Mississippi State University, Starkville
| Soil type | Marietta fine sandy loam |
| Soil pH | 7.4 |
| Soil fertility | P -- H+, K -- H |
| Fertilizer added | Nitrogen @ 200 lb/a |
| Herbicide application | Preplant -- Aatrex @ 2 qt/a + Dual @ 1 qt/a Postemergence -- Bladex @ 2 qt/a |
| Irrigation | Furrow applied -- June 25, July 10, and July 18 |
| Planting date | March 24 |
| Harvest date | September 4 |
Crop Summary
Excess rain and saturated soil moisture until June 15 stunted the plants. Plants did not die and did not grow for 6 weeks after emergence. The weather then turned extremely hot and dry. Even with irrigation, the corn could not recuperate from the extreme heat. Natural rainfall helped corn more than irrigation because of the cloud cover and the cooling of temperatures. This area has been planted in corn for several years. The seed bed was prepared in rows last fall. A burn down was applied and the rows were rolled by a roller-packer prior to planting.
Rainfall Summary
| March | 4.50 inches |
| April | 5.10 inches |
| May | 7.70 inches |
| June | 5.00 inches |
| July | 3.30 inches |
| August | 3.48 inches |
| Total | 29.08 inches |
| Table 15. Results from 19 early- maturing corn hybrids grown with irrigation on a Marietta fine sandy loam soil at the Mississippi State University, Starkville¹. |
|||||||||
|---|---|---|---|---|---|---|---|---|---|
| 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 | |||
TV2140 |
Terral |
138.3 |
-- |
-- |
0 |
0 |
46 |
11.6 |
30 |
TR1157 |
Terra |
137.5 |
137.9 |
-- |
0 |
0 |
46 |
11.5 |
31 |
32K61 |
Pioneer |
135.6 |
-- |
-- |
0 |
0 |
38 |
12.4 |
28 |
RX 897 |
Asgrow |
128.7 |
132.2 |
-- |
0 |
0 |
43 |
11.5 |
28 |
TR1087 |
Terra |
127.2 |
-- |
-- |
0 |
0 |
32 |
10.2 |
29 |
TR1106 |
Terra |
126.3 |
-- |
-- |
0 |
0 |
35 |
10.2 |
30 |
5510A |
Funk's DG |
125.9 |
127.5 |
-- |
0 |
0 |
38 |
13.4 |
28 |
TR1154 |
Terra |
125.3 |
133.9 |
114.2 |
0 |
0 |
45 |
11.0 |
28 |
ATX770 |
AgraTech |
123.1 |
-- |
-- |
0 |
0 |
42 |
11.0 |
29 |
TV2100 |
Terral |
122.5 |
-- |
-- |
0 |
0 |
38 |
8.1 |
28 |
RX813 |
Asgrow |
120.9 |
-- |
-- |
0 |
0 |
35 |
11.1 |
27 |
3245 |
Pioneer |
120.5 |
141.3 |
118.1 |
0 |
0 |
36 |
11.6 |
28 |
DK626 |
DeKalb |
118.1 |
-- |
-- |
0 |
0 |
41 |
10.1 |
28 |
TVX21570 |
Terral |
118.1 |
-- |
-- |
0 |
0 |
48 |
12.1 |
29 |
DK618 |
DeKalb |
117.7 |
-- |
-- |
0 |
0 |
35 |
10.6 |
26 |
3260 |
Pioneer |
114.8 |
124.7 |
109.0 |
0 |
0 |
45 |
12.1 |
26 |
TR1066 |
Terra |
114.6 |
-- |
-- |
0 |
0 |
39 |
10.7 |
30 |
ATX721 |
AgraTech |
112.7 |
-- |
-- |
0 |
0 |
38 |
10.5 |
28 |
TVX21370 |
Terral |
107.0 |
-- |
-- |
0 |
0 |
46 |
11.0 |
28 |
Overall Mean |
122.9 |
132.9 |
113.8 |
||||||
LSD (.10) |
15.2 |
11.6 |
8.6 |
||||||
Error Degrees of Freedom |
72 |
40 |
24 |
||||||
CV (%) |
11.7 |
11.6 |
12.1 |
||||||
R² |
34 |
56 |
91 |
||||||
¹Planted March 24; harvested September 4.
| Table 16. Results from 25 late-maturing corn hybrids grown with irrigation on a Marietta fine sandy loam soil at Mississippi State University, Starkville¹. |
|||||||||
|---|---|---|---|---|---|---|---|---|---|
| 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 | |||
3223 |
Pioneer |
126.3 |
138.1 |
127.3 |
0 |
0 |
45 |
12.1 |
30 |
RX 938 |
Asgrow |
121.7 |
130.4 |
113.1 |
0 |
0 |
47 |
13.9 |
26 |
HY9919V |
HyPerformer |
118.0 |
117.5 |
-- |
0 |
0 |
38 |
12.6 |
28 |
TR1226 |
Terra |
117.7 |
-- |
-- |
0 |
0 |
42 |
10.8 |
28 |
DK714 |
DeKalb |
116.0 |
-- |
-- |
0 |
0 |
43 |
13.2 |
28 |
3085 |
Pioneer |
114.7 |
119.8 |
103.9 |
0 |
0 |
46 |
15.0 |
23 |
HS 9843 |
HyPerformer |
114.3 |
126.5 |
122.1 |
0 |
0 |
43 |
11.8 |
28 |
DK687 |
DeKalb |
113.4 |
-- |
-- |
0 |
0 |
40 |
11.8 |
24 |
3167 |
Pioneer |
112.8 |
123.7 |
106.6 |
0 |
0 |
40 |
15.6 |
28 |
DK683 |
DeKalb |
111.8 |
129.9 |
127.2 |
0 |
0 |
40 |
11.4 |
26 |
XP 9317 |
Asgrow |
110.8 |
-- |
-- |
0 |
0 |
44 |
12.9 |
28 |
TR1167 |
Terra |
109.7 |
122.7 |
117.4 |
0 |
0 |
43 |
11.7 |
32 |
TR1185 |
Terra |
109.5 |
115.2 |
105.6 |
0 |
0 |
46 |
13.0 |
29 |
3163 |
Pioneer |
106.7 |
122.6 |
105.6 |
0 |
0 |
39 |
11.6 |
25 |
HY 9899V |
HyPerformer |
105.4 |
104.5 |
97.5 |
0 |
0 |
46 |
12.5 |
27 |
8460 |
Mycogen |
105.3 |
113.6 |
106.3 |
0 |
0 |
45 |
13.1 |
27 |
TV 2930 |
Terral |
104.7 |
111.5 |
101.1 |
0 |
0 |
45 |
13.5 |
28 |
967 |
AgraTech |
103.8 |
110.7 |
100.4 |
0 |
0 |
39 |
13.1 |
27 |
AP9909 |
AgriPro |
103.5 |
-- |
-- |
0 |
0 |
42 |
13.6 |
27 |
TR702 |
Terra |
103.2 |
111.2 |
101.2 |
0 |
0 |
38 |
14.9 |
27 |
787 |
AgraTech |
100.6 |
-- |
-- |
0 |
0 |
44 |
11.1 |
31 |
ATX6714 |
AgraTech |
97.1 |
-- |
-- |
0 |
0 |
336 |
10.5 |
26 |
5688 |
Funk's DG |
95.1 |
-- |
-- |
0 |
0 |
42 |
15.1 |
25 |
5670 |
Funk's DG |
88.8 |
102.5 |
-- |
0 |
0 |
44 |
13.4 |
25 |
DK706 |
DeKalb |
84.2 |
101.1 |
94.3 |
0 |
0 |
48 |
13.4 |
28 |
Overall Mean |
107.8 |
117.7 |
108.6 |
||||||
LSD (.10) |
14.0 |
10.3 |
9.5 |
||||||
Error Degrees of Freedom |
96 |
128 |
168 |
||||||
CV (%) |
12.3 |
11.8 |
14.5 |
||||||
R² |
46 |
62 |
71 |
||||||
¹Planted March 24; harvested September 4.