MAFES Black Belt Branch, Brooksville
| Soil type | Brooksville silty clay |
| Soil pH | 5.8 |
| Soil fertility | P -- H, K -- H |
| Fertilizer added | Preplant -- 300 lb 13-13-13 Sidedress -- Ammonium Nitrate @ 400 lb/a |
Herbicide application | Atrazine @ 2 qt/a + Lasso @ 3 qt/a |
| Planting date | April 2 |
| Harvest date | September 3 |
Crop Summary
A good stand was obtained at planting and had adequate moisture during most of the growing season. Dry conditions during early May and mid-June stressed plants during early development. The previous crop was roundup-ready soybeans. The land was disc and do-all flat just before planting.
Rainfall Summary
| March | 2.68 inches |
| April | 4.91 inches |
| May | 3.68 inches |
| June | 6.82 inches |
| July | 5.39 inches |
| August | 5.19 inches |
| Total | 28.67 inches |
| Table 7. Results from 17 early-maturing corn hybrids grown without irrigation on a Brooksville silty clay soil at the MAFES Black Belt Branch, Brooksville¹. |
|||||||||
|---|---|---|---|---|---|---|---|---|---|
| Hybrid number |
Brand name |
1997 yield |
2-year average |
3-year average |
Root lodging |
Stalk lodging |
Ear height |
Moisture content |
Harvested stand (x 1000) |
| bu/a | bu/a | bu/a | pct | pct | in | pct | |||
3394 |
Pioneer |
96.1 |
90.4 |
78.2 |
0 |
0 |
38 |
13.4 |
28 |
DK626 |
DeKalb |
93.8 |
-- |
-- |
0 |
0 |
41 |
14.6 |
27 |
RX813 |
Asgrow |
93.4 |
-- |
-- |
0 |
0 |
33 |
16.5 |
27 |
TR1106 |
Terra |
92.9 |
-- |
-- |
0 |
0 |
37 |
14.7 |
28 |
TR1066 |
Terra |
90.5 |
-- |
-- |
0 |
0 |
37 |
13.2 |
30 |
TR1087 |
Terra |
89.4 |
-- |
-- |
0 |
0 |
34 |
13.3 |
27 |
TV2100 |
Terral |
85.9 |
-- |
-- |
0 |
0 |
35 |
14.9 |
28 |
RX 897 |
Asgrow |
83.8 |
93.0 |
-- |
0 |
0 |
38 |
16.0 |
26 |
5510A |
Funk's DG |
83.7 |
76.7 |
-- |
0 |
0 |
35 |
22.5 |
26 |
TR1157 |
Terra |
80.3 |
81.9 |
-- |
0 |
0 |
44 |
15.4 |
28 |
TR1154 |
Terra |
78.4 |
83.1 |
77.1 |
0 |
0 |
46 |
15.9 |
28 |
32K61 |
Pioneer |
77.2 |
-- |
-- |
0 |
0 |
38 |
15.8 |
26 |
8011 |
Cargill |
73.3 |
-- |
-- |
0 |
0 |
34 |
14.7 |
24 |
TVX20770 |
Terral |
72.7 |
-- |
-- |
0 |
0 |
39 |
13.8 |
28 |
7770 |
Cargill |
72.5 |
81.8 |
-- |
0 |
0 |
30 |
12.4 |
21 |
TV2090 |
Terral |
62.9 |
-- |
-- |
0 |
0 |
29 |
11.7 |
22 |
3260 |
Pioneer |
54.8 |
60.9 |
60.0 |
0 |
0 |
23 |
10.1 |
15 |
Overall Mean |
81.3 |
81.1 |
71.8 |
||||||
LSD (.10) |
21.7 |
18.2 |
16.1 |
||||||
Error Degrees of Freedom |
64 |
48 |
24 |
||||||
CV (%) |
25.3 |
30.0 |
35.8 |
||||||
R² |
31 |
53 |
62 |
||||||
¹Planted April 2; harvested September 3.
| Table 8. Results from 20 late-maturing corn hybrids grown without irrigation on a Brooksville silty clay soil at the MAFES Black Belt Branch, Brooksville¹. | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Hybrid number |
Brand name |
1997 yield |
2-year average |
3-year average |
Root lodging |
Stalk lodging |
Ear height |
Moisture content |
Harvested stand (x 1000) |
| bu/a | bu/a | bu/a | pct | pct | in | pct | |||
8328 |
Cargill |
102.8 |
94.0 |
-- |
0 |
0 |
44 |
15.6 |
26 |
RX 938 |
Asgrow |
102.5 |
89.5 |
-- |
0 |
0 |
44 |
19.2 |
25 |
DK687 |
DeKalb |
101.8 |
-- |
-- |
0 |
0 |
43 |
15.7 |
28 |
3163 |
Pioneer |
100.5 |
97.9 |
88.8 |
0 |
0 |
39 |
16.5 |
24 |
DK683 |
DeKalb |
98.2 |
88.5 |
82.2 |
0 |
0 |
43 |
15.5 |
28 |
3223 |
Pioneer |
90.9 |
88.3 |
87.9 |
0 |
0 |
41 |
15.4 |
26 |
HS 9843 |
HyPerformer |
87.5 |
94.9 |
82.9 |
0 |
0 |
43 |
16.6 |
26 |
8311 |
Cargill |
83.8 |
-- |
-- |
0 |
0 |
48 |
15.5 |
28 |
TR1185 |
Terra |
82.7 |
84.7 |
76.5 |
0 |
0 |
48 |
19.2 |
29 |
8460 |
Mycogen |
82.1 |
90.8 |
80.8 |
0 |
0 |
44 |
19.4 |
28 |
HY9919V |
HyPerformer |
81.5 |
86.5 |
-- |
0 |
0 |
39 |
19.2 |
24 |
TR1167 |
Terra |
81.4 |
77.8 |
70.3 |
0 |
0 |
44 |
16.9 |
28 |
DK706 |
DeKalb |
80.3 |
88.6 |
74.6 |
0 |
0 |
46 |
16.8 |
26 |
HY 9899V |
HyPerformer |
75.9 |
79.3 |
71.6 |
0 |
0 |
46 |
19.0 |
26 |
TR702 |
Terra |
75.3 |
86.7 |
78.7 |
0 |
0 |
41 |
21.9 |
26 |
XP 9317 |
Asgrow |
72.1 |
-- |
-- |
0 |
0 |
48 |
19.4 |
27 |
AP9909 |
AgriPro |
70.0 |
-- |
-- |
0 |
0 |
46 |
21.1 |
28 |
3167 |
Pioneer |
68.5 |
77.2 |
63.5 |
0 |
0 |
37 |
20.7 |
26 |
3085 |
Pioneer |
68.2 |
80.1 |
72.5 |
0 |
0 |
36 |
18.2 |
16 |
TR1226 |
Terra |
65.4 |
-- |
-- |
0 |
0 |
43 |
20.1 |
24 |
Overall Mean |
83.6 |
87.0 |
77.5 |
||||||
LSD (.10) |
14.9 |
13.0 |
10.9 |
||||||
Error Degrees of Freedom |
76 |
112 |
132 |
||||||
CV (%) |
17.0 |
20.2 |
57 |
||||||
R² |
52 |
40 |
57 |
||||||
¹Planted April 2; harvested September 3.