Location 5 -- Mississippi State University, Starkville

Soil type Leeper silty clay
Soil pH 8.1
Soil fertility P - H, K - H
Fertilizer added None
Herbicide application Preemergence - Dual @ 2 lb/a + Lorox @ 1lb/a
Postemergence - Classic @ 0.5 oz/a 2 times
Roundup Ready - Roundup Ultra @ 3 pt/a on June 16, 2 pt/a on July 29, and 1.5 pt/a on August 19
Planting date Group IV 4/10/97
Group V-VI 5/12/97
Roundup Ready IV-V 5/12/97
Harvest date Group IV Early 8/27/97
Group IV Late 9/12/97
Group V Early & Late 9/29/97
Group VI 10/15/97
Roundup Ready IV 9/16/97
Round Ready V Early 9/29/97
Roundup Ready V Late 10/3/97

Location Summary

The weather was extremely wet and cool during the period before and after planting. The test was planted, and a good stand was obtained, but the growth was stunted for 6 weeks after planting because of saturated soils. When the weather warmed up and the soil dried, the plants grew very rapidly, as did the weeds. The weeds were controlled and yields were higher than were expected, despite the extreme stress conditions the plants were under.

Roundup Ready Test -

Delays in the first application were due to soil conditions which were too wet to support application equipment. Pitted morningglory were up to 30 inches long by the time the first application was made. Incomplete control occurred after the first application, requiring additional treatments.

Roundup applications exceeded the maximum use rate because of this heavy, early-season morningglory infestation and delayed initial applications. Since the objective of the study was to compare yields under relatively weed-free conditions, an additional Roundup Ultra application was made.


Rainfall Summary


April 5.10 inches
May 7.70 inches
June 5.00 inches
July 3.30 inches
August 3.50 inches
September 3.40 inches
Total 28.00 inches

Rainfall graph - Location 5


Table 52. Maturity Group IV Early Soybeans Planted April 10, 1997, at Mississippi State University in Starkville1
Variety2 Brand Yield3 Maturity date Plant height Lodging score
1995 1996 1997
  bu/a bu/a bu/a   in  
Released Varieties
DP 3478
Deltapine
 --
 --
 31.6
8/24
21
1
TV4664
Terral
 --
 --
 31.5
8/15
25
1
A4715
Asgrow
 --
 --
 30.3
8/21
25
1
AP 4880
AgriPro
 --
 --
 28.9
8/22
22
1
STRESSLAND
Public
 --
 --
 28.6
8/12
26
1
HY 4540
HyPerformer
 --
 --
 26.9
8/18
22
1
TN4-86
Public
 --
 --
26.1
8/24
26
1
TV 4479
Terral
 --
 --
 25.3
8/18
26
1
HBK4755
Hornbeck
 --
 --
 25.3
8/14
25
1
A4341
Asgrow
 --
 --
 22.8
8/12
23
1
S46-44
NK
 --
 --
20.2
8/14
23
1
Overall mean
 --
 --
 27.0
 
LSD (.10)
 --
 --
  4.6
 
Error degrees of freedom
 --
 --
 20
 
CV (%)
 --
 -- 
 12.1
 
R2(%)
 --
 --
 78
 
1Leeper Silty Clay.
2All are released varieties.
3No 1995 and 1996 statistics


Table 53. Maturity Group IV Late Soybeans Planted April 10, 1997, at Mississippi State University in Starkville1
Variety Brand Yield2 Maturity date Plant height Lodging score
1995 1996 1997
  bu/a bu/a bu/a   in  
Released Varieties
499
Riverside
 --
 --
 39.7
9/5
32
2
Manokin
Public
 --
 --
 34.0
9/1
19
1
9511
Pioneer
 --
 --
 33.3
9/1
23
1
HBK 49
Hornbeck
 --
 --
 32.7
9/3
28
2
3495
Dyna-Gro
 --
 --
 31.8
9/3
25
2
Wicomico
Public
 --
 --
 31.7
9/3
22
1
S51-00
NK
 --
 --
 31.03
8/29
20
1
HBK 5149
Hornbeck
 --
 --
 28.2
9/1
22
1
A4922
Asgrow
 --
 --
 24.53
8/21
22
1
DK4860
Delta King
 --
 --
 24.03
8/21
23
1
Dixie 478
Dixie
 --
 --
 22.73
8/18
21
1
KS 4895
Public
 --
 --
 21.43
8/28
22
1
TN4-94
Public
 --
 --
 18.53
9/1
20
1
TV 4770
Terral
 --
 --
 18.43
8.21
20
1
 TN4-86
Public
 --
 --
 17.2
8/26
21
1
S48-14
NK
 --
 --
 16.43
8/21
19
1
9482
Pioneer
 --
 --
16.33
8/18
18
1
Delta Grow 4710
Delta Grow
 --
 --
 14.1
8/24
21
1
CX 499c
DEKALB
 --
 --
 13.03
8/12
23
1
Experimental Lines
RVS 490
Riverside
 --
 --
 36.3
9/1
26
2
TVX4975
Terral
 --
 --
 34.1
9/3
23
1
DPS 9749
Deltapine
 --
 --
 26.6
9/1
22
1
DGC751
DEKALB
 --
 --
 16.93
8/15
20
1
DK LDKX49994
Delta King
 --
 --
 16.03
8/24
20
1
DGC750
DEKALB
 --
 --
 14.83
8/14
21
1
HBK X9748
Hornbeck
 --
 --
 11.93
8/18
20
1
Overall mean
 --
 --
 24.0
 
LSD (.10)
 --
 --
  5.1
 
Error degrees of freedom
 --
 --
 50
 
CV (%)
 --
 -- 
 15.6
 
R2(%)
 --
 --
 88
 
1Leeper Silty Clay.
2No 1995 and 1996 statistics.
3Shattered.


Table 54. Maturity Group V Early Soybeans Planted May 12, 1997, at Mississippi State University in Starkville1
Variety Brand Yield2 Maturity date Plant height Lodging score
1995 1996 1997
  bu/a bu/a bu/a   in  
Released Varieties
H5050
Hartz
 --
 --
55.4
9/21
23
2
499
Riverside
 --
 --
52.1
9/15
39
2
H5454
Hartz
 --
 --
51.7
9/21
23
2
TV5495
Terral
 --
 --
 51.4
9/21
24
2
HY 574
HyPerformer
 --
 --
 50.7
9/23
22
2
DK 5475
Delta King
 --
 --
 50.7
9/21
19
1
R Robin-5
Riverside
 --
 --
49.8
9/26
18
2
Rhodes
Public
 --
 --
 48.9
9/21
21
2
TV 5770
Terral
 --
 --
 48.8
9/22
21
2
TV 5797
Terral
 --
 --
 48.6
9/23
26
2
S57-11
NK
 --
 --
48.2
9/20
21
2
A5547
Asgrow
 --
 --
 47.7
9/21
19
1
Delsoy 5500
Public
 --
 --
47.0
9/15
22
2
DP 3519s
Deltapine
 --
 --
 46.9
9/15
21
1
RVS 77
Riverside
 --
 --
 45.2
9/23
21
2
Hutcheson
Public
 --
 --
 44.4
9/21
21
1
H5088RR
Hartz
 --
 --
 44.3
9/21
24
2
RVS 549
Riverside
 --
 --
 43.8
9/21
21
1
RVS 529I
Riverside
 --
 --
 41.1
9/17
35
2
Pace
Public
 --
 --
40.9
9/17
23
2
H5218
Hartz
 --
 --
 38.8
9/17
18
1
CX 510C
DEKALB
 --
 --
 38.5
9/15
17
1
TN5-95
Public
 --
 --
 37.7
9/15
20
1
Experimental Lines
DPS 9752
Deltapine
 --
 --
 51.2
9/15
22
2
R93-171
Public
 --
 --
 47.2
9/21
20
1
DK LDKX51496
Delta King
 --
 --
 44.8
9/21
23
2
DGC753
DEKALB
 --
 --
 39.3
9/21
18
1
Delta Grow 5330
Delta Grow
 --
 --
 38.0
9/12
18
1
DK LDKX57722
Delta King
 --
 --
 36.6
9/12
16
1
J94-5
Public
 --
 --
 25.2
9/12
16
1
Overall mean
 --
 --
 45.3
 
LSD (.10)
 --
 --
  6.7
 
Error degrees of freedom
 --
 --
 60
 
CV (%)
 --
 -- 
 10.9
 
R2(%)
 --
 --
 71
 
1Leeper Silty Clay.
2No 1995 and 1996 statistics.


Table 55. Maturity Group V Late Soybeans Planted May 12, 1997, at Mississippi State University in Starkville1
Variety Brand Yield2 Maturity date Plant height3 Lodging score3
1995 1996 1997
  bu/a bu/a bu/a   in  
Released Varieties
S59-60
NK
 --
 --
 61.6
9/23
--
--
HLA572
Hartz
 --
 --
 60.6
9/26
--
--
CX570C
DEKALB
 --
 --
 59.6
9/20
--
--
DP3588
Deltapine
 --
 --
 59.1
9/23
--
--
TV 5893
Terral
 --
 --
 58.7
9/22
--
--
9594
Pioneer
 --
 --
 54.4
9/23
--
--
A5843
Asgrow
 --
 --
 54.1
9/21
--
--
DK5995
Delta King
 --
 --
 52.7
9/26
--
--
DK 5850
Delta King
 --
 --
 52.4
9/22
--
--
55
Buckshot
 --
 --
 52.0
9/21
--
--
Hutcheson
Public
 --
 --
51.8
9/21
--
--
A5959
Asgrow
 --
 --
 50.8
9/23
--
--
A5944
Asgrow
 --
 --
 50.7
9/23
--
--
A5848
Asgrow
 --
 --
 49.1
9/23
--
--
UARK-5896
Public
 --
 --
 49.1
9/27
--
--
ACCOMAC
Public
 --
 --
 48.6
9/17
--
--
9592
Pioneer
 --
 --
 48.0
9/23
--
--
TV5926
Terral
 --
 --
 45.4
9/26
--
--
3576
Dyna-Gro
 --
 --
 44.8
9/17
--
--
Experimental Lines
S92-1679
Public
 --
 --
 56.1
9/23
--
--
HBK X9659A
Hornbeck
 --
 --
 55.3
9/22
--
--
DGC758
DEKALB
 --
 --
 55.1
9/23
--
--
HBK X9657A
Hornbeck
 --
 --
 54.8
9/21
--
--
R92-1294
Public
 --
 --
 53.8
9/23
--
--
DGC759
DEKALB
 --
 --
 49.9
9/21
--
--
J94-7
Public
 --
 --
 44.3
9/20
--
--
DK LDKX54589
Delta King
 --
 --
 41.2
9/27
--
--
Overall mean
 --
 --
 52.4
 
LSD (.10)
 --
 --
  5.5
 
Error degrees of freedom
 --
 --
 52
 
CV (%)
 --
 -- 
  7.7
 
R2(%)
 --
 --
 75
 
1Leeper Silty Clay.
2No 1995 and 1996 statistics.
3This data was not taken.


Table 56. Maturity Group VI Early Soybeans Planted May 12, 1997, at Mississippi State University in Starkville1
Variety Brand Yield2 Maturity date Plant height Lodging score
1995 1996 1997
  bu/a bu/a bu/a   in  
Released Varieties
97b61
Pioneer
 --
 --
 68.0
10/14
31
2
723
Buckshot
 --
 --
 64.6
10/12
26
2
9761
Pioneer
 --
 --
 58.7
10/12
29
2
H6191
Hartz
 --
 --
 58.6
10/12
26
1
A6961
Asgrow
 --
 --
 57.7
10/08
30
2
66
Buckshot
 --
 --
 56.9
10/08
31
2
DP 3640
Deltapine
 --
 --
 56.8
10/02
30
2
DP 3681
Deltapine
 --
 --
 56.5
10/11
25
1
9692
Pioneer
 --
 --
 56.4
10/06
26
1
H6255
Hartz
 --
 --
 56.1
9/30
26
2
Dillon
Public
 --
 --
 55.6
9/26
27
2
Hy 663
HyPerformer
 --
 --
 54.8
10/02
29
2
S65-50
NK
 --
 --
 54.7
9/30
26
1
BOGGS
SGA
 --
 --
 54.2
10/06
23
1
9631
Pioneer
 --
 --
 54.1
9/30
27
2
RVS 678
Terra
 --
 --
 53.2
10/06
29
2
Musen
Public
 --
 --
 53.0
10/12
28
2
A6297
Asgrow
 --
 --
 51.4
9/30
25
1
S62-62
NK
 --
 --
 50.6
9/22
24
1
699
Riverside
 --
 --
 50.6
10/08
26
1
A6711
Asgrow
 --
 --
 50.5
10/02
22
1
Young
Public
 --
 --
 50.2
10/01
34
2
A6785
Asgrow
 --
 --
 50.0
10/06
25
1
TV6792
Terral
 --
 --
 49.0
9/23
24
2
HBK 67
Hornbeck
 --
 --
 48.7
10/11
26
2
Lamar
Public
 --
 --
 47.2
10/06
27
2
9611
Pioneer
 --
 --
 44.9
9/23
21
2
TN6-90
Public
 --
 --
 43.4
10/01
24
1
Experimental Lines
HBK X9666
Hornbeck
 --
 --
 59.9
10/06
31
2
V88-494
Public
 --
 --
 53.6
10/06
25
1
R92-1258
Public
 --
 --
 53.2
9/30
27
1
HBK X9668
Hornbeck
 --
 --
53.0
10/06
29
2
SC89-147
Public
 --
 --
 52.0
10/06
28
2
R90-149s
Public
 --
 --
 49.7
10/01
27
1
DGC762
DEKALB
 --
 --
 44.9
9/26
25
2
R93-151
Public
 --
 --
 44.3
9/23
23
1
Overall mean
 --
 --
 53.1
 
LSD (.10)
 --
 --
  4.1
 
Error degrees of freedom
 --
 --
 72
 
CV (%)
 --
 -- 
  5.7
 
R2(%)
 --
 --
 83
 
1Leeper Silty Clay.
2No 1995 and 1996 statistics.


Table 57. Roundup Ready Soybeans (Maturity Group IV Early and Late) Planted May 12, 1997, at Mississippi State University in Starkville.1
Variety Brand Yield2 Maturity date Plant height Lodging score
1995 1996 1997
  bu/a bu/a bu/a   in  
Released Varieties
H4998RR3
Hartz
 --
 --
 36.3
9/21
32
2
H4994RR
Hartz
 --
 --
 32.2
9/15
20
1
SF477RR
SF Services
 --
 --
 25.9
9/9
21
1
AG4702
Asgrow
 --
 --
 24.2
9/3
20
1
AG45014
Asgrow
 --
 --
 24.1
9/3
21
1
AG46014
Asgrow
 --
 --
 22.7
9/3
18
1
AG4701
Asgrow
 --
 --
 18.8
9/1
20
1
TV4666RR4
Terral
 --
 --
 18.7
9/3
20
1
RT4464
MFA Morsoy
 --
 --
 14.0
9/3
18
1
Experimental Lines
DK LDKX45478
Delta King
 --
 --
 26.3
9/6
21
1
X9753RR
NK
 --
 --
 26.8
9/15
18
1
SB-HBK X9648RR
Hornbeck
 --
 --
 25.6
9/9
26
1
UAPX 0063
Dyna-Gro
 --
 --
 18.6
9/3
21
1
SB-HBK X9746RR4
Hornbeck
 --
 --
 10.05
8/24
21
1
Overall mean
 --
 --
 23.1
 
LSD (.10)
 --
 --
  4.4
 
Error degrees of freedom
 --
 --
 26
 
CV (%)
 --
 -- 
 13.7
 
R2(%)
 --
 --
 88
 
1Leeper Silty Clay.
2No 1995 and 1996 statistics.
3Harvested September 21, 1997
4Early Maturing.
5Shattered.


Table 58. Roundup Ready Soybeans (Maturity Group V Early) Planted May 12, 1997, at Mississippi State University in Starkville.1
Variety Brand Yield2 Maturity date Plant height Lodging score
1995 1996 1997
  bu/a bu/a bu/a   in  
Released Varieties
H5088RR
Hartz
 --
 --
 44.4
9/23
25
2
H5545RR
Hartz
 --
 --
 43.8
9/24
25
2
AP543RR
AgriPro
 --
 --
40.0
9/17
20
1
SG567RR
Sure-Grow
 --
 --
 38.0
9/21
25
2
RT541RR
MFA Morsoy
 --
 --
37.7
9/15
20
1
SF567RR
SF Services
 --
 --
 37.3
9/21
21
2
AG5602RR
Asgrow
 --
 --
 36.8
9/20
18
1
H5855RR
Hartz
 --
 --
 36.5
9/21
19
2
TV5666RR
Terral
 --
 --
 35.8
9/21
23
2
H5351RR
Hartz
 --
 --
 35.3
9/23
20
2
AG5601RR
Asgrow
 --
 --
 32.3
9/21
18
1
Experimental Lines
DP 5767 RR
Deltapine
 --
 --
 48.6
9/21
23
2
DP 5644 RR
Deltapine
 --
 --
 42.1
9/21
21
2
DGC7550RR
DEKALB
 --
 --
 41.9
9/20
21
2
SB-HBK X9755RR
Hornbeck
 --
 --
 41.0
9/20
21
1
DGC550RR
DEKALB
 --
 --
 40.2
9/21
22
2
DGC7540RR
DEKALB
 --
 --
 39.1
9/15
21
1
TVX 5466RR
Terral
 --
 --
 37.2
9/17
22
2
DGC7530RR
DEKALB
 --
 --
 37.0
9/21
21
2
SB-HBK X9654RR
Hornbeck
 --
 --
 36.5
9/15
18
2
SB-HBK X9754RR
Hornbeck
 --
 --
 36.4
9/17
20
2
DK LDKX58974RR
Delta King
 --
 --
 35.0
9/23
20
2
DK LDKX51155RR
Delta King
 --
 --
 32.8
9/15
19
2
Overall mean
 --
 --
 38.5
 
LSD (.10)
 --
 --
  6.5
 
Error degrees of freedom
 --
 --
 44
 
CV (%)
 --
 -- 
 12.2
 
R2(%)
 --
 --
 53
 
1Leeper Silty Clay.
2No 1995 and 1996 statistics.


Table 59. Roundup Ready Soybeans (Maturity Group V Late) Planted May 12, 1997, at Mississippi State University in Starkville.1
Variety Brand Yield2 Maturity date Plant height Lodging score
1995 1996 1997
  bu/a bu/a bu/a   in  
Released Varieties
SG617RR
Sure-Grow
 --
 --
 45.1
9/30
29
2
HX60001RR
Hartz
 --
 --
 43.2
10/02
23
2
SG597RR
Sure-Grow
 --
 --
 43.1
9/26
31
2
H5889RR
Hartz
 --
 --
 40.8
9/22
33
2
S59-V6RR
NK
 --
 --
 39.8
9/26
18
1
AG61O1RR
Asgrow
 --
 --
 36.2
9/23
27
1
AG59O1RR
Asgrow
 --
 --
 36.0
9/26
19
1
AG58O1RR
Asgrow
 --
 --
 35.8
9/26
23
1
AP588RR
AgriPro
 --
 --
 34.1
9/23
22
1
H5999RR
Hartz
 --
 --
 34.0
9/22
22
1
Experimental Lines
SB-HBK X9758RR
Hornbeck
 --
 --
 42.6
9/27
20
1
DP 596O RR
Deltapine
 --
 --
 42.2
9/22
23
1
DP 5806 RR
Deltapine
 --
 --
 41.0
9/23
21
2
TVX 5866RR
Terral
 --
 --
 39.2
9/27
21
1
DGC7580RR
DEKALB
 --
 --
 38.7
9/30
21
2
DK LDKX53234RR
Delta King
 --
 --
 32.8
9/30
23
1
Overall mean
 --
 --
 39.0
 
LSD (.10)
 --
 --
  4.7
 
Error degrees of freedom
 --
 --
 30
 
CV (%)
 --
 -- 
  8.7
 
R2(%)
 --
 --
 74
 
1Leeper Silty Clay.
2No 1995 and 1996 statistics.