1995 General Information, Seed Sources, Weather Tables, and Map
The University of Illinois commercial soybean testing program
was started in 1969 as a result of requests by seedsmen that their private
varieties be tested. The number of seed companies participating in 1995
The purpose of this commercial soybean testing program is to provide
unbiased, objective, and accurate testing of all varieties entered. The
tests are conducted on as uniform a soil as is available in the testing
area. Small plots are used to reduce the chance of soil and climatic variations
occurring between one variety plot and another.
The results of these tests should help you judge the merits of varieties
in comparison with other private and public varieties. Because your soils
and management may differ from those of the test location, you may wish
to plant variety strips of the higher-performing varieties on your farm.
The results printed in this circular should help you decide which varieties
Selection of entries: Selection of entries. Soybean producers
in Illinois and surrounding states were invited to enter varieties, brands,
or blends in the 1995 Illinois soybean performance trials. Entrants were required
to enter all nonirrigated, 30-inch-row-width trials on a regional basis (entry
in a minimum of two locations required). To help finance the testing program,
a fee of $65 per location was charged for each entry entered by the seed producer.
Most of these varieties, brands, or blends are commercially available, but some
experimental varieties were also entered. A total of 2,120 entries were tested
Number and location of tests: In 1995, tests were conducted
at 9 locations in the state. These sites represent the major soils and maturity
zones of the state.
Nonirrigated, 30-inch-row-width trials were conducted on a regional basis.
The regions are as follows:
- Region I - DeKalb and Dwight
- Region II - Monmouth and Urbana
- Region III - Monmouth and Perry
- Region IV - Urbana and Perry
- Region V - Brownstown and Belleville
- Region VI - Carbondale and Dixon Springs
Seven-inch-row-width trials were conducted at Urbana.
Fertility and weed control: All test locations were at a high
level of fertility. Herbicides were used at all test locations for weed control.
All plots were also weeded by hand. Method of planting and harvesting. The 30-inch-row
variety trials were planted with a modified bean planter. A custom-built, cone
type, narrow-row drill was used to plant the 7-inch trials. Harvesting was done
with a small-plot combine. No allowances were made for beans that may have been
lost as a result of combining or shattering.
Method of planting and harvesting
The 30-inch-row variety trials were planted with a modified bean planter. A
custom-built, cone type, narrow-row drill was used to plant the 7-inch trials.
Harvesting was done with a small-plot combine. No allowances were made for beans
that may have been lost as a result of combining or shattering.
Soybean Cyst Nematode: Soil samples were taken from each
location and evaluated for cyst populations by the U. of Illinois Dept. of Crop
Sciences Plant Clinic.
Yield: Soybean yield was measured in bushels (60 pounds) per
acre at a moisture content of 12.5 percent. An electronic moisture monitor was
used on the combine for all moisture readings.
Maturity: Maturity was stated as the date when approximately 95 percent
of the pods were ripe.
Lodging: The amount of lodging was rated at harvest time.
The following scale was used:
- Almost all plants erect
- All plants leaning slightly or a few plants down
- All plants leaning moderately (45°), or 25 to 50 percent of the plants
- All plants leaning considerably, or 50 to 80 percent of the plants down
- Almost all plants down
Height: Height was measured shortly before harvest as the average length
of plants from the ground to the tip of the main stem.
Shattering: The percentage of open pods was estimated at harvest time.
The following scale was used:
- No shattering
- 1 to 10% of pods open
- 10 to 25% of pods open
- 25 to 50% of pods open
- Over 50% of pods open
SUGGESTIONS FOR COMPARING ENTRIES
It is impossible to obtain an exact measure of performance when conducting
any test of plant material. Harvesting efficiency may vary, soils may not be
uniform, and many other conditions may produce variability. Results of repeated
tests are more reliable than those of a single year or a single-strip test.
When one variety consistently outyields another at several test locations and
over several years of testing, the chances are good that this difference is
real and should be considered in selecting a variety. However, yield is not
the only indicator. You should also consider maturity, lodging, and germination.
As an aid in comparing soybean varieties, brands, and blends within a single
trial, certain statistical tests have been devised. One of these tests, the
least significant difference (L.S.D.), when used in the manner suggested by
Carmer and Swanson1 is quite simple to apply and is more appropriate than most
other tests. When two entries are compared and the difference between them is
greater than the tabulated L.S.D. value, the entries are judged to be "significantly
The L.S.D. is a number expressed in bushels per acre and presented following
the average yield for each maturity group within each location. L.S.D.'s of
10% and 30% are shown, if the 10% L.S.D. is used, decisions made are true 9
out of 10 years, the 30% L.S.D. will be true 7 out of 10 years. The 30% L.S.D.
is a smaller number and will include fewer varieties in the 'top group'. Decide
the L.S.D. level that is best for your farm and find the highest yielding soybean
variety within the maturity group and location, subtract the chosen L.S.D. level
from the highest yielding variety, every variety with a greater yield than the
resulting number is 'statistically the same' as the highest yielding variety.
Consider the merits of the varieties in this group when making varietal selections.
In a study of the frequencies of occurrence of three types of statistical errors
and their relative seriousness, Carmer2 found strong arguments for an optimal
significance level in the range alpha = 0.20 to 0.40, where alpha is the Type
I statistical error rate for comparisons between means that are really equal.
Herein, values of alpha = 0.10 and 0.30 are used in computing the L.S.D. 10-
and 30-percent levels shown in the tables.
To make the best use of the information presented in this circular and to avoid
any misunderstanding or misrepresentation of it, the reader should consider
an additional caution about comparing entries. Readers who compare entries in
different trials or row spacings should be extremely careful, because no statistical
tests are presented for that purpose. Readers should note that the difference
between a single entry's performance at one location or row spacing and its
performance at another is caused primarily by environmental effects and random
variability. Furthermore, the difference between the performance of entry A
in one trial or row spacing and the performance of entry B in another trial
or row spacing is the result not only of environmental effects and random variability,
but of genetic effects as well.
1Carmer, S.G. and M.R. Swanson. "An Evaluation of Ten Pairwise
Multiple Comparison Procedures by Monte Carlo Methods." Journal of American
Statistical Association 68:66-74. 1973.
2Carmer, S.G. "Optimal Significance Levels for Application
of the Least Significant Difference in Crop Performance Trials." Crop Science
1995 TEST FIELDS
- Location: University of Illinois, Northern Illinois Research Center, southwest
- Soil type: Flanagan silt loam (dark brown, adequately drained, highly fertile).
- Cooperators: Dave Lindgren, farm foreman; Lyle Paul, research director.
- Planting date: May 22.
- Harvest dates: October 4
- Herbicide: Post- Pursuit & C.O.C.
- Tillage: fall plow, spring mulch finisher.
- S.C.N.: none.
- Location: Livingston County.
- Soil type: Elliott silty clay loam.
- Cooperator: Larry Zabel.
- Planting date: May 31.
- Harvest dates: September 19 & 25.
- Herbicide: Pre- Pursuit & Dual; Post- Poast II.
- Tlillage: fall chisel, spring field cult.
- S.C.N.: none.
- Location: University of Illinois, Northwestern Illinois Agricultural Research
and Demonstration Center, northwest of Monmouth.
- Soil type: Muscatine silt loam.
- Cooperators: Eric Adee, agronomist; Roland Caulkins, farm foreman.
- Planting date: May 1 & 2.
- Harvest dates: September 26 & October 3
- Herbicide: PPI- Pursuit & Dual; Post- Basagran, Fusilade & COC
- Tillage: fall chisel, spring disk & field cult
- S.C.N.: low.
- Location: University of Illinois Agronomy South Farm, Champaign County,
east central Illinois.
- Soil type: Flanagan silt loam (dark brown, adequately drained).
- Cooperators: R.E. Dunker, farm manager; Mike Plotner, farm foreman.
- Planting dates: June 3
- Harvest dates: September 27, 29 and October 1,2.
- Herbicide: PPI- Dual & Sencor.
- Tillage: fall chisel, spring disk & field cult
- S.C.N.: none.
- Location: Orr Research Center, near Perry, Pike County, south central Illinois.
- Soil type: Muscatine silt loam (moderately poorly drained).
- Cooperators: Glenn Raines, research director; Mike Vose, farm foreman.
- Planting date: June 7.
- Harvest dates: September 28 & October 10.
- Herbicide: PPI- Squadron.
- Tillage: fall none, spring disk & dyna-drive.
- S.C.N.: none.
- Location: University of Illinois Brownstown Experimental Field, Fayette
County, south central Illinois.
- Soil type: Cisne silt loam (poorly drained, gray prairie with a well-developed
- Cooperators: Kevin Barber, Sr. Res. Spec.; Jim Carter, farm foreman.
- Planting date: June 9.
- Harvest dates: October 5 & 13.
- Herbicide: Post- Fusion & Galaxy
- Tillage: fall none, spring disk & field cult.
- S.C.N.: low.
- Location: Southern Illinois University Research Center, east of Belleville,
St. Clair County.
- Soil type: Ebbert silt loam.
- Cooperators: Ron Krausz, researcher; George Kapusta, research director.
- Planting date: June 14 & 17.
- Harvest date: October 6.
- Herbicide: PPI- Triscept.
- Tillage: fall none, spring field cultivator.
- S.C.N.: Grp 3 - medium, Grp 4 - high.
- Location: Southern Illinois University Agronomy Research Center, at Carbondale,
extreme southern Illinois.
- Soil type: Weir silt loam (shallow, silty loam over claypan).
- Cooperators: Paul Pinnon, field manager; George Kapusta, agronomist.
- Planting date: June 5.
- Harvest dates: October 11 & 25.
- Herbicide: Grammoxone & Squadron, Post- Storm.
- Tillage: No-till.
- S.C.N.: medium.
- Location: University of Illinois Dixon Springs Agricultural Center, Pope
County, extreme southern Illinois.
- Soil type: Belknap silt loam (light-colored, moderately well-drained, medium-textured
- Cooperators: Steve Ebelhar, research director; Ron Hines, research specialist.
- Planting date: May 30.
- Harvest dates: October 12.
- Herbicide: Pre- Squadron, Post- Tornado & COC.
- Tillage: fall chisel, spring disk
- S.C.N.: none.
1995 GROWING SEASON RAINFALL
SOURCES OF SEED
- Adler, Adler Seeds, Inc., 6085 W 550 N, Sharpsville, IN 46068
- Ag-Plus, Ag-plus Seed, R.R. 1, Box 73, Carlock, IL 61725
- AgraTech, AgraTech Seeds, Inc., 5559 N. 500 W., McCordsville, IN 46055
Agrinetics, Agrinetics, Inc., P.O. Box 51, Naperville, IL 60566
- Agripro, Agripro Seed, Inc., R.R, 2, Hwy 30 East, Ames, IA 50010
- Asgrow, Asgrow Seed Co., 2605 East Kilgore, Kalamazoo, MI 49002
- Baird, Baird Seed Farm, 1122 Knox Hwy 18, Williamsfield, IL 61489
- Beck's,Beck's Superior Hybirds, 6767 East 276 St., Atlanta, IN 46031
- Belleville, Belleville Seed House, Inc., 3400 S. Illinois St., Belleville,
- Bergmann-Taylor, Bergmann-Taylor, Inc., P. O. Box 317, St. Jacob, IL 62281
- Brown, Brown Seed Enterprises, R.R. 1, P.O. Box 358 A, Neoga, IL 62447
- Callahan, Callahan Seeds, 1122 East 169 St., Box 367, Westfield, IN 46074
- Ciba Seeds, Ciba Seeds, 211 Landmark Dr., Suite D-4, Normal, IL 6176
- Cole, Cole Grower Service, 537 Atlas Ave., Madison, WI 53714
- Crow's, Crow's Hybrid Corn Co., P.O. Box 306, Milford,IL 60953
- Dairyland, Dairyland Seed Co., Inc., P.O. Box 958, 3570 Hwy. H, West Bend,
- DeKalb, DeKalb Genetics Corporation, 3100 Sycamore Road, DeKalb, IL 60115
- DeRaedt, DeRaedt Seed Co., 10N971 Tower Rd., Hampshire, IL 60140
- Freedom, Freedom Seed Co., U.S. Rte. 24 East, Astoria, IL 61501
- Golden Harvest, Golden Seed Co., 27420 137th Ave. N., Cordova, IL 61242
- Golden Harvest, Sommer Bros. Seed Co., P.O. Box 248, Pekin, IL 61555
- Good Buddy, Good Buddy Seeds, P.O. Box 306, Mt. Orab, OH 45154
- Great Heart, Great Heart Seed Co., 220 W. Washington, Paris, IL 61944
- Great Lakes, Great Lakes Hybrids Inc., 9915 W. M-21, Ovid, MI 48866
- Griffith, Griffith Seeds Co., P.O. Box 38, McNabb, IL 61335
- Growmark, Growmark Inc., 1701 Towanda Ave., Bloomington, IL 61701
- Gutwein, Gutwein Seeds, R.R. 1, Box 40, Francesville, IN 47946
- Harms, Harms Seed Farms, R.R. 2, P.O. Box 74, Colfax, IL 61728
- Heartland, Heartland Agriculture, L.L.C, 838 North East 1000 Rd. Calhoun,
- Henkel, Henkel Seeds, 107 Cedar Grove, Mendota, IL 61342
- Hoblit, Hoblit Seed Co., P.O. Box 487, Atlanta, IL 61723
- I.C.I., I.C.I. Seeds, 6945 Vista Drive, West Des Moines, IA 50266
- Interstate/Payco, Interstate/Payco Seed Co., P.O. Box 338, West Fargo,
- J.G. Limited, J.G. Limited, Box M, Plymouth, IN 46563
- KSC/Challenger, KSC/Challenger, Hwy 20 East, Dike, IA 50624
- Kaltenberg, Kaltenberg Seed Farms, 5506 State Rd. 19, P.O. Box 278, Waunakee,
- Kitchen, Kitchen Seed Co., Inc., P.O. Box 286, Arthur, IL 61911
- Kruger, Kruger Seed, P.O. Box A, Dike, IA 50624 LG Seeds, LG Seeds Inc.,
North Wyckles Rd., P.O. Box 950, Decatur, IL 62525
- LaPrairie-Chatton, LaPrairie-Chatton Elevator Inc., P.O. 20, CLayton, IL
- Latham, Latham Seed CO., 131 180 St., Alexander, IA 50420
- Lewis, Lewis Hybrids, Inc., P.O. Box 38, Ursa, IL 62376
- Lynks, Lynks Seeds, P.O. Box 637, Marshalltown, IA 50158
- Martin, Martin Seeds, Inc., 10045 West Second St., Williamsport, IN 47993
- Merschman, Merschman Seeds, 103 Ave. D, West Point, IA 52656-0067
- Midwest, Midwest Seed Genetics, 213 East Sixth St., P.O. Box 518, Carroll,
- Miles, Miles Seed, 2760 Keller Rd., Owensboro, KY 42301
- Muirhead, Muirhead Farms, 42W814 Rohrsen Rd., Plato Center, IL 60170
- Mycogen, Mycogen Plant Sciences, 720 St. Croix St., Prescott, WI 54021
- Northrup King, Northrup King Co., 1607 Visa Drive, Suite 3B, Normal, IL
- Pioneer, Pioneer Hi-Bred International, Inc., P.O. Box 1536, O'Fallon,
- Prairie Heritage, Prairie Heritage Seeds, 1612 Reynolds Dr., Charleston,
- Prairie Stream, Prairie Stream Farms, Inc., 2175 E. Kelley Rd., Frankfort,
- Profiseed, Profiseed, Inc. 1691 Hwy 65 North, Hampton, IA 50441
- Public Varieties, Illinois Foundation Seeds, Inc., P. O. Box 722, Champaign,
- Randell, Randel Seeds, P.O. Box 85, Ceder, IA 52543
- Ridgway, Ridgway Seed Co., P.O. Box 212, Ridgway, IL 62979
- Roeschley, Roeschley Hybrids, 8222E 1500N, Graymont, IL 61743
- Rolling Meadows, Rolling Meadows, Inc., 2206 Fort St., Denison, IA 51442
- Schults, Schults Seed Co., P.O. Box 211, Deterich, IL 62424
- Scott,s, Scott's Quality Seeds, 1701 Notrh Broadway, Mt. Pleasant, IA 52641
- Sieben, Sieben Hybrids, Inc., 633 N. College, Geneseo, IL 61254
- Southern States, Southern States Coop., P.O. Box 26234, Richmond, VA 23260
- Stewart, Stewart Hybrids, 2507 Mendell Rd., Princeville, IL 61559
- Stine, Stine Seed Co., 2225 Laredo Trail, Adel, IA 50003
- Stone, Stone Seed Farms, Inc., R.R. 2, Pleasant Plains, IL 62677
- Sun-Ag, Sun-Ag Seed, P.O. Box 227, El Paso, IL 61738
- Sunstar, Sunstar Hybrids, 14993 State Rd. 17, Culver, IN 46511
- Terra, Terra International, Inc., 600 4th St., P.O. Box 6000, Sioux City,
- Tri-County Stockdale, Tri-County Stockdale, 25512 Black Rd., Joliet, IL
- Trisler, Trisler Seed Farms, Inc., 3274 E. 800 N., Fairmount, IL 61841
- Twin States, Twin States Seed Co. Inc., P.O. Box 428, Hoopeston, IL 60942
- Whata, Whata Hybrid, 8908 West Sabin Church Rd., Pearl City, IL 61062
- Wildy Seed, Wildy Seed Inc., 7718 Wildy Rd, New Athens, IL 62264
- Wilken, Wilken Seed Grains, Inc., R.R. 4, P.O. Box 770, Pontiac, IL 61764