 25.3 25.3 25.3

20.3 22.5 19.8 24.3

24.6 23.4 22.9

23.4 22. 7 25.3 24.0 22.7

25.3 23.6 25.3 24.3 25.3 2'5.3 25.3

25.3 25.3 25.4 25.4 25.5

25.5 25.5 25.5

24.7 ?l.O 24.4

25.3

24.8 27.0

26.9 25.0 25.6

26.2 26.7 27.2 26.3

26.7 24 ... 26.6

25.6 24.B 27.l 25.7 23.6 211.2

25.7 2'5. 7. 25.7 25.7 25.8

25.8 25.B 25.9 25.9 25 .9

25.9 26.0 26.0 26 .1 26.I

26.l 26.2 26.2 26.3 26.4

26.4 26.4 26.6 ?6.6 26 .8

26.8 26.9 27.1 27.2 27.2

27.3 27.4 27.5 27.5 27.6

27.7 27.6 28.0 28.3 28.9

25.4 23.2 22.5

24.6

24.0

24.9 24. l 24.5

23.7

24.8

25 .0 25.3

25.3

25.4 25.l 25.7

25.7

25.9

25.lf 25.8 25.8

26.8

27.o

27.2 27.2

27.0

27.2

26.9 27.5

29 .6 29 .9

29 .3

29 .1 29.4 29.3

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89 91 89 90 93

92 82 69 95 95

94 90 83 89 94

82 93 83 87 94

92 89 94 88 86

92 93 91 93 96

91 93 89 73 95

89 93 94 93 95

87 93 87 95 93

90 78 93 95 91

86 92 93 94 94

95 93 92 89 79

93 91 94 92 90

87 91 93 92 96

91 91 93 91 92

91 93 90 90 92

86 93 93 92 87

92 95 93 90 88

92 94 91 95 96

92 92 87 93 90

93 90 91 91 90

94 93 95 85 87

75 611 72 73

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69 66

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71 65

72 72

76

67

66

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69 69

63 68 66

64

66 69

63 70 71 71

68 66 66

65 68 65 63 71

68 62

67 72 69

65 74

71 47 70

66

69

69 61 70

61\

6B

66 65

69

66 78 66

65

67

67 6'! 72

92

88

69

91 88

89

93

87 92

91

91

84

88

90 89

87 88 89

93

88

87

88 88

90 Ill! 91

ll9 94 61' 91

86 93 67

87 91

119

90

91 B9

90

92

87 91

90 B7

92

89 87 92

166.6 91.3 t5B.8 25.2 22.7 26 .1 o.3 o.7 o.4 0.3 11.0 3.3 0.2 1.0 0.2 90.9 67.7 e9.4

159.4 94.I 153.5 23.1 t9.ll 24.1 0.1 o.a o.6 9.2 14.2 2.e 0.2 o.4 0.2 90.9 69.7 89.l

SX = SINGLF CROSS. MSX = MODIFIED SINGLE CROSS. 3X = 3-WAY CROSS. 4X = 4•WAY CROSS. *WIDELY GROWN HYBRID ENTERED BY IOWA STATE UNIVERSITY AND ENTERED IN BOTH THE EA'ILY TO MFDIUM MATURITY TEST AND THE MEDIUM TO LATE "'ATURJTY TEST FOR COMPARISONS BETWEEN TESTS.

TABLE 3. AVEPAGES OF 1983-84 ANO 1982-84 OF VARIETIFS TESTED IN DISTPICT 5 • LSD FOR YIELDS AR~ 4 BUSHELS FOR 82-84 ANO 5 BUSHFLS FOR 83-84. --------------------------------------------------------------------------------------------------------------------

BRANO VARIETY YIELD BU./A MOISTURF PCT.

ROOT LODGING PCT.

SHLK LODGING PCT.

DROPPED FARS PCT. ---------------- ---------------- -------------- -------------- --------------CROSS 82-84 83-84 83-84 82-84 82-84 83-84 82-84 83-84 e2-84 83-84 --------------------------------------------------------------------------------------------------------------------

*PIONEER NORTHRUP KING CORNELIUS PRIDE PRAIRIE BRANO

FUNK KRUGER SAR o•s GOLD AMERICANA

*JACQUES WYFFELS RENZE FS M IDDLEKOOP

MCALLIST!:R MIDDLEKOOP SAR STURDY GROW STAUFFER

NC+ LYNKS D~KALB CORNELIUS NORTHRUP K PlG

:~PIONEER SIEeEN HUGHES MCCURDY STAUFFER

PAYMASTER GOLDEN HARVE<;T CARGILL AMERICANA LEWIS

MCCURDY PAY CO MCCUPDY

*C'WWS PRAIRIE BRAND

*FUNK RIVERSIDE STAUFFER IOWA STATE SIEBEN

PFISTER EK PREMIUM

:~WYFFELS *FUNK

PAY CO

LEWIS MIDDLEKOOP FS SAR HAWKEYE HYFlR ID

:::o•s GOLD PRIDE DAIRYLAND WILSON

:::DEKALB

*CAPGILL PENZO:: KRUGER FONTANELLE IOWA STATE NC+

t.:GOLDEN HARVEST NORTHRUP KING DEKALB CORNELIUS

KRUGER AMERICANA

'.'CARGILL LYN KS

:~AS GROW

STURDY GROW PIONEEP

t.:JACQUES MIDDLEKOOP MCALLISTER

CFS WILSON FEDERAL o•s GOLD FEDERAL

FUNK CORNELIUS PAYMASTER CYCLONE DAIRYLAND

KALTENFlERG RENZE JACQUES "4CALLISTER PAYCO

KALTENBERG HAWKEYE HY8PID WILSON MCCURDY HUGHES

SIEBEN FUNK KRUGER WYFFELS PAY CO

RIVERSIDE LYNKS STAUFFER SUPERCROST CROWS

PAG PRIDE FS CARGILL NC+

LEWIS AMERICANA DAIRYLAND PAG WYFFELS

JACQUES o•s GOLD SIEBEN MCALLISTER EK PREMIUM

SUPERCROST AMES FlEST

3780 PX9405 SX34 5523 SX540

G4342 8107 c;x4000 6880 2900

JX 151 W28 6244 454 M142

8003 "1333 SX209 liOR S5260

3653 LX4210 DK556 C44SX PX9455

3541 28XS !0404 5750 S5340

4790 H24RO 801 3010 X21B

5"<96 SX872 l'\')!;5 444 SX570

G4438 RS34 S559'i 109 3'iXS

2'100 EK77~0 W48 G443'5 SX81\0

X539 "1330 675 c;x212 SX'50A

6882 6602 DX1012 1600 XL55A

924 6340 p 11 f) 427 "116

4710 H2535 PX95?7 T 1100 C6:'SX

8109 3100 921 LX411" RX777

623 3377 JX 179 M451 8009

W4000 1700 FX39 2570 FX40A

G4514 C•2SX 7100 7721 DX1017

KX74 6412 7900 8110 SX925

KX77 SX'50 113ooe 7384 SLX39A

45XS G4522 8115 W61 SX900

PS23A LX4355 S7759 5439 666

SX351 7759 '595 967 6100

X629F.! 3300 DX1020 SX354 W65

8100 5291 68XS 73008 EK9900

"600 VIKE300

SX SX sx SX SX

SX sx SX sx SX

sx SX SX SX sx sx SX sx 5X SX

SX SX sx SX sx SX sx sx SX SX

SX sx SX sx 5X

SX SX sx sx SX

SX sx sx SX c;x

SX sx 5X MSX SX

5X SX SX 51( SX

SX sx sx SX sx SX sx sx sx sx sx sx 5X SX SX

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sx SX SX SX sx SX SX sx sx sx SX SX sx 5X SX

SX SX SX sx 5X

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SX sx sx SX sx sx sx SX sx sx SX SX SX sx SX

sx SX 5X SX SX

SX SX

125

137

134 129 12e 136 132

14 1

137

131 138 135

132 140

129

135 14 1

147

139

134 13 4

134 131 130 141 141

139 1~2 144

13!: 135 135 14 R 147

141 136 13e 129 131 130 145 132

150 137 13e 129 136 134

1JO 138 14 1 131 14Q

151 148

146 143 1315 138 141

137

140

1E3 146 148 141

146 140

140 14 0

140 143 142

142

138 136 136 137 146

141

1 31!

144 138 144

141 14e

114 123 130 126 119

125 120 11 0 129 122

115 118 132 126 126

126 126 123 131 132

128 122 1215 127 120

115 127 122 129 120

121 1 30 1115 122 140

128 130 123 122 129

122 1 2 I 122 135 132

121 127 128 llR 132

132 121 121 137 134

120 123 129 11 3 120

129 131 119 123 139

124 12e 116 122 123

118 123 130 115 139

1 11 139 138 142 12 c;

130 129 125 123 125

121 1 32 124 126 144

1 32 126 133 125 121

134 131) 134 130 129

129 130 127 126 126

128 126 125 126 127

122 123 127 120 129

125 1 21 143 124 123

1 32 128 124 130 122

128 133

1 7. 1 17.7 17.8 17.8 17.9

10.1 18.2 10.2 18.3 11'1 .4

18.6 18 .6 18.7 18.8 18.8

18.9 18.9 18.9 18.9 19.0

19.l 19.2 19.2 19.2 19.3

19.3 19.3 19.4 19."' 19.6

l<l.6 10.0 19.8 19.8 19.9

19.9 19.9 20 .1 20.1 20.6

20.7 20.R 20. 9 21. 0 21.0

?1.0 21 .1 21. 1 21.1 2 1 • 1

21." 21.3 21. 3 21 .5 21 .5

2 1. 'i 21.5 21. 6 2 1 .... 21.9

21 .9 21.9 21.9 21 .9 22.0

22. 1 22.2 22.3 22.4 22.4

?2.'i 22.5 22.6 ?2.6 22.9

23.1 21.2 23.4 23-7 23.8

23 .I'! 23.0 23.Q 23.0 24.0

24. f) 24 .1 24. I 24.1 24 .1

24.2 24.3 24.3 24.4 24.4

24.6 24.6 24.6 24.7 24.8

24.8 24.8 24.9 24.9 25.0

25.0 25.2 25.2 25.2 25.3

25.3 25.4 25. !'i 25.5 25.6

25.8 25.8 25.8 26 .o 26.1

26 .1 26.4 26.5 26 .'i 26.7

26.8 ?.6.9

18 .1

19.0

19 .2 19.6 19 .1 19 .3 19 .3

19 .a 19 .9

20.2 20.0 20 .1

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20.7

21 .2 20.6

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21 .8 ?2.4 22 .1 21 .6 22.3

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Table A. Field Data

Gardner Fann Lang Farm Elijah Farm Clarion loam Mahaska silty clay loam Tama silty clay loam

Fertilizer applied. lb . N P20 1 K,0 N

Plowdown. ......... 135 90 120 23 Preplant. .. . .. ·· ······ - - -- -Sidedress ... ....... .... - - - 200 TOTA L 135 90 120 223

1983 crop .. ... . .... . ... . Soybeans Row width ... . .. . . . .. .. . . 38 inches Plant ing date ... . . . .... . .. May II Harvest date ......... . . .. Oct. 11 - 12

1984 Field Data The District 5 test was conducted on farms operated by Don

Gardner near Ogden in Boone County, Eugene Lang Farm Corp. near Grinnell in Poweshiek County, and Dick Elijah near Clarence in Cedar County. The field data are presented in table A. The early experiment at the Boone County location was not usable because of an excess of plot to plot variability.

Subsoil moisture for the district was favorable to wet at planting time. Rainfall was near normal in May and June and well below normal in August and September. July rainfall varied from location to location with the Boone County location receiving above normal rainfall, the Poweshiek County location receiving well above nor-mal rainfall , and the Cedar County location receiving normal rain-fall . Temperatures were well below normal in May, July, and September, above normal in June , and well above normal in August. The average district yield was 12 bushels per acre more than the mean of the five preceding years' averages.

Other Reports Separate reports for variety performance are available for each

district shown in figure l. These publications are available at your county extension office or from Publications Distribution , Printing and Publications Building , Iowa State University, Ames , Iowa 500ll.

The 1984 Iowa Com Yield Test Report: Pm-660-1-84 District I Pm-660-5-84 District 5 Pm-660-2-84 District 2 Pm-660-6-84 District 6 Pm-660-3-84 District 3 Pm-660-7-84 District 7 Pm-660-4-84 District 4

File. Agronomy 1

Cooperative Extension Service, Iowa State University of Science and Technology and the United States Department of Agriculture cooperating. Robert L. Crom, director, Ames, Iowa. Distributed in furtherance of the Acts of Congress of May 8 and June 30, 1914. * and justice for all The Iowa Cooperative Extension Service's programs and policies are consistent with pertinent federal and state laws and regulations on non-discrimination regarding race, color, national origin, religion, sex, age, and handicap.

P,O, K,O N P20 5 K20

60 80 30 - - 160 - - -60 80 190

Soybeans 30 inches May 9 Oct. 4-5

District 5 Designations Identifying Brands in the Yield Test

80 --80

Soybeans 30 inches May 6 & 7 Oct. 22-23

AgriPro ...... . . .. .. . ... .. . AgriPro , Mission , KS 66201 Americana . . ....... Americana Seeds , Bowen, IL 62316 Ames Best. ..... . . . . . .. . .. . Ames Best Hybrids , Ames, IA 50010

*Asgrow ............ . . . ... . . Asgrow Seed Company, Kalamazoo, Ml 49001

*Cargill... . . . . . . . . Cargill, Inc., Minneapolis , MN 55440 CFS .. ........ .... . .. . .. .. Custom Farm Seed, Momence, IL 60954

120 --120

Cornelius . . . . .. . Cornelius Seed Com Co., Bellevue, IA 5203 I *Crows.. . . ...... Crow 's Hybrid Com Company, Milford , IL

60953 Cyclone. . . .... . . ... . Elm Grove Farms , Inc ., Winfield. IA 52659 Dairyland .... . . .... Dairyland Seed Co., West Bend, WI 53095

*DeKalb.. ... . . . DeKalb AgResearch Inc. , DeKalb, IL 60115 EK Premium . . ....... . .... EK Premium, Berwick , IL 61417 Embro . . . . . . . . . . . Embro Seeds, Lake Crystal, MN 56055 Federal. . . . . . . . . . . . . . . . . . . Federal Hybrids , Marion , IA 52302 Fontanelle. . . . . . . . . . . . . . . . . Fontanelle Hybrids, Nickerson , NE 68044 FS. .... . . . . . . . . Growmark , Inc ., Bloomington, IL 61701 Frye Hybrids ..... . . ... ... . Frye Hybrids , Inc., Bassett. NE 68714

*Rink. . . . ... .... ... Rink Seeds International, Inc ., Bloomington, IL 61701

*Golden Harvest. .. .... The J. C. Robinson Seed Company. Waterloo, NE 68069

Gutwein . ... Fred Gutwein & Sons , Inc., Francesville. IN 47946 Hawkeye Hybrid . . . Hawkeye Hybrids . Pella, IA 50219 Henkel . . Henkel Seeds , Mendota. IL 61342 Hughes . . . . ............... Hughes Hybrids , Woodstock , IL 60098 Iowa State . ..... . ...... . . . . Ralph Mathis, Elkhart, IA 50073

• Jacques... . . . . . . . . . Jacques Seed Company, Prescott, WI 54021 Kaltenberg .. . . .. .. ......... Kaltenberg Seed Farms , Waunakee, WI 53597 Kruger. . . . Kruger Seed Company, Cedar Falls, IA 50613 Lewis. . .. . ........ Frank W. Lewis & Son Seed Farms , Inc., Ursa,

IL 62376 Lynks ..................... Lynks Hybrids , Marshalltown , IA 50158 McAllister. . . . . McAllister Seed Farms, Mt . Pleasant, IA 5264 I McCurdy . . .. . .. . . .. ....... McCurdy Seed Co., Fremont , IA 52561 Middlekoop . .. ... . . .. . .... . Middlekoop Seed Com Co., Packwood , IA

52580 NC +. . . ...... . . ... NC+ Hybrids, Lincoln, NE 68504 Northrup King. . . . Northrup King Co., Minneapolis, MN 55440

*O's Gold . . . . . . . O's Gold Seed Co., Parkersburg, IA 50665 Ottilie .. Ottilie seed Farms , Marshalltown, IA 50158

*PAG ........ .. ............ PAO Seeds , Minneapolis, MN 55440 Payco .......... ....... .. .. Payco Seeds , Inc ., Dassel , MN 55325 Paymaster. ... . . . . . .. ... Paymaster Seeds , Belmond, IA 5042 I Pfister. . . . . . . . . . . . . . . . . . Pfister Hybrid Com Co., El Paso, IL 61738

*Pioneer ..... . .. .. .. . ....... Pioneer Hi-Bred International , Inc ., Des Moines , IA 50308

Prairie Brand .. . . .. ...... . . Gordon Martinson Seed Farm, Harcourt , IA 50544 Pride ...... .. .. . . . ... .. .... Pride Company, Inc., Glen Haven, WI 53810 Quality Plus .. .. . Quality Plus Seeds, Cedar Falls . IA 50613 Renze .. . . . .. ... . .... Renze Hybrids, Inc ., Carroll, IA 51401 Riverside .. . .. . .. ... .. . . . .. Lynnville Seed Company, Lynnville , IA 50153 S Brand . . .. ... ... . . .. .. . Schechinger Seed Co., Harlan, IA 5 I 537 Sar .................... .. . Sar Hybrids , Inc ., Charles City, IA 50616 Shissler . . ... . . . ..• . ....... Shissler Seed Co., Elmwood , IL 61529 Sieben .. ..... .... . ...... . . Sieben Hybrids , Inc., Geneseo, IL 61254 Stauffer. . . . . . . . . . . . Stauffer Seeds , Springfield, IL 62704 Stine . . . . . . Stine Seed Farm, Inc., Adel. IA 50003 Sturdy Grow . . . . . . Sturdy Grow Hybrids . Inc., Arcola, IL 619!0 Super Crost. . . . . . . . . . . Edward J. Rink & Sons , Inc ., Kentland, JN

Terra Chemicals ..... . ... . Wilson . ..

*Wyffels. . . .... . . .. ... . .

47951 . Terra Chemicals, Sioux City, IA 5 I !02 Wilson Hybrids , Inc ., Harlan , IA 51537 Wyffels Hybrids, Inc ., Atkinson , IL 61254

*Companies with one or more widely grown entries made by Iowa State University.