| 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 | |
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.
| 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 |
| 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. | |||||||