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. There were 67 conventional and 620 roundup resistant varieties from 65 seed companies tested in 2006. This total included 283 varieties entered as 'Producer Nominated' varieties, fees for the Producer Nominated varieties were paid by the Illinois Soybean Checkoff Board.
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 to try.


Selection of entries. Seed companies in Illinois and surrounding states were invited to enter soybean varieties, brands, or blends in the 2006 Illinois soybean performance trials. Entrants were required to enter all nonirrigated, 30-inch-row-width trials on a regional basis. To finance the testing program, a fee of $80 per location was charged for each variety entered by the seed company. Most of these varieties, brands, or blends are commercially available, but some experimental varieties were also entered. A total of 3,177 entries were tested in 2006.
Number and location of tests. In 2006, tests were conducted at 13 locations in the state (see map). These sites represent the major soils and maturity zones of the state.
Nonirrigated, 30-inch-row-width trials, conventional and roundup resistant, were conducted on a regional basis. The regions are as follows:

Region 1 Erie, Mt. Morris and DeKalb
Region 2 Monmouth, Goodfield and Dwight
Region 3 Perry, New Berlin and Urbana
Region 4 Brownstown and Belleville
Region 5 Elkville and Harrisburg
Seven-inch-row-width conventional and roundup resistant trials were conducted at Urbana.
Field plot design. Entries of each test were replicated three times in a randomized complete block or alpha lattice design. The 30-inch-row trial plots consisted of four rows, each 21 feet long. The center two rows of each plot were harvested to measure yield. The 7-inch-row trial plots consisted of eight rows, each 21 feet long. The center six rows were harvested to measure yield.
Fertility and weed control. All test locations were at a high level of fertility. Herbicides were used at all test locations for weed control. Weed control for the roundup resistant trials consisted of post-emergence applications of Roundup as needed, no pre-emergence herbicide was used. Plots were also weeded by hand if needed.
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 soybeans that may have been lost as a result of combining or shattering.
Soybean Cyst Nematode. Soil samples were taken from variety plots at each location in August and evaluated for cyst populations. Threshold numbers of cysts per 100cc of soil are as follows:

Low 1-5
Medium 6-25
High >25


Soybean yield was measured in bushels (60 pounds) per acre at a moisture content of 13 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:

1 - Almost all plants erect
2 - All plants leaning slightly or afew plants down
3 - All plants leaning moderately (45o), or 25 to 50 percent of the plants down
4 - All plants leaning considerably, or 50 to 80 percent of the plants down
5 - 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:

1 - No shattering
2 - 1 to 10% of pods open
3 - 10 to 25% of pods open
4 - 25 to 50% of pods open
5 - Over 50% 0f pods open

Shattering was not significant at any location.


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 out yields 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, plant height and shattering.
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 varieties are compared and the difference between them is greater than the tabulated L.S.D. value, the varieties are judged to be "significantly different."
The L.S.D. is a number expressed in bushels per acre and presented following the average yield for each location. An L.S.D. level of 25% is shown. Find the highest yielding soybean variety within the regional table or single location table of interest, subtract the 25% L.S.D. value 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 = 0.20 to 0.40, where is the Type I statistical error rate for comparisons between means that are really equal. Herein, a value of = 0.25 is used in computing the L.S.D. 25-percent level 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 varieties. Readers who compare varieties 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 varieties 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 variety A in one trial or row spacing and the performance of variety 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 16:95-99, 1976.


Location: Slaymaker Farm, Whiteside county, west of Rock Falls, northwestern Illinois.
Soil Type: Beaucoup silty clay loam.
Cooperator: Robert Slaymaker.
Planting Date: May 4.
Harvest Date: October 1.
Herbicide: Pre-Canopy XL, Dual. Post- FirstRate, Select.
Roundup trial: Post- Roundup, Select.
Tillage: fall chisel, spring field cultivate.
S.C.N.: high.
New Berlin
Location: Bennett Farm, Sangamon county, north of New Berlin, Central Illinois.
Cooperator: Leahy Bennett .
Soil type: Sable silty clay loam.
Planting date: May 7.
Harvest date: September 16 & October 2, 10.
Herbicide: Pre-Canopy XL, Dual, Post-Basagran, FirstRate, Select.
Roundup trial: Post- Roundup.
Tillage: fall V ripper, spring soil finisher.
S.C.N. medium.
Mt. Morris
Location: Nelson Farm, Ogle county, North of Mt. Morris, north central Illinois.
Cooperator: Rick Nelson.
Soil type: Muscatine silt loam.
Planting Date: May 7.
Harvest Date: October 9.
Herbicide: Pre-Canopy XL, Dual. Post-FirstRate, Select.
Roundup Trial: Post- Roundup.
Tillage: fall chisel, spring field cultivate.
S.C.N.: low.
Location: University of Illinois, Crop Sciences Research & Education Center, Champaign County, east central Illinois.
Soil type: Flanagan silt loam.
Cooperators: Robert Dunker, farm manager; Mike Kleiss, farm foreman.
Planting dates: May 10.
Harvest date: September 21, 22, October 7, 10.
Herbicide: Pre-Canopy XL, Dual, Post-FirstRate, Select.
Roundup trial: Post- Roundup.
Tillage: fall chisel, spring soil finisher.
S.C.N.: medium.
Location: University of Illinois, Northern Illinois Agronomy Research Center, DeKalb County, southwest of DeKalb.
Soil type: Flanagan silt loam.
Cooperators: Lyle Paul, research director; Dave Lindgren, farm foreman.
Planting date: May 6.
Harvest dates: October 9.
Herbicide: Pre-Canopy XL, Dual.
Roundup trial: Post- Roundup.
Tillage: fall plow, spring mulch finisher.
S.C.N.: high.
Location: University of Illinois, Brownstown Agronomy Research Center, Fayette County, south central Illinois.
Soil type: Cisne silt loam.
Cooperator: Lindell Deal, field worker.
Planting date: May 22.
Harvest dates: October 4, 5.
Herbicide: Pre- Canopy XL & Dual.
Roundup trial: Post- Roundup.
Tillage: spring disk,combination tillage tool.
S.C.N.: low.
Location: University of Illinois, Northwestern Illinois Agricultural Research and Demonstration Center, Warren County, northwest of Monmouth.
Soil type: Sable silty clay loam.
Cooperators: Eric Adee, agronomist; Martin Johnson, farm foreman.
Planting date: May 5.
Harvest date: September 20 & October 2.
Herbicide: Pre-Canopy XL, Dual. Post- First Rate, Fusion, Array.
Roundup trial: Post- Roundup.
Tillage: fall chisel, spring field cultivate.
S.C.N.: medium.
Location: Southern Illinois University Research Center, east of Belleville, St. Clair County.
Soil type: Ebbert silt loam.
Cooperators: Dr. Ed Varsa, research director; Ron Krausz, field manager.
Planting date: May 23. Harvest date: Oct. 5, 6.
Herbicide: PPI- Dual II magnum, Scepter, Authority. Post- Flexstar, Select.
Roundup trial: Post- Roundup.
Tillage: spring disk, field cultivate, cultimulch.
S.C.N.: low.
Location: Wurmnest Farm, Woodford county, north of Goodfield, central Illinois.
Cooperator: Mike Wurmnest.
Soil Type: Ipava silt loam.
Planting date: May 10.
Harvest date: September 26 & October 6.
Herbicide: Pre-CanopyXL, Dual. Post-FirstRate, Select.
Roundup trial: Post- Roundup.
Tillage: fall chisel, spring soil finisher.
S.C.N. medium.
Location: Funk farm, North of Carbondale, Jackson County, extreme southern Illinois.
Soil type: Okaw silt loam.
Cooperator: Trent Funk.
Planting date: May 9.
Harvest dates: September 27 & October 4, 14.
Herbicide: Pre- Canopy XL, Dual. Post-FirstRate, Select.
Roundup trial: Post- Roundup.
Tillage: spring disk, soil finisher.
S.C.N.: medium.
Location: Grundy County, Hoffman Farm.
Soil type: Reddick silty clay loam.
Cooperator: Allen Hoffman.
Planting date: May 6.
Harvest dates: September 29,30 & October 10.
Herbicide: Pre- Canopy XL, Dual, Post- Basagran, FirstRate, Select.
Roundup trial : Post- Roundup.
Tillage: fall deep rip, spring soil finisher.
S.C.N.: medium.
Location: Wintizer farm, Saline County, extreme southern Illinois.
Soil type: Harco silt loam/Patton silty clay loam.
Cooperator: Kevin Wintizer.
Planting date: May 22.
Harvest dates: October 4, 13.
Herbicide: Pre- Canopy XL,- Dual. Post-FirstRate, Select.
Roundup trial: Post- Roundup.
Tillage: fall chisel , spring field cultivate.
S.C.N.: low.
Location: Pike County, Fencik Farm, west central Illinois.
Soil type: Herrick silt loam
Cooperator: Mike Vose, farm foreman.
Planting date: May 5.
Harvest dates: September 21 & October 3.
Herbicide: Pre-Canopy XL, Dual, Post-FirstRate, Poast Plus.
Roundup trial: Post- Roundup.
Tillage: spring field cultivate, Dyna drive.
S.C.N.: low.


May June July August September Total
Mt. Morris
New Berlin





Atlas, Mycogen Seeds, 9330 Zionsville Rd. Indianapolis, IN 46268 (800-692-6436)
AgAlumni, Ag Alumni Seed, 702 State Rd. 28 E, Romney IN 47981 (800-822-7134)
AgSource, AgSource Seeds Inc., 1800 L Ave, Nevada, IA 50201 (515-382-8880)
AgVenture, AgVenture Seeds, 1763 E 200 N Rd, Hoopeston, IL 60942 (800-375-4335)
Asgrow, Monsanto, 800 N Lindbergh Blvd. St. Louis, MO 63167 (800-335-2676)
Baker, Baker Seed Co., 610 W. Seminary St. West Salem, IL 62476 (618-456-8851)
Beck's, Beck's Superior Hybrids, 6767 E 276th St. Atlanta, IN 46031 (317-984-3508)
Bergmann-Taylor,Bergmann-Taylor, Inc., 10073 Ellis Rd. St. Jacob, IL 62281 (618-644-5522)
Bio Gene, Bio Gene Seeds, 5477 Tri-County Hwy. Sardinia, OH 45171 (937-444-6422)
Crow`s, Crow's Hybrid Corn Co., 612 E Dunlap St. Kentland, IN 47951 (800-369-8218)
Dairyland, Dairyland Seed Co. Inc., PO Box 958, 3570 Hwy H, West Bend, WI 53095 (800-236-0163)
DeKalb, Monsanto, 800 N Lindbergh Blvd. St. Louis, MO 63167 (800-335-2676)
Delta King, Delta King Seed Co., PO Box 970, McCrory, AR 72101 (870-731-2992)
Delta & Pine Land, Delta & Pine Land, 1301 E 50th St, Lubbock, TX 79404 (806-740-1600)
DeRaedt, DeRaedt Seed Corp., 10 N 971 Tower Rd. Hampshire, IL 60140 (847-464-5553)
Diener, Diener Seeds, Inc., 371 N Diener Rd. Reynolds, IN 47980 (800-545-8611)
Dyna-Gro, United Agri Products-Dyna-Gro Seed, 1267 W Washington, Pittsfield, IL 62363 (217-285-4461)
Excel, Agrinetics Inc., PO Box 151, Naperville, IL 60563 (630-355-1054)
Excel, Excel Brand, 116 E State, Camp Point, IL 62320 (800-969-6717)
Excel, Hartke Seed Farms, 22679 Sunset Rd. Litchfield, IL 62056 (217-324-2680)
Excel, Miller Bros Frm & Frt,2001 Niemansville Trail, Walshville, IL 62091 (217-456-9311)
Farm Advantage, Farm Advantage, 1275 Hwy 69, Belmond IA 50421 (641-444-3344)
Fontanelle, Fontanelle Hybrids, 10981 8th St. Fontanelle, NE 68044 (402-721-1410)
FS Hisoy, Growmark Inc., 1701 Towanda Ave, Bloomington, IL 61701 (888-222-4405)
Garst, Garst Seed Co., 2369 330th St. PO Box 500, Slater, IA 50244 (515-685-5000)
Gateway, Gateway Seed Co., 5517 Van Buren Rd. Nashville, IL 62263 (618-327-8000)
Great Heart, Great Heart Seed, 220 W Washington, Paris, IL 61944 (217-465-4132)
Great Lakes, Great Lakes Hybrids, 9915 W M-21, Ovid, MI 48866 (800-257-7333)
Gutwein, Golden Harvest Seeds Inc., PO Box 248, Pekin, IL 61555 (800-747-2127)
Helena, Helena Chemical Co., 11711 N Pennsylvania St. Suite 270, Carmel, IN 46032 (317-815-6370)
Hoblit, Hoblit Seed Co., PO Box 487, Atlanta, IL 61723 (217-648-2392)
Hoffman, Hoffman Seed House Inc., 200 E 4th Street, Hoffman, IL 62250 (618-495-2617)
Horizon, Horizon Genetics, PO Box 31, Mason City, IL 62664 (800-533-2879)
Hughes, Hughes Seed Farm, 206 N Hughes Rd, Woodstock, IL 60098 (815-338-2480)
Illinois Pride, Illinois Foundation Seeds Inc., 1083 County Rd. 900 N Tolono, IL 61880 (217-485-6260)
IPAP, in care of Alliance Production, 1009 N John St. Farmer City, IL 61842 (309-928-3123)
Kaltenberg, Kaltenberg Seeds, 5506 State Rd. 19 PO Box 278, Waunakee, WI 53597-0278 (608-849-5021)
Kitchen, Kitchen Seed Company Inc., PO Box 286, Arthur, IL 61911 (217-543-3476)
Kruger, Kruger Seed Co., Hwy 20 East PO Box A Dike, IA 50624 (800-772-2721)
Lewis, Lewis Hybrids, PO Box 38 Ursa, IL 62376 (217-964-2131)
LG Seeds, LG Seeds, 22827 Shissler Rd. Elmwood, IL 61529 (309-742-2211)
Martin, Martin Seeds, Inc., 10045 W 2nd St. Williamsport, IN 47993 (765-986-2030)
Mavrick, Bo-Jac Seed Co., 245 1500th Avenue. Mt. Pulaski, IL 62548 (217-792-5001)
M&D Seed, M&D Seed, 8982 Ford Rd. Kinmundy, IL 62854 (618-547-3404)
Merschman, Merschman Seeds Inc., 103 Ave D, West Point, IA 52656 (800-848-7333)
Midland, Brown Seed Enterprises, Inc., 289 Co Rd 550 N. Neoga, IL 62447 (217-895-2335)
Midwest Seed Gen, Midwest Seed Genetics, 23751 Hwy 30 East, Carroll, IA 51401 (800-369-8218)
Moweaqua, Moweaqua Seed Co., 600 East Main Moweaqua, IL 62550 (217-768-4513)
Munson, Munson Hybrids Inc, 1262 Knox Road 100 E. Galesburg, IL 61401 (309-343-8410)
MWS, MWS Seeds LLC, 2737 N 700 East Rd. Ashkum, IL, 60911 (815-698-2204)
NC+, NC+ Hybrids Inc., 3820 N 56th St. Lincoln, NE 68504-0408 (800-279-7999)
NK Brand, NK, 7500 Olson Memorial Hwy. Golden Valley, MN 55427 (800-445-0956)
NU-AG, NU-AG Seed, PO Box 345, Tuscola, IL 61953 (217-253-4066)
Pioneer, Pioneer Hi-Bred Int'l, 14171 Carole Dr, Bloomington, IL 61704 (309-821-9940)
Public Varieties, Illinois Foundation Seeds Inc., 1083 County Rd 900 N. Tolono, IL 61880 (217-485-6260)
Quality Plus, Quality Plus Seed Co., 562 State Hwy 164, Monmouth, IL 61462 (309-734-5764)
Renk, Renk Seed, 6809 Wilburn Rd. Sun Prairie, WI 53590 (608-837-7351)
Roeschley, Roeschley Hybrids, 8222 E 1500 N Rd. Graymont, IL 61743 (815-743-5938)
Schillinger, Schillinger Seeds Inc., 4200 Corporate Drive, Suite 106, West Des Moines, IA 50266 (515-225-1166)
Shepherd, Shepherd Seed, 2636 E Stateline Rd. Beloit, WI 53511 (608-353-6552)
Sieben, Sieben Hybrids Inc., 1441 Gorman Drive, Geneseo, IL 61254 (309-944-5131)
Southern Cross, Miles Seed, PO Box 22879, Owensboro, KY 42304 (800-666-4537)
Southern States, Southern States Coop, PO Box 26234, Richmond, VA 23260 (804-281-1203)
Steyer, Steyer Seed, 6154 N Co Rd 33, Tiffin, OH 44883 (800-231-4274)
Stine, Stine Seed Co., 2225 Laredo Trail Adel, IA 50003 (515-677-2605)
Stone, Stone Seed Co., 5965 W State Rt 97, Pleasant Plains, IL 62677 (217-546-8006)
Trelay, Trelay Seed Co., 11623 Hwy 80, Livingston, WI 53554 (608-943-6363)
Trisler, Trisler Seed Farms Inc., 3274 E 800 North Rd. Fairmount, IL 61841 (217-288-9301)
Vigoro, Royster-Clark Inc., 717 Robinson Road SE, Washington CH, OH 43160 (800-659-7790)
Wilken, Wilken Seed Grains Inc., RR 4 PO Box 770, Pontiac, IL 61764 (815-844-3458)
Willcross, Willcross Hybrids LLC., PO Box 560, Garden City, MO 64747 (877-862-6326)