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Extension > Minnesota Crop News > 2017 U of M SE Minnesota regional soybean yield results now available

Wednesday, October 25, 2017

2017 U of M SE Minnesota regional soybean yield results now available

by Lisa Behnken, Fritz Breitenbach, Liz Stahl, and Ryan Miller

soybean-trial
Performance comparisons of early (1.2-1.8) and late (1.9-2.3) maturity glyphosate tolerant/RoundUp Ready soybean in southeastern Minnesota are now available. The studies with 30 early-maturity and 30 late-maturity entries were conducted near Rochester, MN (Lawler site) on a Port Byron silt loam. Trials were planted on May 12, 2017 with a 4-row John Deere 7000 planter equipped with cone units. The seeding rate was 150,000 seeds per acre with seed planted at a depth of 1.5 inches in 30 inch rows. Plots were four rows wide by 22 feet in length and the center two rows of each plot were machine harvested on October 20, 2017.
cone-planter Planting soybean trials with a cone planter

Power in study design

The power of our research is that we replicate the trial to help take out effects due to variability across the field (e.g. soil type, drainage, topography, etc.). Each variety is randomly placed into each block (replication) and this is called a randomized complete block design. In our study, we used four blocks (replications), which is considered the standard for field research. In the tables that follow, moisture and yield results followed by the same letter are not statistically different.

What do the letters in the table mean?

For varieties followed by the same letter, we would not expect to see a difference in yield in the field. Even though the average yield of varieties in this case may be numerically different by a few bushels, there was enough variability in yield across replications that no real trend could be found. In other words, we can't say with confidence that these varieties differ in yield. Consider a comparison between variety X vs Y. If variety X yielded more than Y in two plots, and Y more than X in the others, these likely would come out statistically the same. In another example, variety X may outyield Y in one replication by quite a bit, but then yield less than Y in the other three replications. Here again, these likely would not be considered statistically different, although the average yields may not be numerically the same.

The LSD is the "least significant difference" or the minimum difference in yield we need to see before we can say with confidence that there is a true difference in yield between a pair of varieties. The more variability in yield across a plot, the larger the LSD. The p value (P in the tables below) indicates the probability or confidence we have that two entries differ in yield when the difference is equal to or greater than the LSD. When the P = 0.10, this indicates that we can be 90% confident variety X performs better than variety Y if the yield difference is equal to or greater than the LSD. Likewise, if P = .20, we would have 80% confidence that two varieties differ in yield when the yield difference is equal to or greater than the LSD. For variety trials, a p value of .10 or .20 is considered standard.

For more information about interpretation of the LSD, see the articles Field studies: What do you mean 5 bushels per acre is not significant? or On-farm research.

Soybean yield results

Tables 1 and 2 provide the yield for the early maturity entries at 13% moisture by entry and yield rank, respectively. Early maturity soybean yield average was 68.4 bu/a with a range of 74.1 – 63.4 bu/a. Tables 3 and 4 provide the yield for the late maturity entries at 13% moisture by entry and yield rank, respectively. Late maturity soybean yield average was 67.0 bu/a with a range of 71.5 – 61.9 bu/a.

Note in Table 2 (listed by rank): The highest yielding entries have the letter "a" after the yield value. NORTHRUP KING S14-A6 has a yield of 74.1 bu/a followed by the letter "a". All other entries with the letter "a" after the yield value are statistically the same as NORTHRUP KING S14-A6.

Many of the entries/varieties performed very well and there are not big differences. Yield is one of the primary things to consider when choosing a variety. However, take time to evaluate other replicated, reliable trial results for consistency of a variety's performance. Also, evaluate other key agronomic traits such as maturity, SCN, disease scores, etc. when choosing varieties for your farm. Stay tuned for more updates. (University of Minnesota Extension Regional Office, Rochester, and Southern Research and Outreach Center, Waseca, MN).

Table 1. Early maturity (1.2-1.8) soybean yield results (13% moisture) by entry number from Lawler farm, Rochester, MN, harvested October 20, 2017.

No Entry name Maturity Herbicide trait Moisture Yield
percent (%) bu/a
1 AGRIGOLD G1810RX 1.8 Xtend 10.6 65.1 i-l
2 AGRIGOLD G1850RX 1.8 Xtend 10.5 63.4 l
3 ASGROW AG12X6** 1.2 Xtend 10.6 64.6 jkl
4 ASGROW AG1435 1.4 Glyphosate 10.5 69.1 c-h
5 ASGROW AG1636 1.6 Glyphosate 10.6 67.9 e-j
6 CROPLAN R2C1400 1.4 Glyphosate 10.5 72.1 abc
7 CROPLAN R2C1760 1.7 Glyphosate 10.7 66.1 g-l
8 DAHLMAN 6713XN 1.3 Xtend 10.6 65.9 h-l
9 DAHLMAN 6815XN 1.5 Xtend 10.7 72.9 ab
10 DAIRYLAND DSR-1526/R2Y 1.5 Glyphosate 10.5 69.4 c-g
11 DAIRYLAND DSR-1870/R2Y 1.8 Glyphosate 10.6 69.9 b-e
12 GOLD COUNTRY 1337X 1.3 Xtend 10.7 64.8 jkl
13 GOLD COUNTRY 1814 1.8 Glyphosate 10.7 69.8 b-f
14 LEGEND SEEDS LS-17X802N 1.4 Xtend 10.6 71.5 a-d
15 LEGEND SEEDS LS-17R500 1.8 Glyphosate 10.8 67.6 e-k
16 NORTHSTAR GENETICS NS01528NR2** 1.5 Glyphosate 10.6 72.0 abc
17 NORTHSTAR GENETICS NS 1776NR2** 1.7 Glyphosate 10.7 65.6 h-l
18 NORTHRUP KING S12-R3 1.2 Glyphosate 10.8 70.1 b-e
19 NORTHRUP KING S14-A6 1.4 Glyphosate 10.7 74.1 a
20 PIONEER BRAND P12A59X 1.2 Xtend 10.3 64.3 kl
21 PIONEER BRAND P15T46R2 1.5 Glyphosate 10.8 66.4 f-l
22 PRAIRIE BRAND 1787R2 1.7 Glyphosate 10.5 68.5 d-i
23 PRAIRIE BRAND 1376R2 1.3 Glyphosate 10.6 69.8 b-e
24 PRODUCERS HYBRIDS 1816NRX 1.8 Xtend 10.7 65.6 i-l
25 RENK RS147NR2 1.4 Glyphosate 10.6 68.5 d-i
26 RENK RS187NR2 1.8 Glyphosate 10.7 69.9 b-e
27 STINE 13R132 1.3 Glyphosate 10.5 70.9 a-e
28 STINE 14RD62 1.4 Glyphosate 10.7 67.9 e-j
29 TITAN PRO TP-16X77 1.6 Xtend 10.7 72.1 abc
30 TITAN PRO TP-18X97 1.8 Xtend 10.7 66.0 g-l
LSD p=0.10 NS 3.4
Grand mean 10.6 68.4
**Committee entry
Means followed by the same letter are not significantly different at the p=0.10 level


Table 2. Early maturity (1.2-1.8) soybean yield results (13% moisture) ranked by yield from Lawler farm, Rochester, MN, harvested October 20, 2017.
No Entry name Maturity Herbicide trait Moisture Yield
percent (%) bu/a
19 NORTHRUP KING S14-A6 1.4 Glyphosate 10.7 74.1 a
9 DAHLMAN 6815XN 1.5 Xtend 10.7 72.9 ab
6 CROPLAN R2C1400 1.4 Glyphosate 10.5 72.1 abc
29 TITAN PRO TP-16X77 1.6 Xtend 10.7 72.1 abc
16 NORTHSTAR GENETICS NS01528NR2** 1.5 Glyphosate 10.6 72.0 abc
14 LEGEND SEEDS LS-17X802N 1.4 Xtend 10.6 71.5 a-d
27 STINE 13R132 1.3 Glyphosate 10.5 70.9 a-e
18 NORTHRUP KING S12-R3 1.2 Glyphosate 10.8 70.1 b-e
11 DAIRYLAND DSR-1870/R2Y 1.8 Glyphosate 10.6 69.9 b-e
26 RENK RS187NR2 1.8 Glyphosate 10.7 69.9 b-e
13 GOLD COUNTRY 1814 1.8 Glyphosate 10.7 69.8 b-f
23 PRAIRIE BRAND 1376R2 1.3 Glyphosate 10.6 69.8 b-e
10 DAIRYLAND DSR-1526/R2Y 1.5 Glyphosate 10.5 69.4 c-g
4 ASGROW AG1435 1.4 Glyphosate 10.5 69.1 c-h
22 PRAIRIE BRAND 1787R2 1.7 Glyphosate 10.5 68.5 d-i
25 RENK RS147NR2 1.4 Glyphosate 10.6 68.5 d-i
5 ASGROW AG1636 1.6 Glyphosate 10.6 67.9 e-j
28 STINE 14RD62 1.4 Glyphosate 10.7 67.9 e-j
15 LEGEND SEEDS LS-17R500 1.8 Glyphosate 10.8 67.6 e-k
21 PIONEER BRAND P15T46R2 1.5 Glyphosate 10.8 66.4 f-l
7 CROPLAN R2C1760 1.7 Glyphosate 10.7 66.1 g-l
30 TITAN PRO TP-18X97 1.8 Xtend 10.7 66.0 g-l
8 DAHLMAN 6713XN 1.3 Xtend 10.6 65.9 h-l
17 NORTHSTAR GENETICS NS 1776NR2** 1.7 Glyphosate 10.7 65.6 h-l
24 PRODUCERS HYBRIDS 1816NRX 1.8 Xtend 10.7 65.6 i-l
1 AGRIGOLD G1810RX 1.8 Xtend 10.6 65.1 i-l
12 GOLD COUNTRY 1337X 1.3 Xtend 10.7 64.8 jkl
3 ASGROW AG12X6** 1.2 Xtend 10.6 64.6 jkl
20 PIONEER BRAND P12A59X 1.2 Xtend 10.3 64.3 kl
2 AGRIGOLD G1850RX 1.8 Xtend 10.5 63.4 l
LSD p=0.10 NS 3.4
Grand mean 10.6 68.4
**Committee entry
Means followed by the same letter are not significantly different at the p=0.10 level

Table 3. Late maturity (1.9-2.3) soybean yield results (13% moisture) by entry number from Lawler farm, Rochester, MN, harvested October 20, 2017.
No. Entry name Maturity Herbicide trait Moisture Yield
percent (%) bu/a
1 AGRIGOLD G2105RX 2.1 Xtend 10.5 a-e 66.5 c-i
2 AGRIGOLD G2355RX 2.3 Xtend 10.5 a-e 63.0 hij
3 ASGROW 21X7 2.1 Xtend 10.6 a-d 71.5 a
4 ASGROW AG2336 2.3 Glyphosate 10.5 a-e 67.5 a-h
5 ASGROW 2035 2.0 Glyphosate 10.6 abc 65.3 e-j
6 CROPLAN R2C1950 1.9 Glyphosate 10.4 b-f 67.4 a-h
7 CROPLAN R2C2025 2.0 Glyphosate 10.6 abc 66.9 b-i
8 DAHLMAN 6721XN 2.0 Xtend 10.4 b-f 71.2 ab
9 DAHLMAN 6820XN 2.0 Xtend 10.7 a 63.3 g-j
10 DAIRYLAND DSR-2110/R2Y 2.1 Glyphosate 10.5 a-e 63.4 f-j
11 DAIRYLAND DSR-2330/R2Y 2.3 Glyphosate 10.6 ab 65.4 d-j
12 GOLD COUNTRY 2026X 2.0 Xtend 10.4 d-g 66.9 a-i
13 NORTHSTAR GENETICS 2031NR2** 2.0 Glyphosate 10.5 b-f 67.6 a-g
14 GOLD COUNTRY 2227X 2.2 Xtend 10.6 abc 66.8 b-i
15 LEGEND SEEDS LS 20R524N 2.0 Glyphosate 10.3 fgh 62.7 ij
16 LEGEND SEEDS LS 21X705N 2.1 Xtend 10.5 a-e 69.2 a-e
17 NORTHRUP KING S20T6** 2.0 Glyphosate 10.2 gh 70.1 abc
18 GOLDEN HARVEST GH 1915X 1.9 Xtend 10.5 b-f 70.7 abc
19 GOLDEN HARVEST GH 2230X 2.2 Xtend 10.4 d-g 68.8 a-e
20 PIONEER BRAND P19T39R2 1.9 Glyphosate 10.6 abc 61.9 j
21 PIONEER BRAND P22T73R 2.2 Glyphosate 10.6 abc 67.1 a-i
22 PRAIRIE BRAND 1956R2 1.9 Glyphosate 10.5 b-f 67.4 a-h
23 PRAIRIE BRAND 2024R2 2.0 Glyphosate 10.5 b-f 67.2 a-i
24 TITAN PRO TP21X46 2.1 Xtend 10.4 efg 69.0 a-e
25 PRODUCERS HYBRIDS 2316NRX 2.3 Xtend 10.4 b-f 65.0 e-j
26 RENK RS195NR2 1.9 Glyphosate 10.6 abc 70.6 abc
27 RENK RS213NR2 2.1 Glyphosate 10.4 c-f 66.9 b-i
28 STINE 19RF32** 1.9 Glyphosate 10.6 abc 63.4 f-j
29 STINE 19BA23 1.9 Glyphosate 10.5 b-f 69.9 a-d
30 STINE 21R132 2.1 Glyphosate 10.1 h 67.9 a-f
LSD p=0.10 0.2 4.6
Grand mean 10.5 67.0
**Committee entry
Means followed by the same letter are not significantly different at the p=0.10 level

Table 4. Late maturity (1.9-2.3) soybean yield results (13% moisture) ranked by yield from Lawler farm, Rochester, MN, harvested October 20, 2017.
No. Entry name Maturity Herbicide trait Moisture Yield
percent (%) bu/a
3 ASGROW 21X7 2.1 Xtend 10.6 a-d 71.5 a
8 DAHLMAN 6721XN 2.0 Xtend 10.4 b-f 71.2 ab
18 GOLDEN HARVEST GH 1915X 1.9 Xtend 10.5 b-f 70.7 abc
26 RENK RS195NR2 1.9 Glyphosate 10.6 abc 70.6 abc
17 NORTHRUP KING S20T6** 2.0 Glyphosate 10.2 gh 70.1 abc
29 STINE 19BA23 1.9 Glyphosate 10.5 b-f 69.9 a-d
16 LEGEND SEEDS LS 21X705N 2.1 Xtend 10.5 a-e 69.2 a-e
24 TITAN PRO TP21X46 2.1 Xtend 10.4 efg 69.0 a-e
19 GOLDEN HARVEST GH 2230X 2.2 Xtend 10.4 d-g 68.8 a-e
30 STINE 21R132 2.1 Glyphosate 10.1 h 67.9 a-f
13 NORTHSTAR GENETICS 2031NR2** 2.0 Glyphosate 10.5 b-f 67.6 a-g
4 ASGROW AG2336 2.3 Glyphosate 10.5 a-e 67.5 a-h
6 CROPLAN R2C1950 1.9 Glyphosate 10.4 b-f 67.4 a-h
22 PRAIRIE BRAND 1956R2 1.9 Glyphosate 10.5 b-f 67.4 a-h
23 PRAIRIE BRAND 2024R2 2.0 Glyphosate 10.5 b-f 67.2 a-i
21 PIONEER BRAND P22T73R 2.2 Glyphosate 10.6 abc 67.1 a-i
12 GOLD COUNTRY 2026X 2.0 Xtend 10.4 d-g 66.9 a-i
7 CROPLAN R2C2025 2.0 Glyphosate 10.6 abc 66.9 b-i
27 RENK RS213NR2 2.1 Glyphosate 10.4 c-f 66.9 b-i
14 GOLD COUNTRY 2227X 2.2 Xtend 10.6 abc 66.8 b-i
1 AGRIGOLD G2105RX 2.1 Xtend 10.5 a-e 66.5 c-i
11 DAIRYLAND DSR-2330/R2Y 2.3 Glyphosate 10.6 ab 65.4 d-j
5 ASGROW 2035 2.0 Glyphosate 10.6 abc 65.3 e-j
25 PRODUCERS HYBRIDS 2316NRX 2.3 Xtend 10.4 b-f 65.0 e-j
10 DAIRYLAND DSR-2110/R2Y 2.1 Glyphosate 10.5 a-e 63.4 f-j
28 STINE 19RF32** 1.9 Glyphosate 10.6 abc 63.4 f-j
9 DAHLMAN 6820XN 2.0 Xtend 10.7 a 63.3 g-j
2 AGRIGOLD G2355RX 2.3 Xtend 10.5 a-e 63.0 hij
15 LEGEND SEEDS LS 20R524N 2.0 Glyphosate 10.3 fgh 62.7 ij
20 PIONEER BRAND P19T39R2 1.9 Glyphosate 10.6 abc 61.9 j
LSD p=0.10 0.2 4.6
Grand mean 10.5 67.0
**Committee entry
Means followed by the same letter are not significantly different at the p=0.10 level

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