Soil type Grenada silt loam
Soil pH 6.4
Soil fertility P--low, K--high
Fertilizer added Preplant--0-18-36 @ 400 lb/a
Sidedress--Anhydrous ammonia @ 150 lb/a on 5/30/94
Herbicide application Preemergence--Dual @ 1 qt/a of plus Atrazine @ 2 qt/a
Planting date April 14
Harvest date September 12
The growing season was ideal for corn. Temperatures in the early spring were moderate with adequate moisture. The midsummer temperatures were near normal, especially during the time of pollination. Rainfall during midsummer was excellent throughout the grain maturation period. August temperatures were hot and rainfall amounts were low, resulting in a good dry-down period.
Inches
March 8.75
April 4.89
May 4.78
June 11.31
July 5.07
August 4.08
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Total 38.88
Table 2A. Results from 39 corn hybrids grown without irrigation at the MAFES North
Mississippi Branch, Holly Springs, 1994 (early maturity)
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Yield 2 yr Root Stalk Ear Harvested
Hybrid 1994 avg. Lodging Lodging Ht. Stand
Number Brand ---(bu/acre)--- (%) (%) (in) Moisture (x1000)
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X1183C Pioneer 111.9 -- 0 1 43 18.2 21.5
DK 649 Dekalb 104.6 96.3 0 0 37 19.1 20.5
RX 919 Asgrow 103.6 -- 0 0 50 21.2 20.5
3245 Pioneer 103.4 96.0 1 6 37 19.5 19.0
TR 1167 Terra 103.0 -- 0 1 41 19.4 23.0
4581 Deltapine 102.9 85.5 1 2 46 17.2 24.5
8936 Cargill 102.3 -- 0 5 47 21.7 24.5
8695 Deltapine 101.8 102.4 1 5 44 21.3 24.0
N 8206 ICI 101.6 -- 0 1 37 21.0 22.5
DK 683 Dekalb 101.6 -- 0 1 43 19.1 24.5
7997 Cargill 100.9 -- 0 1 41 18.7 24.0
ICI 8281 ICI 100.8 -- 0 1 41 17.9 20.0
5510 DynaGrow 98.9 110.3 0 4 37 19.4 25.0
TR 1185 Terra 98.9 -- 0 3 43 21.4 20.0
N 8020 Northrup King 98.3 -- 0 1 44 18.5 22.0
3394 Pioneer 97.3 83.9 0 2 39 17.6 22.5
X830 Southland 97.1 -- 0 4 46 23.0 21.0
888 AgraTech 96.8 84.8 0 0 44 19.1 21.0
4653 Deltapine 96.5 -- 0 3 40 19.6 23.5
4682 Deltapine 96.1 96.7 0 6 44 19.5 22.5
ICI 8220 ICI 95.9 -- 0 1 38 21.1 20.5
8327 Cargill 95.5 -- 0 1 46 18.9 24.5
N 7707 Northrup King 95.5 82.7 1 2 37 17.9 23.5
RX 899 Asgrow 94.9 76.9 1 1 39 19.8 22.5
TVX 2643 Terral 94.2 -- 0 2 45 18.5 21.5
5111 Southland 93.9 -- 0 1 44 19.3 22.5
HS 9773 HyPerformer 93.1 84.0 0 4 44 19.1 20.5
RX 897 Asgrow 92.7 78.8 0 1 41 19.5 20.5
TV 2543 Terral 92.1 71.6 1 3 41 18.2 23.5
810 AgraTech 90.6 -- 1 1 40 17.8 23.0
TR E1168 Terra 90.1 79.6 0 1 41 17.1 25.0
HS 9843 HyPerformer 89.4 81.3 0 0 43 19.3 20.0
N 7989 Northrup King 87.5 84.1 0 4 46 17.5 24.0
ORO 188 Mycogen 86.8 84.9 0 3 42 20.3 18.5
16W Zimmerman 84.0 -- 1 5 41 22.0 18.5
RX 801 Asgrow 83.2 -- 0 2 40 18.3 23.5
3115 Southland 80.6 -- 0 7 43 21.0 20.0
64W Zimmerman 77.1 -- 0 4 44 20.3 18.0
RX 907 Asgrow 77.1 -- 1 3 37 19.3 21.0
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Overall mean . . . . 95.2 87.0 Planted April 14
LSD @ .10. . . . . . 17.2 17.6 Harvested September 12
Error degrees of freedom 114 96
CV % . . . . . . . . 15.4 24.3
R squared % . .. . . 42 49
Table 2B. Results from 22 corn hybrids grown without irrigation at the MAFES North
Mississippi Branch, Holly Springs, 1994 (late maturity)
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Yield 2 yr Root Stalk Ear Harvested
Hybrid 1994 avg. Lodging Lodging Ht. Stand
Number Brand ---(bu/acre)--- (%) (%) (in) Moisture (x1000)
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X1183F Pioneer 113.1 103.9 0 0 41 19.1 16.5
3163 Pioneer 112.3 91.8 1 5 38 19.1 20.5
3167 Pioneer 108.4 90.6 0 1 41 21.7 22.5
DK 743 Dekalb 107.1 95.7 0 3 41 21.5 20.0
3154 Pioneer 104.2 -- 0 1 44 20.7 17.5
3156 Pioneer 102.4 -- 0 1 43 19.4 17.5
N 8656 Northrup King 96.5 -- 0 1 42 19.3 20.0
HY 9919 HyPerformer 94.2 -- 0 1 42 19.6 21.0
HB 847002 HyPerformer 92.5 -- 0 2 43 20.5 17.0
967 AgraTech 92.2 -- 0 2 43 20.9 16.5
XP 9380 Asgrow 90.5 -- 0 5 41 20.5 17.0
X810 Southland 90.2 -- 0 1 44 24.1 18.5
TV 2930 Terral 89.9 88.7 1 3 42 20.7 21.5
HY 9899V HyPerformer 88.6 -- 1 1 41 20.4 17.0
3085 Pioneer 86.6 91.8 0 4 45 22.1 16.0
3146 Pioneer 86.5 82.6 0 3 41 19.4 19.0
3165 Pioneer 85.5 92.0 1 0 44 20.8 17.0
N 8727 Northrup King 82.0 67.5 1 3 37 20.3 20.5
HS 9944 HyPerformer 81.7 76.7 1 2 41 18.4 16.5
TR 702E Terra 76.3 78.8 1 2 39 20.5 19.0
N 8811 Northrup King 72.2 72.3 1 5 39 20.4 20.0
DK 714 Dekalb 64.3 -- 3 2 42 19.3 20.5
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Overall Mean 91.7 86.0 Planted April 14
LSD @ .10 15.7 10.7 Harvested September 12
Error Degrees of Freedom 63 66
CV % . . . . . . . . 14.5 14.9
R squared %. . . . . 69 71