Location 2 - Grower Cooperator -- Dulaney Farms, Clarksdale

Soil Type Tunica silty clay
Soil pH 6.7
Soil fertility P - H, K - H+
Fertilizer added None
Herbicide application Dual PPI @ 3.0 pt/a
Fungicide application 2 applications of Benlate @ 0.5 lb/a each at R3 & R5 plus 0.5 pt/a Penetrator+
Irrigation July 14, July 28, and August 28
Planting date Group IV 4/15/97
Group V 5/6/97
Harvest date Group IV Early 9/3/97
Group IV Late 9/15/97
Group V 10/2/97

Location Summary

Group IV beans, especially the early Group IVs, may have incurred some yield and plant height reduction due to excessive rains in June. Irrigation was required three times to supplement rainfall in July and August. Insect pressure was light and never reached threshold levels in any of the test plots. Temperatures were favorable with the exception of one week when daytime highs were in the 95- to 98-degree range.


Rainfall Summary


April 2.27 inches
May 5.38 inches
June 5.32 inches
July 1.92 inches
August 2.80 inches
September 3.98 inches
Total 21.67 inches

Rainfall Graph - Location 2


Table 39. Maturity Group IV Early Soybeans Planted April 15, 1997, in Clarksdale, Coahoma County.1
Variety2 Brand Yield3 Maturity date Plant height Lodging score
1995 1996 1997
  bu/a bu/a bu/a   in  
HBK4755
Hornbeck
 --
 --
 44.7
8/25
18
2
STRESSLAND
Public
 --
 --
 37.3
8/19
18
2
S46-44
NK
 --
 --
 35.0
8/25
20
2
TV4664
Terral
 --
 --
 33.1
8/28
17
2
AP 4880
AgriPro
 --
 --
 31.4
8/28
16
2
TV4479
Terral
 --
 --
 31.0
8/25
17
2
HY 4540
HyPerformer
 --
 --
 28.5
8/25
16
2
A4715
Asgrow
 --
 --
 28.2
8/25
16
2
A4341
Asgrow
 --
 --
 24.9
8/15
16
2
DP 3478
Deltapine
 --
 --
 24.4
8/28
14
2
TN4-86
Public
 --
 --
 15.4
8/29
15
2
Overall mean
 --
 --
 30.4
 
LSD (.10)
 --
 --
 11.8
 
Error degrees of freedom
 --
 --
 20
 
CV (%)4
 --
 --
 27.5
 
R2 %
 --
 --
 59
 
1Tunica Silty Clay Soil.
2All are released varieties.
3No 1995 or 1996 averages.
4The coefficient of variance, which measures the relative precision of a trial, is high, indicating that yields are erratic and may not be reliable data.


Table 40. Maturity Group IV Late Soybeans Planted April 15, 1997, in Clarksdale, Coahoma County.1
Variety Brand Yield2 Maturity date Plant height Lodging score
1995 1996 1997
  bu/a bu/a bu/a   in  
Released Varieties
499
Riverside
 --
 --
 67.7
9/15
42
3
9511
Pioneer
 --
 --
 65.1
9/12
34
3
TN4-94
Public
 --
 --
 63.7
9/15
28
2
KS4895
Public
 --
 --
 63.6
9/12
34
3
S51-00
NK
 --
 --
 63.1
9/12
24
2
Dixie 478
Dixie
 --
 --
 61.8
9/2
30
2
HBK 49
Hornbeck
 --
 --
 60.8
9/15
39
4
HBK 5149
Hornbeck
 --
 --
 54.4
9/10
26
2
Manokin
Public
 --
 --
 50.9
9/12
22
1
TN4-86
Public
 --
 --
 49.2
9/2
23
1
DK4860
Delta King
 --
 --
 47.2
8/28
20
1
3495
Dyna-Gro
 --
 --
 46.5
9/15
32
3
Wicomico
Public
 --
 --
 42.7
9/12
19
2
9482
Pioneer
 --
 --
 41.9
8/28
23
3
A4922
Asgrow
 --
 --
 38.3
9/2
22
2
CX 499c
DEKALB
 --
 --
 38.1
8/28
27
2
S48-14
NK
 --
 --
 33.2
8/28
17
2
TV 4770
Terral
 --
 --
 32.9
9/2
21
1
Delta Grow 4710
Delta Grow
 --
 --
 24.9
9/2
22
1
Experimental Lines
HBK X9748
Hornbeck
 --
 --
 60.4
9/5
27
2
TVX4975
Terral
 --
 --
 55.2
9/12
30
2
DPS 9749
Deltapine
 --
 --
 53.7
9/8
27
1
RVS 490
Riverside
 --
 --
 52.2
9/15
37
2
DGC751
DEKALB
 --
 --
 36.1
8/28
19
1
DK LDKX49994
Delta King
 --
 --
 32.4
9/2
25
2
DGC750
DEKALB
 --
 --
 27.7
8/25
17
2
Overall mean
 --
 --
 48.6
 
LSD (.10)
 --
 --
  9.8
 
Error degrees of freedom
 --
 --
 50
 
CV (%)
 --
 --
 14.7
 
R2 %
 --
 --
 84
 
1Tunica Silty Clay Soil.
2No 1995 or 1996 averages.


Table 41. Maturity Group V Early Soybeans Planted May 6, 1997, in Clarksdale, Coahoma County.1
Variety Brand Yield Maturity date Plant height Lodging score
19952 1996 1997
  bu/a bu/a bu/a   in  
Released Varieties
499
Riverside
 67.4
 --
 68.6
9/19
37
2
Delsoy 5500
Public
 55.8
 59.7
 65.5
9/22
21
1
H5050
Hartz
 51.4
 82.3
 64.9
9/22
27
1
TV 5770
Terral
 --
 58.5
 64.1
9/24
20
1
HY 574
HyPerformer
 46.5
 84.2
 63.6
9/24
22
1
H5218
Hartz
 51.2
 81.3
 62.6
9/19
26
1
Hutcheson
Public
 56.0
 76.9
 62.6
9/24
22
1
R Robin-5
Riverside
 60.2
 51.2
 61.4
9/26
21
1
RVS 77
Riverside
 58.6
 71.9
 60.2
9/25
24
1
S57-11
NK
 32.5
 79.0
 59.9
9/24
23
1
DK 5475
Delta King
 55.9
 70.1
 59.5
9/19
20
1
CX 510C
DEKALB
 --
 33.2
 59.1
9/15
20
1
RVS 549
Riverside
 50.0
 81.6
 58.5
9/20
17
1
Pace
Public
 52.5
 56.0
 57.7
9/22
19
1
A5547
Asgrow
 53.5
 69.0
 57.6
9/20
24
1
TV5495
Terral
 51.7
 45.0
 57.4
9/22
29
2
Rhodes
Public
 44.7
 72.0
 56.3
9/24
23
1
RVS 529I
Riverside
 45.0
 64.2
 56.0
9/19
43
3
H5454
Hartz
 51.7
 74.8
 52.5
9/22
13
1
TN5-95
Public
 36.2
 55.4
 50.8
9/15
19
1
DP 3519S
Deltapine
 22.3
 25.7
 46.4
9/15
16
1
TV 5797
Terral
 53.5
 48.0
 45.8
9/19
18
1
Experimental Lines
DPS 9752
Deltapine
 --
 --
 64.5
9/19
25
2
DK LDKX51496
Delta King
 --
 --
 63.6
9/24
21
1
R93-17
Public
 --
 --
 56.6
9/19
18
1
DK LDKX57722
Delta King
 --
 --
 52.6
9/17
19
1
Delta Grow 5330
Delta Grow
 --
 --
 52.4
9/18
20
1
DGC753
DEKALB
 --
 --
 52.2
9/19
17
1
J94-5
Public
 --
 --
 29.2
9/08
18
1
Overall mean
 --
 61.7
 56.9
 
LSD (.10)
 --
  9.6
  7.2
 
Error degrees of freedom
 --
 88
 58
 
CV (%)
 --
 11.4
  9.3
 
R2 %
 --
 89
 78
 
1Tunica Silty Clay Soil.
21995 was not divided into early and late.


Table 42. Maturity Group V Late Soybeans Planted May 6, 1997, in Clarksdale, Coahoma County.1
Variety Brand Yield Maturity date Plant height Lodging score
19952 1996 1997
  bu/a bu/a bu/a   in  
Released Varieties
S59-60
NK
 61.4
 84.1
 68.3
9/25
25
1
TV5926
Terral
 --
 --
 66.7
9/22
23
1
9594
Pioneer
 --
 67.9
 66.0
9/25
24
1
A5944
Asgrow
 65.8
 77.5
 64.8
9/29
20
1
A5843
Asgrow
 58.5
 52.4
 64.2
9/25
20
1
A5959
Asgrow
 --
 84.3
 63.9
9/19
25
2
DK 5850
Delta King
 49.6
 66.8
 63.3
9/25
27
1
A5848
Asgrow
 59.0
 84.1
 62.6
9/29
17
1
3576
Dyna-Gro
 59.0
 71.3
 60.0
9/25
23
1
CX570C
DEKALB
 --
 --
 59.9
9/22
21
1
DK5995
Delta King
 --
 --
 58.8
9/22
21
1
Hutcheson
Public
 56.0
 72.1
 58.5
9/25
23
1
HLA572
Hartz
 --
 --
 57.9
9/25
27
1
9592
Pioneer
 58.6
 77.7
 56.0
9/25
30
2
DP 3588
Deltapine
 61.0
 63.5
 55.0
9/25
25
1
ACCOMAC
Public
 40.9
 28.5
 55.0
9/25
23
1
TV 5893
Terral
 60.7
 56.9
 54.7
9/19
24
2
UARK-5896
Public
 52.8
 81.7
 53.9
9/25
23
1
55
Buckshot
 36.4
 53.9
 52.5
9/22
23
1
Experimental Lines
DGC759
DEKALB
 --
 --
 69.3
9/25
20
1
HBK X9659A
Hornbeck
 --
 --
 63.9
9/25
19
1
HBK X9657A
Hornbeck
 --
 --
 62.5
9/25
31
2
R92-1294
Public
 --
 85.9
 62.3
9/22
23
1
DK LDKX54589
Delta King
 --
 --
 60.4
9/29
22
1
DGC758
DEKALB
 --
 --
 55.8
9/19
20
2
J94-7
Public
 --
 --
 51.0
9/19
20
1
S92-1679
Public
 --
 --
 47.0
9/19
25
1
Overall mean
 --
 70.4
 59.8
 
LSD (.10)
 --
 11.3
  5.9
 
Error degrees of freedom
 --
 60
 52
 
CV (%)
 --
 11.8
  7.2
 
R2 %
 --
 76
 76
 
1Tunica Silty Clay Soil.
21995 was not divided into early and late.