2001
Colorado Soybean Variety Performance ResultsGrowing
interest in the production of soybeans in Colorado gave rise to soybean variety
testing on a statewide basis in 2001. Colorado State University began this testing effort to provide unbiased
and reliable variety information to Colorado soybean producers to help them make
better variety decisions.2001
was the first year of testing soybean varieties at Yuma. This sprinkler irrigated trial on soils
with pH in the range of 7.0 – 7.4 included only Roundup Resistant varieties. Yuma has a relatively long growing
season (average 2615 corn growing degree days) and appropriate for Group 2
maturity varieties. Our first
attempt at soybean variety testing was marred by a severe hail storm during the
first week of September. Our
collaborating grower thinks yields were reduced by 40% due to the
storm.Rocky
Ford, site of soybean variety trials for several years, has a longer growing
season (2837 corn growing degree days) and can produce late Group 3 or early
Group 4 maturity soybeans. The
trial was furrow irrigated with a soil pH of 7.8 and both conventional and
Roundup Resistant varieties were included where conventional herbicides were
used. Plots in both trials
consisted of four rows, each 36 ft long. Yields are expressed at 13% grain moisture as bu/ac with 60 lbs of
soybeans in one bushel.Soybean
performance at Rocky Ford1 in 2001.
Plant
Leaf
Variety
Yield
Moisture
Height
Drop
bu/ac
%
in
date2
DG
3399 RR
72.9
7.2
35
275
Pioneer
brand 93B85
72.1
7.0
33
275
Garst
355 (RR)
70.8
6.8
36
273
Pioneer
brand 93B72
69.9
6.9
32
274
Pioneer
brand 93B53
69.1
6.9
34
273
Garst
437 (RR/N)
68.8
7.7
38
277
DG
3388 RR
68.5
7.2
37
0*
Asgrow
AG3903
67.9
7.4
35
275
Asgrow
AG3902
67.8
7.5
36
0*
Garst
381 (RR/STS)
67.6
6.9
35
273
DEKALB
DKB40‑51
61.8
7.6
37
277
Average
68.8
7.2
35
225
CV%
14.9
LSD(0.30)
4.4
1Trial
conducted on the Arkansas Valley Research Center; seeded 6/4 and harvested
10/10. No
shatter.2Julian
date.*Frosted
before leaf drop.
Soybean performance at
Yuma1 in 2001.
Plant
Variety
Yield
Moisture
Height
Shatter
bu/ac
%
in
rating2
DG 3270 RR
47.6
13.4
34
2.3
Syngenta S29‑C9
45.7
11.2
31
2.0
Prairie Brand PB‑2717
(RR)
42.8
11.8
34
2.0
Asgrow AG2703
41.2
13.5
33
2.0
Asgrow AG2402
36.6
12.7
36
3.0
Syngenta S24‑K2
35.0
14.5
36
2.7
Garst 198 (RR)
32.6
12.7
30
3.0
Prairie Brand PB‑2131
(RR)
32.5
12.6
34
3.0
DG 3263 RR
31.6
12.9
37
2.3
DEKALB DKB26‑51
30.8
11.5
31
2.3
Garst 2547 (RR)
29.9
12.4
32
3.3
DEKALB DKB23‑51
28.5
13.0
33
3.0
Asgrow AG2302
28.0
11.0
33
3.0
Garst 2603 (RR)
25.0
13.5
34
3.0
Garst 2112 (RR/N)
24.9
12.3
29
3.0
Average
34.2
12.6
33
2.7
CV%
14.9
LSD(0.30)
4.4
1Trial conducted on the Joe Harper farm; seeded 6/6 and
harvested 9/25.2 Rating scale 0‑10.Shatter was due to hail damage on
September 15.