Soybean Variety
Trials
2007 MICHIGAN
SOYBEAN PERFORMANCE REPORT
D. Wang and J. F. Boyse, Department of Crop and Soil Science
This report provides information on the performance
of Conventional and Roundup Ready soybean varieties in Michigan in 2007.
The presentation of data for the entries tested does not suggest approval
or endorsement of varieties by Michigan State University.
TESTING PROCEDURES
Six trials are reported here. The Central locations
for both the Conventional and the Roundup Ready trials include test sites
in Allegan, Ingham, Saginaw, and Sanilac Counties. The Southern locations for
both the Conventional and the Roundup Ready trials include test sites
in Hillsdale, Ingham, Lenawee and St. Joseph (irrigated) Counties.
Twenty-four seed companies entered a total of 198 commercial varieties, and
one public variety was entered.
The cooperators, planting dates, harvest dates, and other site details
for the seven locations are listed below.
Seed was planted in 6-row plots, 20 feet long with 15-inch row spacing,
at a depth of 1.5-inches. The planting rate was 180,000 seeds/acre. At
each location, varieties were replicated four times in a lattice design.
The plots were trimmed to a length of 14 feet and the center four rows
were harvested. Experimental design, data management, and data analysis
were conducted with AGROBASE Generation II, (Agronomix Software, Inc.,
Winnipeg, Canada).
TEST SITE INFORMATION
Lenawee County
Nearest city: Britton
Cooperator: David & Jason Woods
Planting date: 5-15-07
Harvest date: 10-9-07
Previous crop: Corn
Soil type: Brookston Clay Loam
Fertilizer: None
Herbicides: Conventional Trials – Preemerge .6 oz.
FirstRate 84DG, 1.33 pt/A Dual II Magnum
Roundup Ready Trials - 32 oz./A Roundup Ultra
Hillsdale County
Nearest city: Reading
Cooperator: Robert Lennard
Planting date: 5-7-07
Harvest date: 10-22-07
Previous crop: Corn
Soil type: Blount Silt Loam
Fertilizer: 200# /A 0-23-30
Herbicides: Conventional Trials – Preemerge
.6 oz.
FirstRate 84DG, 1.33 pt/A Dual II Magnum
Roundup Ready Trials - 32 oz./A Roundup Ultra
St. Joseph County - Irrigated
Nearest city: Mendon
Cooperator: Roger and Anne Gentz
Planting date: 5-14-07
Harvest date: 10-21-07
Previous crop: Seed Corn
Soil type: Elston Sandy Loam
Fertilizer: 150# /A 0-0-60; 40#/A 21-0-0-24
Herbicide: Conventional Trials – Preemerge 1.5#/A
Lorox 50% DF, 1.33 pt/A Dual II Magnum
Roundup Ready Trials - 32 oz./A Roundup Ultra
Ingham County
Nearest city: Dansville
Cooperator: Cremer Farms
Planting date: 5-21-07
Harvest date: 10-25-07
Previous crop: Corn
Soil type: Capac Loam
Fertilizer: 193#/A 9-23-30, 2% Mn
Herbicides: Conventional Trials – Preemerge .6oz.
FirstRate 84DG, 1.33 pt/A Dual II Magnum,
Roundup Ready Trials - 32 oz./A Roundup Ultra
Allegan County
Nearest city: Hopkins
Cooperator: Paul Puschel
Planting date: 5-19-07
Harvest date: 10-30-07
Previous crop: Corn
Soil type: Sebewa Loam
Fertilizer: 250# /A 0-0-60
Herbicides: Conventional Trials – Preemerge .06 oz.
FirstRate 84DG, 1.33 pt /A Dual II Magnum
Roundup Ready Trials - 32 oz./A Roundup Ultra
Saginaw County
Nearest city: Saginaw
Cooperator: Tom Hoff
Planting date: 5-12-07
Harvest date: 10-12-07
Previous crop: Corn
Soil type: Parkhill - Kilmanagh Loam
Fertilizer: None
Herbicides: Conventional Trials – Preemerge .6 oz.
FirstRate 84DG.
Roundup Ready Trials - 32 oz./A Roundup Ultra
Sanilac County
Nearest city: Sandusky
Cooperator: Gerstenberger Farms, Inc.
Planting date: 5-22-07
Harvest date: 10-8-07
Previous crop: Corn
Soil type: Parkhill Clay Loam
Fertilizer: 150# /A 12-13-11, 10% sulfer, 1% zinc
Herbicides: Conventional Trials - Preemerge 1.5#/A
Lorox 50% DF, 1.33 pt/A Dual II Magnum
Roundup Ready Trials - 32 oz./A Roundup Ultra
GROWING CONDITIONS
USING THE DATA
Results are presented in Tables 1 through 6.
Yield: Yield
is expressed as bushels per acre at 13% moisture and is reported as single
and across site means for 2005. Two and three year means are also presented
when applicable.
Maturity Date (MAT): The
reported values (month-date) represent the means (rounded to the nearest
day) of all reps at all sites. Entries were considered mature when 95%
of the pods had attained their final color and would crack under finger
pressure. Additional field drying was required before the plants were
ready to harvest.
Height: Plant
height, reported in inches, was measured at maturity from the soil surface
to the tip of the main stem. The reported values are means of all reps
at all sites.
Lodging: Lodging
scores reflect the erectness of the plants before harvest. The reported
values are means of all reps at all sites. Ratings are based on the following
scale:
1= Almost all plants erect.
2= All plants leaning slightly, or fewer than 25% of the plants down.
3= All plants leaning moderately (45%), or 25% to 50% of the plants down.
4= All plants leaning considerably, or 50% to 80% of the
plants down.
5= Almost all plants down.
Protein and Oil Content: Protein and oil content of the seed was determined using near-infrared reflectance and is expressed on a 13% moisture basis. The analysis was done on seed from a single replicate from the Ingham and Saginaw locations for the central trial and the Ingham and Lenawee locations for the southern trial.
Phytophthora Resistance:
Information on the presence of
phytophthora resistance genes was provided by the organizations entering
varieties. Varieties denoted with:
· 1a are resistant to phytophthora Races 1, 2, 10, 11, 13-20, 24,
26 & 27.
· 1b are resistant to Races 1, 3-9, 13, 15, 18, 21, & 22.
· 1c are resistant to Races 1-3, 6-11, 13-15, 17, 21, 23, 24 &
26.
· 1k are resistant to Races 1-11, 13-15, 17, 18, 20-24 & 26.
· 3 are resistant to Races 1-5, 8 and 9.
· 6 are resistant to Races 1-4, 10, 12, 14-16, 18-21 & 25.
· 7 are resistant to Races 12, 16, 18 & 19.
Soybean Cyst Nematode Resistance (SCN):
Seed Companies that screen varieties for SCN resistance have
indicated if the variety has known susceptibility or resistance
· R – Resistant
· MR – Moderately Resistant
· S – Susceptible
· MS – Moderately Susceptible
These notations followed by a number indicate the identified cyst nematode
race
SELECTING A VARIETY
LSD (least significant difference, found at the
bottom of each data column) values are useful when comparing two varieties
in the same table. If the difference between two varieties is less than
the LSD value, this difference is probably due to chance or minor environmental
differences. However, if the difference between two varieties is greater
than the LSD, there is a 95% or greater probability that the difference
in performance is due to the greater yield potential of one variety. Valid
comparisons can only be made between averages in the same column. The
C.V. (coefficient of variation, found at the bottom of each data column)
is indicative of the trial precision. Lower C.V. values indicate more
precise trials.
The primary consideration in selecting a variety is yield. When evaluating
a variety, consider yield performance over locations and across several
years, if available. Considerations other than yield are also important
in selecting a variety. It is especially important to select a variety
that will mature before the first frost in the fall.
The degree of lodging varies among varieties. Lodging ratings should be
used to evaluate potential harvest losses. Growers who have experienced
lodging in the past and have had harvest problems may want to select a
more lodging resistant variety. Alternatively, a variety susceptible to
lodging may be planted at a slightly lower population to increase standability.
Growers should note seed size when selecting planting rates. Planting
rates should be based on number of seeds per acre and not on pounds per
acre.
It often benefits growers to select a few good varieties for planting
each year. Yield determination and careful field evaluation during the
growing season will add to the grower's knowledge of variety performance
and allow for better selection.
SEED TREATMENT
Treated soybean seed submitted for
Michigan State University's Soybean Performance Trials are noted by abbreviation
in the 'TMT' column. Questions concerning treatments should be directed
to the seed company. Contact information can be found in the 'Directory
of Companies'.
Treatment
Code:
AM = Apron Maxx (Maxim)
AM-C = Apron Maxx & Cruiser
EN = Encase
SG = Soy Guard
SuG = SureGro
O = Optimize
T-AL =Trilex-AL
G = Gaucho
SPECIALTY SOYBEAN VARIETIES
Eleven special-use
varieties were tested in this year’s performance trials. This information
will help soybean growers compare the potential profitability of special-use
varieties to that of conventional varieties. DF Seeds DF222 Super2, Dairyland's DSR-218, Hyland's Sherwin and Vinton 81 are food-grade
varieties. Zeeland Farm Services ZFSelect 251 LS, ZFSelect 291 LS, ZFSelect 722 LS and ZFSelect 725 LS are low-saturated
fat soybean varieties that have been grown under contract for oil production.
Zeeland Farm Services ZFSelect 252 LL, ZFSelect 261 LL and ZFSelect 625 LL are low-linolenic acid soybeans.
Be sure
to contact your buyers to determine which special-use varieties they will
accept before signing contracts or ordering seed.