O H I O
S O Y B E A N
P E R
F O R M A N C E T R I A L
Chris D. Kroon Van Diest, Research Associate, Dept. of Horticulture &
Mark Sulc, Professor,
Dept of Horticulture and Crop Science
John McCormick, Research
Associate, Dept. of Horticulture
& Crop Science
Professor, Dept. of Plant Pathology
The Ohio State University, College of Food, Agriculture and Environmental
Ohio State University Extension and OARDC
Edzard van Santen,
Professor, Dept. of Agronomy & Soils, Auburn University
The purpose of the Ohio Soybean Performance Trials is to evaluate soybean
varieties for yield, and other agronomic characteristics. This evaluation gives
soybean producers comparative information for selecting the best varieties for
their unique production systems.
FIELD PLOT DESIGN
The entries for each test site were planted in a randomized complete-block
design. Each entry was replicated four times and planted in plots 40 ft. long
and 5 ft. wide containing four rows seeded at 140,000 seeds per acre.
METHOD OF CONDUCTING TRIALS
Entries in Trials.
Performance of entries in The Ohio Soybean Performance Trials are published if
seed will be available to Ohio soybean producers for the following planting
season. All 2011 entries were submitted voluntarily by seed companies and the
Ohio Seed Improvement Association. Entry fee charges were paid per entry and
Test by Type. Varieties are
grouped, tested and analyzed by type and maturity. All normal and Liberty Link
varieties are tested as a group.
Roundup Ready varieties are tested in two groups (early and late) based
on maturity. The same production, testing and evaluation techniques, except for weed
control, were used for normal tests and Roundup Ready tests. The performance of
normal & Liberty Link entries and Roundup Ready entries is not comparable
statistically because they were not tested and analyzed together. Varieties
should only be compared within a test group not between test groups.
MEASUREMENTS AND RECORDS
Relative Maturity. Relative
maturity is a rating designed to account for all of the factors that affect
maturity date and includes variety, planting date, weather, latitude and
disease. Maturity is defined as the “95% brown pods” stage. A variety with a
Relative Maturity rating of 3.5 will reach the 95% brown pod stage 5 days later
than a variety with a rating of 3.0.
The varieties in each table were tested as a group, and their performance
analyzed and reported for that group.
Seed size is reported as seeds per pound.
Yield. Each soybean variety
was harvested when the moisture content was between 8 and 12 percent and
yields reported in
bushels per acre at 13 percent moisture.
Lodging score. There was no lodging in 2011.
Protein and Oil %. Analysis was determined by near infrared transmittance
technology. The test was performed by the OSU Grain Quality Lab using a Tecator
Infratec whole grain analyzer calibrated with the Composition Systems
Calibration developed at Iowa State University and is reported at 13% moisture.
Phytophthora Resistance Genes.
Phytophthora resistance genes were determined using a hypocotyl inoculation
test. In this test, several races of Phytophthora are used to determine
the presence or absence of a particular Rps gene. The Rps genes (Rps1a,
Rps1c, etc.) detected in a variety are listed in Tables 3-8. "ND"
indicates that the Rps gene(s) could not be determined, and the variety
has Rps6, Rps8 or a Rps gene combination of either 1c+3a or
1k+3a. "None" indicates no Rps genes were detected. See
Table 12 for this information.
See Table 12 for this information.
Phytophthora Partial Resistance.
All varieties were evaluated for partial resistance. Partial resistance is a
multigenic characteristic that provides some level of protection against all
known races of Phytophthora. Ratings of 3.0 to 3.9 are considered high levels of
partial resistance and will provide good levels of control. Ratings of 4.0
to 4.9 are considered moderate and will allow some yield loss when environmental
conditions favor infection by Phytophthora. Ratings of 5.0 to 5.9 indicate low
levels partial resistance or protection against Phytophthora. Ratings of 6.0 and
greater indicate very low levels and severe yield losses will result when
Phytophthora pressure is high. For
fields with a history of Phytophthora root and stem rot, varieties should have a
combination of both an Rps gene plus good partial resistance to provide
the best protection.
LSD. A Least Significant Difference (LSD) for yield was computed for each
maturity group. LSD's are reported in bushels per acre at 13 percent moisture.
Yields of two varieties within a maturity group are significantly different 90%
of the time if their yields differ by more than the LSD value shown for that
DATA USE. Inclusion of
entries in the Ohio Soybean Performance Trials
does not constitute an endorsement of a particular entry by the Ohio State
University, Ohio Agricultural Research and Development Center, or the
Ohio State University Extension.
Table 1: The 2011 Ohio Soybean Performance
Trials, Production Practices
Soil and Crop Background
Mercer Blount Crosby
Soil Test P(ppm)
Soil Test K(ppm)
Corn Corn Corn
Corn Corn Corn
Normal Variety Weed Control
Preemerge (all sites)
Valor XLT / Dual II
/ Roundup UltraMax
(all sites) Basagran
Roundup Ready Variety Weed Control
(all sites) Valor XLT /
Dual II /
Postemerge (all sites)
Roundup UltraMax /
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University Extension are available to clientele on a nondiscriminatory basis
without regard to race, color, creed, religion, sexual orientation, national
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furtherance of Cooperative Extension work, Acts of May 8 and June 30, 1914, in
cooperation with the U.S. Department of Agriculture, Keith L. Smith, Director,
Ohio State University Extension.