K. M. Day
Senior Research Agronomist
W.P. Lorton, Technician
Dr. E. P. Christmas
Professor of Agronomy
Department of Agronomy
Agricultural Research Programs
Purdue University
West Lafayette, Indiana
(Copyright 1998 Purdue Research Foundation)
TABLE OF CONTENTS
Introduction
Performance Trial Methodology
Location of Trials
Methods Used in the Trials
State-wide Weather and Harvest Summary
Discussion
Sources of Seed
Soybean Performance
Tables
Acknowledgements
Special thanks for desktop publishing to Carol Summers,
assistance on the web page to Cindy Boone and Jim Wills,
and for computer programming to Philip Hess,
Department of Agronomy.
Soybeans are evaluated annually at several locations in Indiana. These
trials are conducted according to the policies and procedures of the Indiana Agricultural
Research Programs at Purdue University. In this bulletin, results of the 1998 performance
trials are given as well as multiple year averages for those entries tested in the past
three test years. Data for experimental entries are not included.
This information is presented under authority granted Indiana Agricultural Research
Programs to conduct performance trials, including interpretation of data to the public,
and does not imply endorsement or recommendation by Purdue University. Also any soybean
not included in this bulletin does not imply criticism by Purdue University. This bulletin
is protected by copyright by the Purdue Research Foundation. Permission is granted to
reproduce the tables only in their entirety provided that this bulletin, "Performance
of Public and Private Soybeans in Indiana", is referenced and the data are not
edited, manipulated or reinterpreted. The table number, title, heading and footnotes 1 and
2 must be included. Permission is also granted to reproduce a maturity-group sub-table
provided that the complete table heading and footnotes are included with the sub-table. A
conspicuous disclaimer which states "endorsement or recommendation by Purdue
University is not implied" must accompany any information reproduced from this
bulletin.
This bulletin can be accessed electronically from the Purdue University
home page. The address is:
www.agry.purdue.edu/agronomy/
Additional bulletin copies are available from:
Agricultural Media
Distribution Center
301 South 2nd Street
Lafayette, Indiana 47901-1232
Telephone: 765-494-6795
FAX: 765-496-1540
Performance results for both private and public entries are presented.
Certified seed was used for seeding the public varieties. Private entries, entered
voluntarily by the owner, were accepted in the trial after meeting requirements for
eligibility and payment of a testing fee. No verification has been made that the seed or
the quality of the seed entered in this trial is the same as that offered for sale to the
public.
Plans and rules for entering this trial are available, upon request, to anyone at any
time. Persons wishing to enter the soybean performance trial should contact the author by
February 1.
K. M. Day
Vartest Building
Agronomy Research Center
4540 U.S. 52 West
West Lafayette, IN 47906
Telephone: 765-583-1406
No FAX Number Available
Performance Trial Methodology
Location of Trials
This section contains information on locations and procedures
used in conducting the trials.
In 1998 trials were planted at five locations (see Figure 1). The locations, numbered from
north to south are:
Figure 1. Performance Trial Locations.
Location 1. Porter County at the Pinney-Purdue Agricultural Center near Wanatah, on
Runneymede loam, a dark gray depressional soil underlain by sandy substrata.
Location 2. Tippecanoe County at the Purdue University Agronomy Research Center
near Lafayette, on Chalmers silty clay loam, a very dark gray or black, poorly drained
depressional soil.
Location 3. Randolph County at the Davis-Purdue Agricultural Center near
Farmland, on Blount silty clay loam, a dark grayish-brown, somewhat poorly drained soil.
Location 4. Daviess County on the Tom Boyd farm near Washington, on Iva silt loam,
a grayish brown, nearly level, somewhat poorly drained soil, formed in deep loess.
Location 5. Jennings County at the Southeast-Purdue Agricultural Center near
Butlerville, on Avonburg silt loam, a light grayish, nearly level, somewhat poorly drained
soil, with fragipan in the sub-soil.
Methods Used in the Trials
In 1998, the trials for conventional soybeans in
maturity groups II, III and IV were grouped by maturity, and planted in the respective
early or late maturity group at each location . High-germinating seed (usually 90 percent
or better) was used in the trial. The soybean plots were planted in a randomized complete
block design with four replications at each location. Anticipated maturity differences
between adjacent plots were restricted to 10 days or less.
Soybeans entered in the Roundup ReadyŽ, cyst nematode, no-till, or double crop trials
were not divided by maturity group, however anticipated maturity differences, between
adjacent plots, were also restricted to 10 days or less. Roundup ReadyŽ is a trademark of
Monsanto Company.
Planting Equipment Used in the Trials. Three different planters were used to
establish the trials reported in this bulletin. These different planters (and plant
populations), and the procedures used to calculate estimated bushels-per-acre yields, have
an impact on the trial results. Statistically valid yield comparisons may be made within
the trials conducted using any of these planters, and practical comparisons may be made
among the trials planted with the same equipment. Comparisons made between trials
conducted using these different planters could lead to incorrect conclusions.
A John Deere 7100 Max-Emerge planter was modified and configured to plant 4 rows
with 20-inch row spacing, and is equipped with cone distributors, which dropped a
pre-counted number of seeds in each 33 linear feet of row. The John Deere planter
was used to plant conventional soybeans in the maturity group II, III and IV trials at
locations 1, 2, 3, and 4. For trials planted using the John Deere planter, the
planting rate for proprietary entries, selected by the owner, varied from 5 to 8 viable
seeds per linear foot of row, with most ranging from 5 to 7. Most public varieties were
planted at the rate of 6 viable seeds per linear foot of row (approximately 70 pounds or
157,000 viable seeds per acre).
The Almaco Grain Drill was designed and custom built for research plot work. The
drill is equipped with 10 John Deere openers set on 7.5 inch row spacing, and is equipped
with spring-loaded press wheels. The drill dropped a pre-counted number of seeds in each
33 linear feet of row. The planting rate for proprietary entries, selected by the owner,
varied from 3.0 to 4.0 live seeds per linear foot of row. Public entries were seeded at
the rate of 3.0 live seeds per linear foot of row, which would be 209,088 live seeds per
acre. Assuming 90 percent emergence, this should produce a stand of 188,179 plants per
acre. The Almaco planter was used to plant the following trials; location 2: the
Roundup ReadyŽ (conventional tillage) trial; location 5: the maturity group III and
maturity group IV trials, and the Roundup ReadyŽ (conventional tillage) trial.
The Great Plains No-Till Drill is equipped with 11 openers set on 7.5 inch row
spacing. The drill is equipped with a belt cone distributor which dropped a pre-counted
number of seeds equivalent to 200,000 seeds per acre. Unless otherwise stated, (for the
tillage trials), germination was assumed to be 90 percent for all of the entries. The
target population was 165,000 plants per acre assuming that 90 percent of the viable seed
emerged. The cyst nematode trial at location 2, and the no-till, and double crop trials,
at location 5, were conducted by Dr. E. P. Christmas and were planted with this Great
Plains No-Till drill.
When comparing the bushels-per-acre yield estimates between the 4 row, 20-inch row
spaced trials (John Deere Max-Emerge planter) vs. the solid-seeded trials (Almaco or Great
Plains drills), keep in mind that the plot width calculations, for the John Deere 20
inch row plots, are different from the solid seeded plots, and may affect the
estimated yield level by as much as 10 to 11 percent. Example: at location 2,
when comparing yield differences between the Roundup ReadyŽ soybean trial (solid-seeded
trial), with conventional soybeans in the maturity group II and III trials (4-20 inch
rows), yield differences could be due to, a) the plot area calculations, which determined
the estimated bushels-per-acre yield, and b) to the Roundup ReadyŽ soybeans being in a
more favorable plot location.
At location 5, the conventional soybean maturity group III and maturity group IV trials,
and the Round up ReadyŽ, (conventional tillage) trial were all solid-seeded, using the
same planting and harvesting equipment, similar seeding rates, and the same (plot area)
calculations for all three trials. Although it is not statistically valid to compare the
data between these three trials at location 5, these data are better suited for practical
comparisons among the trials, than comparing data among the trials at location 2.
Conventional farm equipment was used for seedbed preparation. All conventional soybean
plots were treated with herbicides and, when possible, cultivated. Hand weeding was used
to remove weeds that emerged late in the season.
At location 2, the Roundup ReadyŽ trial was conducted using conventional tillage, (fall
moldboard plowed, and spring disked and field cultivated). At location 5, the Roundup
ReadyŽ trial, using conventional tillage, was spring chiseled and field cultivated, and
the Roundup ReadyŽ No-Till trial was planted in standing cornstalks. All of the Roundup
ReadyŽ trials were sprayed once with Roundup UltraŽ just prior to canopy closure, and
season long weed control was adequate.
Plots in all of the trials were end trimmed prior to harvest, and all rows were harvested
for yield. This year all of the trials reported in this bulletin were harvested with an
Almaco combine. The combine is equipped with a modified John Deere 900 series head with a
floating cutter bar.
For all the conventional soybeans in the maturity-grouped trials, (planted with the John
Deere Max-Emerge planter, 4 rows with 20 inch row spacing),. plot width was calculated as
7.5 feet from plot center to plot center. This includes the maturity group II, III and IV
trials at locations 1, 2, 3, and 4.
The solid-seeded trials, (planted using the Almaco Drill, with 10 rows on 7.5 inch
spacing), were calculated as 75 inches wide. This includes the Roundup ReadyŽ
(conventional tillage) trials at locations 2 and 5; and the maturity group III and IV
(conventional tillage) trials, at location 5.
The solid-seeded trials, performed by Dr. E. P. Christmas using the Great Plains
No-Till drill, were eleven drill rows wide with 7.5 inch row spacing, or 82.5 inches wide.
This drill was used at location 2, for the cyst nematode trial (in conventional tillage);
and at location 5, for the no-till trials for the conventional and Roundup ReadyŽ
soybeans, and for the double crop trial.
Observations such as plant height, lodging and maturity were taken from the center rows.
All plots in the trials reported in this bulletin, were harvested with an Almaco combine,
and plot grain yields were weighed, and moisture tested automatically, on the combine,
using a Seed Spector II and a Psion HC 110. The Seed Spector II equipment was calibrated
using a Motomco moisture meter and Chantillon scales, and the calibrations were checked
throughout the harvest season. It should be pointed out that this equipment is not the
same as equipment used to meet official sampling standards, but is believed to be suitable
for field plot work. All yields were adjusted to 13 percent moisture and are reported as
bushels per acre.
Plant height, taken at maturity, is the average length (to the nearest inch) from
the soil surface to the tip of the main stem.
Lodging is rated at maturity according to the following scores:
1 Almost all plants erect.
2 All plants leaning slightly or a few plants down.
3 All plants leaning moderately (45 degrees) or 25-50 percent of plants
down but still harvestable with conventional equipment.
4 All plants leaning considerably or 50-80 percent of plants down and
difficult to harvest with conventional equipment.
5 Almost all of the plants down, and harvest losses would occur with
conventional equipment.
Maturity date is when more than 90 percent of the pods are ripe (brown); and days
(to maturity) are the number of days from planting to maturity. Delayed leaf drop and
green stems are not considered when assigning maturity. About a week of good drying
weather may be needed before soybeans are ready to combine after reaching maturity.
Soybeans should mature about two weeks before the average date of the first killing frost,
which ranges from approximately October 10 in northern Indiana to October 25 in southern
Indiana.
Statewide Weather and Harvest Summary
The spring of 1998 was generally wet and soybean planting got off to a slow start. At
the first of May, only 3 percent of the crop was planted compared to 20 percent for 1997,
and 6 percent for average. By mid-May, planting was only 21 percent complete, compared to
51 percent for 1997. During the last half of May, weather conditions permitted soybean
planting to proceed at a rapid pace. At the end of May, the crop was 69 percent planted,
which was behind the 86 percent planted in 1997, but 10 percent ahead of average.
Planting continued in June in the north and central parts of the state, and by mid-June
the crop was 91 percent planted in the north; 84 percent in central Indiana, but only 50
percent planted in the south. By the end of June, soybean planting was virtually complete
in northern and central Indiana, but only 63 percent completed in the south. This means
that soybeans which normally would have been planted in late April or very early May, were
now being planted at the same time as double crop soybeans.
At the beginning of July some areas in southern Indiana were still too wet for soybean
planting. Else where in the state, 9 percent of the soybeans were blooming. In early July
the crop condition for soybeans was rated 10 percent excellent, 51 percent good, 28
percent fair, 7 percent poor and 4 percent very poor. During the third week of July,
severe storms brought heavy rain (amounts of up to 8 inches in some areas) to Indiana.
Crops utilized the abundant moisture to develop rapidly, and soybean crop condition
ratings were better at the end of July than they were at the beginning of the month.
Although most of the state had adequate to surplus moisture, crops were under stress from
dry weather in the northern portions of the state
During the first half of August, crop conditions continued to improve. Plenty of sunshine
and moisture, combined with very little disease or insect pressure, permitted the crop to
make excellent progress. At the end of the second week of August, 74 percent of the
soybean crop was rated good to excellent. At the beginning of the fourth week of August,
crop conditions declined for the first time since mid-July. Although the crop was still in
good condition, dry soil was stressing the crop in many areas of the state. The decline
continued as the crop developed and matured rapidly.
By mid-September, harvest was underway, with 3 percent of the crop harvested; 1 percent
is average for that date, and the crop was rated 62 percent good to excellent. By the end
of September, 92 percent of the crop was shedding leaves, and 20 percent of the crop was
harvested.
Soybean harvest continued at a rapid pace in early October, and the first crop report for
October, reported 45 percent of the crop harvested. By the end of the month, soybeans were
89 percent harvested and that is about normal for the end of October.
The last crop report for the 1998 growing season, reported soybeans to be 98 percent
harvested, which was only slightly ahead of the 5 year average.
In summary, northern Indiana soil conditions were dry for much of the growing season.
Central Indiana had adequate to surplus moisture early in the season and was generally dry
in late August. The southern part of the state had disastrous wet weather until July. In
some areas of southern Indiana, it was virtually impossible to plant the crop in a timely
manner, but once established, the soybeans produced good yields.
Summer temperatures were generally mild with temperatures seldom reaching 90° F or above
for extended periods of time. For much of the state, the warmest weather came the last
week of June. Southwestern Indiana had the highest overall summer temperatures. Specific
rainfall amounts and temperatures are reported in the following section
"Discussion". The latter part of the growing season was generally favorable for
crop production and harvesting.
On November 20, 1998 the Indiana Crop and Livestock Reporting Service reported:
"Indiana soybean production is forecast at a record high 235.2 million bushels,
unchanged from the October forecast, but 2 percent above last year's production of 230.6
million bushels. The expected yield of 42 bushels per acre is unchanged from last month's
forecast, but 1.5 bushels below last year's yield of 43.5 bushels per acre. The 5.6
million acres for harvest is 6 percent above last year's level but unchanged from
October."
It is not possible to absolutely determine or predict the
response of plants to the environment. The results of every field trial conducted are
influenced by the treatment and by the experimental error. In these trials, the treatment
is the soybean entry (variety, brand, or blend) planted in the trial. Experimental error
is a composite term to indicate everything that could not be controlled by the person
performing the trial. It is not intended to include human error. These trials are
conducted on the assumption that all the entries in the trial are equal until evidence is
obtained that they are not equal. In order to obtain this evidence it is necessary to
determine whether the trial results were influenced most by the entries or by experimental
error. To do this an analysis of variance is performed and the relationship of the
yielding ability of the entries to experimental error is determined. The analysis of
soybean performance trials show that maturity relationships are very predictable whereas
yield relationships are the most difficult to predict.
Probability levels have been established to assess the validity of the trial. Generally
trials should be significant at the 10 percent probability level. This means 1 trial in 10
could be a fluke and not be detected. In this bulletin, all of the 1998 trials are
significant at the 10 percent probability level, except for the maturity group III trial
at location 3, and the Roundup ReadyŽ (in conventional tillage) trial at location 5.
The analysis of variance makes it possible to compute a coefficient of variability (C.V.).
The coefficient of variability is a relative term. It is the ratio of the standard
deviation to the grand mean of the trial, expressed as a percent. On the western side of
Indiana a normal C.V. for soybeans is 5 to 10 percent; whereas on the eastern side it is
10 to 15 percent. Whenever the C.V. is larger than normal for a trial location it
indicates the precision of the trial was below normal. When yields are high and the
experimental error is small, the C.V. will be small.
Single-year trials, in this report, generally require yield differences of 7 to 10 bushels
for significance. This year, 1998, BLSD (k=100) yield differences for significance, ranged
from 4.0 to 21.8 with an average of 10.3 bushels, yield difference, required for
significance. In most cases, 1998, BLSD (k=100) values exceeding 10.0 bushels, were from
trials which were subject to extremely wet weather.
A test of significance must be performed to determine if the yield difference between
two entries is due to experimental error or due to the yielding ability of the entries.
The single-year trial only reflects what happened in one year at one location and is
generally inadequate for predicting how the soybeans may perform in the future. Data from
multiple years, and in some instances multiple locations, when combined and analyzed,
provide a superior estimate of how soybeans will perform in the future.
Generally a minimum of three years of testing are needed from a trial location to obtain
adequate data for predicting performance.
An analysis of variance, which includes years, will show that years have a very strong
influence on yields. Also, an analysis of variance which includes locations will show that
locations also influence the performance of the entries in the trial.
Brief periods of favorable or unfavorable weather, when the plants are vulnerable to
weather stress, can change the yield relationship among entries from year to year.
Maturity relationships are photoperiod influenced and are much less affected by weather
from year to year.
Often it is not beneficial or appropriate to combine data across locations from these
performance trials. The trials are far enough apart from north to south that the entries
in the trial may not be adapted to both locations. The trial environments from east to
west are also very different, especially in regard to the presence and severity of
Phytophthora rot. It is important to realize that locations may all provide similar trial
results one year and produce quite different results the following year.
This year, 1998, data combinations were made for the maturity group II trials at locations
1 and 2, for three, two and one year trials.
Data combinations were made for the maturity group III trials for three and two years, at
locations 1, 2, and 5; and for one year at locations 1, 2, 4, and 5. Results of the
maturity group IV trials are combined for locations 4 and 5, for three, two and one year
trials.
Results of the Roundup ReadyŽ (conventional tillage) trials from locations 2 and 5, are
combined for two and one year averages. Results for all the combined years and
locations are presented in Tables 22, 23, 24 and 25.
Soybean data from any source must include years (preferably three), must be analyzed,
and must have a test of significance before it has any value as a basis for performance
prediction.
Trial results are ranked by yield. The Waller-Duncan Bayesian k ratio t test is used for
the test of significance. A k ratio of 100:1 was used in computing the Bayesian least
significant difference (BLSD) for the test of significance. This ratio may be considered
in a loose sense to take the place of the 5% level of significance. The BLSD value may be
used to make all possible pair-wise comparisons among the entries. Yield differences
smaller than the BLSD value should be considered due to chance (experimental error) and
not due to superior performance.
An asterisk (*) is included in the yield column in each sub-table. The asterisk denotes
all yields in the sub-table which are not, statistically, significantly different from the
top yield. Do not place undue emphasis on yield differences followed by an asterisk. The
BLSD value must still be used to determine if the particular yields being compared are
significantly different.
At Location 1, weather was the driest of any trial location reported in this
bulletin. April rain totaled 4.81 inches, May 2.42, June 4.89, July 4.16, August 2.67, and
September 1.29 inches. Temperatures were generally mild, with only 18 days from May
through September reaching 90° F or above. The trials were planted and harvested in a
timely manner, and all entries were mature before the first killing frost. Compared to
previous years, the performance in both the maturity group II and III trials are normal,
except for maturity dates which were earlier than normal. Both tests are representative of
1998 growing conditions in northwestern Indiana and should be useful in making yield
comparisons.
At Location 2, moisture was adequate to abundant at the beginning of the growing
season and then became very dry after mid-season. April rain totaled 4.12 inches, May
5.93, June 8.41, July 5.26, August 1.37, and September 0.89 inches. Temperatures were
generally mild during the growing season, with only 19 days reaching 90° F or above from
May through September. The maturity group II and III, and the Roundup ReadyŽ
(conventional tillage) trials were planted and harvested in a timely manner.
Compared to previous years, the maturity group II and III test results, for yield, are
near normal and maturity dates earlier than normal. The maturity group II test was
affected, in June, to a small extent by excessive rainfall. The maturity group III test
was damaged by standing water to the extent that 29 plots were lost. These plots were
considered missing plots and the Yates' Iterative procedure was used to calculate the
missing data.
The Roundup ReadyŽ trial was planted on what proved to be the best plot site when
flooding rains arrived in June. No Roundup ReadyŽ plots were visibly damaged by ponding
water. Compared to the 1997 trial results, the 1998 Roundup ReadyŽ trial produced similar
yield results, with earlier maturity dates. A cautionary statement is made under the
section, "Methods Used in the Trials" on page 5. It is probably misleading to
compare data from either the maturity group II or III trials with data from the Roundup
ReadyŽ trial, as explained on page 5. As a case in point, both DSR 293/RR and Callahan
8297RR, have higher yields in the Roundup ReadyŽ trial than in the maturity group II
trial. This could be due to excessive water in the maturity group II test, but it is more
likely to be due to the difference in the size of the land area used to calculate the
estimated bushels per acre yield for the respective trials.
The difference in land area calculation is because the conventional soybeans, in maturity
groups II and III were planted in 4 row plots with 20 inch row spacing and were
calculated, plot center to plot center, as 7.5 feet wide. The Roundup ReadyŽ soybean
trial was solid seeded using 10 rows with 7.5 inch row spacing and the plot width was
calculated as 75 inches wide.
At location 2, Dr. E. P. Christmas planted the cyst nematode trial, but lost the first
planting to flooding. As soon as field conditions were operable, the plot area was
cultivated and the trial was replanted on the same plot area. The replanting was on June
26, 1998, and satisfactory stands were obtained for most of the plots. All of the entries
were mature before the first hard freeze. Yields were not particularly impressive and
unless other data are available to compare with this cyst nematode trial, no definite
conclusions should be drawn until more testing is performed.
At Location 3, moisture was abundant during the first part of the growing
season. April rain was 5.24 inches, May 2.62, June 6.48, July 6.34, August 3.72, and
September 2.04 inches. Summer was generally mild, with only 17 days of 90° F or higher
temperatures. Yields were similar to previous years in both the maturity group II and III
trials. Maturity dates were about a week earlier than normal. Precision in both of the
trials was disappointing, with the maturity group III test not being significant at the 10
percent probability level. The trials may be representative of the 1998 growing season in
east central Indiana, but are of limited value as a basis for prediction. Data
combinations across years, and other trial locations, as presented in Tables 22 and 23,
may offer better data.
At Location 4, weather data came from the Vincennes weather station, which is about
20 miles from the plot area. This makes the weather data, especially rainfall, less
representative of the plot area than weather data for the other plot locations. 1998 will
be remembered for the disastrous wet weather which plagued southern Indiana during the
planting season. April rain totaled 9.68 inches, May 6.51, June 5.79, July 7.0, August
2.33, and September 0.72 inches. Southern Indiana temperatures were much warmer than in
the northern and central parts of the state. From May through September, temperatures of
90° F or higher were recorded on 41 days. Many of these high temperatures occurred on
several consecutive days. During May and early June the high temperatures did not last
over a day or two. Then during the last week of June, temperatures reached or exceeded
90° F for 7 consecutive days. In July, 4 consecutive days were 90° F or above, and
during the last 16 days of August, 10 days recorded temperatures of 90° F or above.
Temperatures moderated and then high temperatures returned at the end of the first week of
September. October temperatures moderated and fluctuated between 60° F and 80° F until
the soybeans were mature. All plants were mature before the first killing freeze.
Weather data for 1998 for location 4 is particularly important because of the delay in
establishing the trials. In this program, these trials are the latest ever planted.
Planted on July 2, 1998, they were planted the same time as double crop soybeans. Yields
were remarkably good, and the precision in the trials was very good. Maturity dates were
later than usual due to the 6 to 8 week delay in planting. The trial results may be
representative of conditions in southwestern Indiana in 1998, but should be used in
comparison with data from normal production years.
At Location 5, disastrous wet weather plagued the trials planted May 19,
1998, in conventional tillage seedbeds, (maturity groups III and IV, and Roundup ReadyŽ).
Wet soil delayed planting the no-till trials for about a month to 6 weeks later than
normal. The no-till plots were planted June 30, 1998, by Dr. E. P. Christmas. Conditions
were favorable for planting the double crop soybean trial following wheat harvest, and the
trial was planted by Dr. Christmas, on July 9, 1998.
April precipitation totaled 9.95 inches, May 3.70, June 9.33, July 6.45, August 2.73, and
September 1.07 inches. Southeastern Indiana, from May through September, was much cooler
than the western side of the state. Only 11 days were recorded as having temperatures of
90° F or higher. These warm days generally occurred only a few days at a time; May had 1
day, the last week in June had 5 days, July and August 1 day each, and September, 3 days.
All of the plants matured before the first killing freeze.
Compared to previous years' trials, the maturity group III and IV trials, conducted using
conventional tillage, produced higher yields and matured earlier than normal. These trials
were affected by the heavy rainfall and, to some extent, by residual herbicides. Both
trials recovered from the early season stress, and may be considered representative of
growing conditions in southeastern Indiana in 1998. When used for yield comparisons, check
the 1998 results with the multiple year data.
Conventional maturity group III and IV soybeans were combined in a no-till seedbed trial,
and as previously mentioned, planting was delayed until June 30, 1998. For the past 3
years, planting the no-till trials at location 5 has been delayed, due to wet soil.
Therefore, the multiple year, and the 1998 data, are all from late-seeded trials. Yields
were similar to previous years, maturity dates earlier, and precision less. Entries have
probably not reached their genetic potential in these no-till trials.
The Roundup ReadyŽ trial, conducted with conventional tillage, was damaged by water and
although impressive yields were obtained, the precision of the test was not significant at
the 10 percent probability level.
At location 5, conventional soybeans in maturity groups III and IV (in conventional
tillage) and the Roundup ReadyŽ trial (in conventional tillage), were all planted the
same day, with the same equipment, and plot area calculations are the same for all three
tests. Statistically valid comparisons can only be made within each separate test, but
practical observations may be made about the overall performance of the entries.
The Roundup ReadyŽ trial (conducted in the no-till seedbed) was not planted until June
30, 1998, 42 days after the Roundup ReadyŽ trial (in conventional tillage) was planted.
The no-till trial produced overall lower yields, and matured later than entries in the
conventional tillage trial. However, precision in the no-till trial was good. Entries in
the no-till trial escaped most of the early season wet weather stress, but probably were
disadvantaged by late planting.
The 1998 double crop trial produced lower yields than the 1997 trial. Both trials were
planted about the same date, and in both years, double crop soybeans produced good yields.
The trial results are representative of southeastern Indiana during the last two years and
should be useful in making performance comparisons. The results should be reproducible in
production fields in years when moisture is adequate to establish and maintain the crop.
SOURCES OF SEED
Information concerning certified seed may be obtained from the Indiana Crop Improvement
Association, which certifies seed from both public and private sources. Publicly developed
varieties, presented in this bulletin, are listed under the Indiana Crop Improvement
Association, and the Ohio Seed Improvement Association addresses. Private companies have
requested that inquiries concerning proprietary entries, presented in this bulletin, be
directed to the addresses listed on the following pages..
Small case letters preceding the entry name are, v-variety, m-mixture (blend), and
b-brand. Other names, associated with the entry name, are brand or company names usually
associated, in the trade, with the entry name.
Agricultural Alumni Seed
Improvement Association, Inc.
702 SR 28 East, P.O. Box 158
Romney, Indiana 47981
Telephone: 765-538-3145
800-822-7134
b Strike 2880RR
b Strike 3080RR
b Strike 3580RR
b Strike 3670RR
b Strike 3880RR
b Strike 3980RR
AgraTech Seeds, Inc.
5559 North 500 West
McCordsville, Indiana 46055
Telephone: 317-335-3333
b AgraTech AT 274
b AgraTech AT 333
b AgraTech AT 350
b AgraTech AT 396
b AgraTech AT 425
Beck's Superior Hybrids, Inc.
6767 East 276th Street
Atlanta, Indiana 46031
Telephone: 317-984-3508
b Beck 281
b Beck 289
b Beck 290RR
b Beck 302RR
b Beck 334
b Beck 342
b Beck 351
b Beck 360RR
b Beck 370RR
b Beck 386
b Beck 388A
b Beck 390RR
b Beck 395
b Beck 419
b Beck 437STS
b Beck 440RR
Callahan Seeds
1122 East 169th Street, Box 367
Westfield, Indiana 46074-0367
Telephone: 317-896-5551
b Callahan 6330
b Callahan 7317
b Callahan 7383
b Callahan 8268RR
b Callahan 8275
b Callahan 8297RR
b Callahan 8348
b Callahan 8367RR
b Callahan 8394RR
b Callahan 8437RR
Land O' Lakes
950 North Meridian
Indianapolis, Indiana 46204
Telephone: 317-972-3000
v Countrymark 297
v Countrymark HS3971
v Countrymark HS4426
v Countrymark HT2383
v Countrymark HT322
v Countrymark RT2875
v Countrymark RT306
v Countrymark RT3585
v Countrymark RT446
Dairyland Seed Company, Inc.
P. O. Box 958, 3570 Highway H
West Bend, Wisconsin 53095
Telephone: 414-338-0163
v DSR-246/STS
v DSR-250/STS
v DSR-277
v DSR-293/RR
v DSR-300
v DSR-314/STS
v DSR-321/RR
v DSR-325
v DSR-338/STS
v DSR-351/RR
v DSR-370/STS
v DSR-372/RR
v DSR-381/RR
v DSR-400/STS
v DSR-418
v DSR-421/RR
Davis Seed Farms, Inc.
10184 Ted Davis Road
Greens Fork, Indiana 47345-9753
Telephone: 765-886-5148
b Davis D315
b Davis D327
b Davis D351
DEKALB Genetics Corporation
3100 Sycamore Road
DeKalb, Illinois 60115-9600
Telephone: 815-758-3461
v CX235C DeKalb
v CX253 DeKalb
v CX277 DeKalb
v CX284C DeKalb
v CX289 DeKalb
v CX295 DeKalb
v CX302C DeKalb
v CX348 DeKalb
v CX351 DeKalb
v CX367CRR DeKalb
v CX375 DeKalb
v CX377 DeKalb
v CX390RR DeKalb
v CX393C DeKalb
v CX399 DeKalb
v CX400 DeKalb
v CX419RR DeKalb
v CX444CRR DeKalb
v CX450C DeKalb
v CX470C DeKalb
v CX494
DeKalb
v CX496C DeKalb
Diener Brothers, Inc.
371 North Diener Road
Reynolds, Indiana 47980
Telephone: 219-984-5837
b Diener DB 269
b Diener DB 2761R
b Diener DB 280C
b Diener DB 289
b Diener DB 2900CR
b Diener DB 304
b Diener DB 3120R
b Diener DB 329C
b Diener DB 336
b Diener DB 3400
b Diener DB 352
b Diener DB 359C
b Diener DB 377
b Diener DB 3850CR
b Diener DB 3920R
b Diener DB 404C
b Diener DB 4100R
b Diener DB 442C
b Diener DB XV939S
Garst Seed Company
502 East Kent Street
Kentland, Indiana 47951
Telephone: 219-474-5111
b D265 Garst
b D308 Garst
b D398 Garst
Glick (Lynn and Myron) Seeds
15120 East Baseline Road
Columbus, Indiana 47203
Telephone: 812-579-6924
b L&M Glick 388
b L&M Glick 480
b L&M Glick 9359RR
b L&M Glick 936N
b L&M Glick 9381RR
b L&M Glick 9395NRR
Golden Harvest Seeds, Inc.
18356 Route 9, P.O. Box 248
Pekin, Illinois 61555-0248
Telephone: 309-346-2127
v Gold. Harv. H-1282
v Gold. Harv. H-1310
v Gold. Harv. H-1316
v Gold. Harv. H-1322
v Gold. Harv. H-1325
v Gold. Harv. H-1337
v Gold. Harv. H-1353
v Gold. Harv. H-1365
v Gold. Harv. H-1383
v Gold. Harv. H-1386
v Gold. Harv. H-1397
v Gold. Harv. H-1403
v Gold. Harv. H-1357RR
v Gold. Harv. H-1392RR
Indiana Crop Improvement Association
3510 US 52 South
Lafayette, Indiana 47905
Telephone: 317-474-3494
v Archer
Public
v Athow
Public
v Burlison Public
v Chapman Public
v Edison Public
v Flyer
Public
v Harper 87 Public
v IA 3005 Public
v Ina
Public
v Jack
Public
v Kenwood 94 Public
v Omaha
Public
v Pella 86 Public
v Probst
Public
v Resnik
Public
v Savoy
Public
v Thorne
Public
v Tiffin
Public
v Williams 82 Public
v Yale
Public
LaPorte County Seed
P. O. Box 66
Kingsbury, Indiana 46345
Telephone: 219-393-5581
b LP 261
b LP 282
b LP 331
b LP 333
LG Seeds, Windfall Service Center
P. O. Box 457
Windfall, Indiana 46076
Telephone: 800-428-7333
v LG 6285RR
v LG 6288
v LG 6293RR
v LG 6345RR
v LG 6376
v LG 6395
v LG 6399CRR
v LG 6432RR
v LG 6437C
Martin Seeds, Inc.
10045 West Second Street
Williamsport, Indiana 47933
Telephone: 765-986-2030
b M-9439
b M-9728
b M-9733
b M-9928
b M-9929
b M-9932
b M-Resister
Miles Seed Company
P.O. Box 22879, 2760 Keller Road
Owensboro, Kentucky 42304-2879_
Telephone: 800-666-4537
v David Miles Seed
v Exodus Miles Seed
v Jude Miles Seed
v Micah Miles Seed
v Paul Miles Seed
Ohio Seed Improvement Association
6150 Avery Road Box 477
Dublin, Ohio 43017-0477
Telephone: 614-889-1136
v Defiance Public
v Flint Public
v General Public
v Sandusky Public
Parke Seeds, Inc.
P. O. Box 221
Marshall, Indiana 47859
Telephone: 765-597-2233
b Parke 3097
b SunStar 3850
b SunStar 3890
b SunStar 3891
Pioneer Hi-Bred International, Inc.
P. O. Box 308
Tipton, Indiana 46072-0308
Telephone: 800-258-3579
v Pioneer var. 9452
v Pioneer var. 92B71
v Pioneer var. 92B91
v Pioneer var. 9306
v Pioneer var. 93B34
v Pioneer var. 93B45
v Pioneer var. 93B51
v Pioneer var. 93B53
v Pioneer var. 93B82
v Pioneer var. 9492
v Pioneer var. 94B01
v Pioneer var. 94B41
Rupp Seeds, Inc.
17919 County Road B
Wauseon, Ohio 43567
Telephone: 419-337-1841
v Rupp RS 2454RR
v Rupp RS 2499
v Rupp RS 4343RR
Schultz, J. M., Seed Company
105 North Pine Street Box 211
Dieterich, Illinois 62424
Telephone: 217-925-5210
v Schultz 3650NRR
v Schultz 3950NRR
v Schultz 4415N
v Schultz 4420RR
v Schultz 4794
Seed Consultants, Inc.
P.O. Box 96, 9768 Mill-Jeff Road
Jeffersonville, Ohio 43128
Telephone: 614-426-8644
b SC 385 Seed Cnslts
b SC 406 Seed Cnslts
b SC9388RR Seed Cnslts
b SC9398RR Seed Cnslts
Terra Industries, Inc.
600 Fourth Street P.O.Box 6000
Sioux City, Iowa 51102-6000
Telephone: 712-233-3609
b TS 248
Terra
b TS 258
Terra
b TS 277
Terra
b TS 317
Terra
b TS 325
Terra
b TS 348
Terra
b TS 356RR Terra
b TS 359STS Terra
b TS 364T Terra
b TS 388STS Terra
b TS 394
Terra
b TS 396RR Terra
b TS 415
Terra
b TS 466RR Terra
b TS 474
Terra
Trisler Seed Farms, Inc.
3274 East 800 North
Fairmount, Illinois 61841
Telephone: 217-288-9301
v Trisoy 2770
v Trisoy 2887RR
v Trisoy 3252
v Trisoy 3277RR
v Trisoy 3381
v Trisoy 3777RR
UAP/Richter
SR 421 South, P. O. Box 126
Yeoman, Indiana 47997
Telephone: 219-965-2271
b 3282 Dyna-Gro
b 3303RR Dyna-Gro
b 3304 Dyna-Gro
b 3331N Dyna-Gro
b 3368RR Dyna-Gro
b 3395 Dyna-Gro