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2005 Minnesota Hybrid Corn Performance Trials
Prepared by: Tom Hoverstad, Dale Hicks, George
Nelson, and Steve Quiring
University of Minnesota Agricultural Experiment Station
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RESULTS
Results of the Minnesota Corn Hybrid Evaluation
Program are presented in this bulletin. The program was
conducted by the University of Minnesota Agricultural Experiment
Station to provide unbiased information for
use by corn growers when they choose hybrids to buy and grow.
The program was financed in part by entry
fees from private seed companies that chose to enter their hybrids
for testing.
TEST LOCATIONS
Test zones, locations and maturities are as
follows:
Southern Zone: Lamberton, Waseca, and Plainview
- Early Maturity
Trial - 103 Relative Maturity (RM) and earlier hybrids
- Late
Maturity Trial - 104 RM and later hybrids
Central Zone: Morris and Rosemount
- Early Maturity Trial - 95
RM and earlier hybrids
- Late Maturity Trial - 96 RM and later
hybrids
Northern Zone: Staples and Rothsay
TESTING PROCEDURE
Entries: Each seed corn company could enter
up to six hybrids per zone. Entries in each trial were based
on
the Relative Maturity (RM) provided by the company. The University
of Minnesota Corn Testing Committee
could also choose and enter hybrids in each test. For this reason,
there may be more than six hybrids for a
company in a test.
PRESENTATION OF DATA
Yields are given for individual locations along
with yields and harvest moisture contents averaged across
locations for 2005. Reported yields are adjusted to 15.5% grain
moisture. Hybrids are ranked within a maturity
group by moisture content averaged across locations for 2005.
LEAST SIGNIFICANT DIFFERENCE
The LSD (Least Significant Difference) figures
at the bottom of the yield columns in the tables are statistical
measures of variability in the trials. These values may be used
to determine whether the difference between
any two hybrids is likely to be a real difference or just natural
variation.
If the yield difference between two hybrids is equal to or greater
than the LSD, then one can be confident that
the two hybrids probably differ in yield potential. We show LSD
values with a 0.2 alpha level which means
that when two hybrids differ in yield by the LSD value or more,
one can be 80% confident that the two hybrids
differ in yield potential. The higher yielding one is the better
hybrid from the yield standpoint. If the yield
difference between two hybrids is less than the LSD, the two
hybrids probably do not differ significantly in
yield potential.
Table 1. Participating
Companies
Names of companies participating in the 2005
trials:
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