xt70rx938w3r https://exploreuk.uky.edu/dips/xt70rx938w3r/data/mets.xml   Kentucky Agricultural Experiment Station. 1969 journals 178 English Lexington : Agricultural Experiment Station, University of Kentucky Contact the Special Collections Research Center for information regarding rights and use of this collection. Kentucky Agricultural Experiment Station Progress report (Kentucky Agricultural Experiment Station) n.178 text Progress report (Kentucky Agricultural Experiment Station) n.178 1969 2014 true xt70rx938w3r section xt70rx938w3r A Results of the
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_ KENTUCKY SOYBEAN
‘ PERFORMANCE  
TESTS- 1968  
I J. F. SHANE, CHARLES TUTT, ‘
s s. H. PHILLIPS, J. w. H£RR0N,
and STUART BRABANT
U; ~(OF
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  PROGRESS REPORT 178
vg UNIVERSITY OF KENTUCKY
Acnncun.1·unA1. zxrznmmr surnow
DEPARTMENT OF AGRONOMY
Lexington

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RESULTS OF THE KENTUCKY SOYBEAN
I PERFORMANCE TESTS - 1968
s
The objective of the Kentucky Soybean Performance
Tests is to provide an estimate of the relative per-
·“ formance of standard soybean varieties and to provide
information on the performance of experimental strains
` of soybeans provided by the U.S. Regional Soybean
` Laboratory. Included in the testing program are herb- ’
icide tests, row-spacing tests and fertilizer tests.
' Soybean production in Kentucky for 1968 was esti-
mated at 12,3&9,000 bushels. Production in 1967 was
10,638,000 bushels and 7,750,000 bushels for 1966.
Average yield per acre was 26.5 bushels for 1968, down 5
. 1.5 bu from 1967. E
A EXPERIMENTAL METHODS .
• Soybean tests were conducted at five locations in
the major soybean-producing areas of the state and at
- Bowling Green and Lexington. The testing locations,
soil types, soil test results, pounds of N, P and K
° applied per acre, date planted and row width are shown
A on page 2. Varieties and experimental strains tests
were planted with each entry in three plots (replica-
tions) at all locations with individual plots being Q
- rows wide and 19 feet long. The seeding rate was 10
viable seed per foot of row. In the row—spacing test
the planting rates were 7, 8, and 10 viable seed per
. foot of row with rows spaced 20, 30, and 40 inches apart.
In a herbicide test conducted at Henderson the plot
. size was 4 rows 40 feet long.
The herbicide test at Henderson was planted May 22
_; and the herbicides were applied with a tractor mounted
boom sprayer. Chemicals were applied uniformly by
using a constant pressure at Q0 psi. All chemicals were
applied in water at the rate of 25 gal/A. Treflan was
applied as preplant treatment and double disked im ed-
iately into the soil.
3

 Yield
A l6-foot section from each of the 2 center rows Q p
was harvested for yield. Plants were cut by hand and
threshed with a small nursery thresher. The yield of
P the varieties is reported as bushels per acre at l3.0 c °
percent moisture.
Maturity Date
This is the date when the pods are dry and most of I
the leaves have dropped. Stems are also dry, under most
conditions. Maturity may also be expressed as days .
earlier (-) or later (+) than a standard variety. l
Lodging
Lodging was based on a scale of l to 5; l = almost
all plants erect; 2 = all plants over slightly or a
few down; 3 = all plants over moderately or 25%-50% down;
4 = all plants over considerably or 50%-80% down; 5 =
all plants down badly. f
_ Seed Quality 3
Quality was also based on a scale of l to 5: l =
very g00d;2 = good; 3 = fair; Q = poor; 5 = very poor.
Seed Size #
Seed size is expressed as the weight in grams of
l0O seed.
Purple Seed Stain
The amount of purple stain, a disease caused by
the fungus Cecospora kikuchii (T.Matsu and Tomoyaau)
Gardner, is expressed as the percentage of seed which
was stained. Development of the disease is apparently
influenced by weather conditions existing during pod
formation.
RESULTS *
Variety Trials
Performance data for the variety tests are pre-
sented in Tables l-l3. Tables l, 3, 5, 7, 9 and ll
are periods-of-year sum aries for Henderson, Hickman,
Murray, Princeton, Hopkinsville and Lexington. Tables
2, Q, 6, 8, l0 and l2 are annual summaries for the same
4

 _•-
respective locations. Bowling Green data is pre-
sented in Table 13. Shattering is scored 14 days
* after maturity on the border rows and is based on
estimates of the percent of open pods as follows:
1. No shattering
“ 2. 1% to 10% shattered
1 3. 10% to 25% shattered
4. 25% to 50% shattered
` 5. Over 50% shattered
Row-spacing and Fertilizer Experiments
i Yield data for the row—spacing test at Henderson
are presented in Tables 14 and 15. The 30 inch spacings
were higher yielding than the 20 inch or 40 inch spac- r
ings. Amsoy and Clark 63 were significantly higher
. yielding than Hood at all spacings. l
Yield data for Princeton are presented in Tables
, 16 and 17. In 1968 Hood was higher yielding than
Amsoy or Clark 63. For the 3 year period, 1966-1968,
. Clark 63 and Hood averages were 39.8 and 40.9 bushels
, per acre respectively.
In a fertilizer test at Henderson, finely ground
Q lime was applied at a rate of 2% tons per acre and
PZO5 and K20 at the rate of 200 pounds per acre.
Yields were: 0-0-0, 43.8 bushels per acre; 0-0-0 +
; Lime, 45.2 bushels; 0-200-200, 46.7 bushels; 0-200-200+
Lime, 47.5 bushels. No statistically significant
differences existed.
Date—of-Planting, Irrigation, and Variety Experiment
This experiment was conducted in 1967 and 1968 at
y Lexington. Very little moisture stress was observed
in either year. In 1967 yields from plantings made
4 April 28 and May 26 were significantly higher than
Q from the June 27 planting. Yields of irrigated plots
were significantly higher than non-irrigated plots
for the April 28 and June 27 planting. The Wayne
variety for the May 26 planting produced higher yields
on the non-irrigated plots.
5

 h
In 1968 the April 17 planting was significantly
higher in yield than the later plantings. The May 17
planting was significantly higher yielding than the g l
June 18 planting. Wayne produced higher yields on _
non-irrigated plots for all dates of planting and
Kent produced higher yields on irrigated plots. *
Data are presented in Tables 18 and 19. 7
Weed Control Experiment
Data for the weed control ratings for the herbi-
cide test at Henderson are presented in Tables 20 and
21. Ratings are given as the percent control for both 7 ,
grassy and broadleaf type weeds. The test was planted
May 22 and ratings taken on June 21, July 15, and at
harvest.
An area known to be heavily infested with most `
weeds, except johnson grass and wild cane, was selec-
ted for the test. Most treatments gave satisfactory §
control of grassy weeds.
Heavy rainfall early in the growing season may ’ A
have reduced full season control of weeds on some plots.
Beans from plots where good weed control was ob- W
tained were much easier to thresh than beans from plots
with no treatment or those with poor weed control.
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19

 Table 14. Two-year Summary of Soybean R0w—Spacing Test, y
Henderson, Ky. 1967-19 8 ,`
Bushels per Acre
Variety 20" Rows 30" Rows 40" Rows Average •
é
Amsoy 49.1 54.2 45.6 49.6
Clark 63 44.3 46.6 40.1 43.6 6
Hood 27.8 31.9 28.1 29.2
Average 40.4 44.2 37.9 40.8
-9 
Table 15. Annual Summary of Soybean Row-Spacing Test, {
Henderson, Ky. 1968
l Bushels Ber acre* •,
Variety 20" Rows 30" Rows 40" Rows Average .
Amsoy 45.9 50.7 42.9 46.5 a *
Clark 63 42.5 47.1 40.1 43.2 a A
Hood 30.9 40.5 31.3 34.2 b
·—————· · -t ·—————- -————i!
Average 39.8 b 46.1 a 38.1 b 41.3
a
 
* Yields followed by the same letter are not sifnifi-
cantly different for average or spacing. •_
4
s.
I
Q
20

 7 Table 16. Three—year Sum ary of Soybean Row-Spacing Test,
`* Princeton, Ky. 1966-1968
` Bushels per acre `
A3 Variety 2U" Rows 30" Rows AO" Rows Average
u
_ Amsoy 36.2 36.6 37.2 36.6
° Clark 63 40.1 39.8 39.5 39.8
g Hood QO.5 hl.6 40.6 QO.9
`° Average 38.9 39.2 39.1 39.1 Z
4
_ Table 17. Annual Summary of Soybean Row-Spacing Test,
’ Princeton, Ky. 1968
 
, Bushels per acre*
Variety 20" Rows 30" Rows AO" Rows Average
*: Amsoy 32.2 QO.2 3&.9 35.8 b
Clark 63 35.9 38.1 36.Q 36.8 b
Hood A1.1 &&.& @1.8 &2.& a
5 Average 36.Q b QO.9 a 37.7 b 38.3
(G * Yields followed by the same letter are not signifi-
‘; cantly different.
-5
. All
21

 ‘¤*
Table l8. Two-year Summary of Date—of-Planting, Irrigatiog
and Variety Experiment, Lexington, Ky. 1967-l9•:
Kent Wayne
Date Non- Non- *¢
Planted Irrigated Irrigated Irrigated Irrigated Ave
April 22 56.2 49.7 52.4 52.7 52.8§
May 22 48.9 50.0 47.8 5l.O 49.4;
M
June 22 43.2 37.8 36.8 35.2 38.2Q
Average 49.4 45.8 45.6 46.3 —-—}
. •v
Table l9. Annual Summary of Date-of—Planting, Irrigation,.
and Variety Experiment, Lexington, Ky. l968 !
Kent Wayne l
Date Non- Non- .
Planted Irrigated Irrigated Irrigated Irrigated Ave -
April l7 59.2 56.6 53.6 58.5 57.0.
May l7 53.9 5l.9 47.9 54.7 52.4bK
June 18 50.4 42.7 4l.l 43.0 44.3,
·rrr-··—······r——······—*——·—*··—··——·—··—····—·*··——·—···j
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