2017 nw iowa research farm and on-farm project results...2017 nw iowa research farm and on-farm...
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2017 NW Iowa Research
Farm and On-Farm Project
Results
2018 Crop Advantage Series
Joel DeJong, ISU Extension Field Agronomist
Andrew Weaver, On-farm coordinator, NW Research Farm
http://farms.ag.iastate.edu/content/northwest-research-and-
demonstration-farm
NW Iowa On-Farm Projects
On-farm project coordinator
- Andrew Weaver
2017 Cooperators who completed projects:Gary TreiDordt College - Mike SchoutenSteve AbmaWes & Wade DeGrootRodney & Ross MoglerRuss GladeDean MeyerBruce ZomermaandDave RossmanSteve AgarMorris Metzger & Marty Knobloch
Iowa Fungicide Efficacy Trials - 2017
NWRF
SWRFSERF
NERFNRF
A&AE
-40.00
-30.00
-20.00
-10.00
0.00
10.00
20.00
30.00
40.00-40.00
-30.00
-20.00
-10.00
0.00
10.00
20.00
30.00
40.00
-40.00
-30.00
-20.00
-10.00
0.00
10.00
20.00
30.00
40.00
Corn Fungicide Summary 2010-2016
V5-V6 (N=168)Mean = 0.4 bu/A
VT-R2 (N=N= 287)Mean = 3.5 bu/A
V5-6 + VT-R2 (N=N= 287)Mean = 3.5 bu/A
Location x Timing 2010-2016
Boone NERF NRFa NWRF SERFb SWRFb
V5-V6 1.3 (N=37)
3.9 (N=31)
0.5 (N=24)
-0.6 (N=31)
-3.1 (N=20)
1.2 (N=25)
VT-R2 0.9 (N=60)
6.1 (N=52)
3.4 (N=40)
5.2 (N=53)
3.0 (N=38)
2.1 (N=43)
V5-V6 + VT-R2
-0.2 (N=32)
5.1 (N=32)
3.5 (N=25)
7.7 (N=31)
0.2 (N=20)
2.7 (N=26)
a No 2010 datab No 2016 data
2017 Effect of timing on disease severity
NS
V5 application NO effect on disease
Up1-9
NWRF NRF NERF AEA SWRF SERF
Hybrid P0157AMXMycogen
2A627P0157AMX P0969AM P0937AM P1197AMXT
GLS score 4 6 4 3 5 5
Yield check 224.8 257.4 234.9 248.5 216.0 269.0
Overall -2.3 1.9 1.2 4.7 -0.9 18.6
V5 0.0 4.9 -0.8 3.1 -6.1 15.6
R1 -3.7 2.2 1.5 7.0 1.4 19.2
V5+R1 -0.3 -2.9 0.8 0.0 -5.0 19.3
V12 -1.8 5.2 2.5 4.1 1.0 17.8
Effect of timing on yield response
ALL non-significant P<0.1
-8
-6
-4
-2
0
2
4
6
8
Corn Fungicide, NW Iowa, V-6 to V-8 stage, 2010 - 2016
Treated minus
Untreated, Bu/A
N = 30
AVE. = 0.53 bu/a
-5
0
5
10
15
20
25
Corn Fungicide, NW Iowa, Ground Application, 2008 - 2016
Treated minus
Untreated, Bu/A
N = 42
Average = 5.82 bu/a
Can fungicides improve standability?
Treatments
Fungicide applied: 1. Yes (Headline Amp 10 oz/A)
2. No
Harvest date: 1. Slightly early2. ~1 week later3. ~2 weeks later4. ~3 weeks later5. ~ 4 weeks later
Effect of harvest date on lodging - 2017
0
5
10
15
20
25
30
35
40
45
NWRF NRF NERF AEA SWRF SERF
Lod
gin
g (%
)
a
b
d
cc
a
b
d
bccd
a
b
dcbc
a
b
cc
ab
c
dd
a
bc
cd
a
b
d
Effect of fungicide on lodging - 2017
0
5
10
15
20
25
30
35
40
NWRF NRF NERF AEA SWRF SERF
Lod
gin
g (%
)
No fungicide Fungicide
a
b
a
b
a
b
a
b
NS
NS
2017 Soybean
Fungicide Trial
• Sioux County, Aproach fungicide
• No-till, planted 5-13-17, 4 reps
• Treated: 63.47 bu/a ave
• Untreated: 63.59 bu/a ave
13
Summary data from 60 Soybean
Fungicide Trials, through 2017• Overall average:
– Treated = 64.73 bu/a
– Untreated = 62.37 bu/a
• Other notes of interest:
– None had the treated more than 1 bu/a less
– 16 had more than a 3 bu/a increase with
fungicide (27%)
– 5 total Monona County trials, 4 had a greater
than 3 bu/a increase
14
Sites were located in included Osceola, Lyon, Osceola, Buena Vista, Clay and Monona counties
NW Iowa Row Spacing Trials
Current ResearchLocation Year Site
YearTarget Seeding Rate(1000 sds/ac)
Hybrid
Sac County 2009 1 30, 35, 40 DeKalb 61-69
Sac County 2009 2 30, 35, 40 DeKalb 61-69
Sac County 2010 3 30, 35, 40 Mycogen 2A551
Sac County 2010 4 30, 35, 40 Mycogen 2J597
Lyon County 2014 5 30, 36, 42 Pioneer P0193 & P0297
Lyon County 2015 6 30, 36, 42 Pioneer P0157 & P0297
O’Brien County 2015 7 30, 36, 42 DeKalb 52-84 & 53-36
O’Brien County 2015 8 30, 36, 42 Pioneer P0157 & P0297
O’Brien County 2016 9 30, 34, 38, 42 DeKalb 52-84 & 53-36
O’Brien County 2016 10 30, 34, 38, 42 Pioneer P0157 & P0297
**
***
20” 30”
20” 30”
30”
20”
4.9 bu/a*
16.2 bu/a*
9.3 bu/a*
1.4 bu/a
-2.0 bu/a
7.9 bu/a*
* = statistically significant
Lyon – 2014 Lyon 2015 NWRF 2015 NWRF 2015 NWRF 2016 NWRF 2016
30 in.20 in.
2017 Soybean
Population Trials
• Osceola County, conventional, planted 5/13, 30”
rows
125K = 70.4 bu/a 150K = 69.9 bu/a 175K = 70.1 bu/a
• Sioux County, no-till, planted 5/11, 30” rows
90K = 73.6 bu/a 130K = 74.3 bu/a
110K = 73.9 bu/a 150K = 75.8 bu/a
19
Soybean Plant Population Trials
37 trials through 2016
125K average = 57.3 bu/a
175K = 57.6 bu/a
One was statistically
different at 3.3 bu/acre
20
2017 Soybean
Row Spacing Trial
• Lyon County, Strip-till, planted 5/10, 140K, following
corn, 3 reps.
• 30” rows averaged 66 bu/acre
• 15” rows averaged 61.7 bu/acre
• NOTE: Significant white mold in this plot
21
Soybean row spacing trials –
’08 – ‘14• 14 trials 15” v. 30”
– 15” average = 60.64 bu/a
– 30” average = 58.24 bu/a• 5 of 14 showed at least a 3+ bu/a increase with narrow
rows.
• 8 trials 18” v. 36”
– 18” average = 59.99 bu/a
– 36” average = 55.61 bu/a• 5 of 14 showed at least a 3+ bu/a increase with narrow
rows.
22
NWRF Soybean row spacing
research – 2016 - Asgrow
23
NWRF Soybean row spacing
research – 2017 - Asgrow
24
NWRF Soybean row spacing
research – 2016 - Pioneer
25
NWRF Soybean row spacing
research – 2017 - Pioneer
26
Tilled v. No-Tilled Soybeans
• 17 trials, from 2006 through 2016.
– Mostly compared to a single pass tillage
• Overall average:
Tilled = 60.4 bu/a No-tilled = 60.3 bu/a
• 3 of 17 had a 2 bu/a or greater increase with
tillage; 2 favored no-till by 2 bu/a or more.
27
Rolling Soybeans, 2009 – 2014, 21 trials
Rolled – average = 58.3 bu/acre
Not rolled = 57.7 bu/acre
1 < 2 bu/acre
2 > 2 bu/acre
Biggest was + 6.3 bu/A
28
Photo from Corn+Soybean Digest, 6/12/15
Starter fertilizer on corn• Osceola County – 2 cooperators. Four gallons
• 6-24-6-.5Zn in-furrow per acre. Soil test levels optimum or better.
Location Starter, bu/a Untreated, bu/a
1 G 214.4 210.4
2 244.8 240.5
3 252.2 250.5
4 246.3 243.4
5 259.4 256.3
6 247.0 244.7
7 219.7 224.6
8 250.9 252.3Ave: 241.8 240.3
29
Soybean Variety & Herbicide
Trial
• Sioux County. Authority + Warrant. F/B
Liberty (L beans); Flexstar + glyphosate (R
beans); or Extendimax + glyphosate (X
beans).
P22T10L P22T73R P22T24X
69.4 bu/a 75.6 bu/a 74.4 bu/a
30
Aphid tolerant v. non-tolerant soybeans
• Sioux County, not treated for aphids, on organic acres
• Viking 2188 (tolerant) v. Viking 2065
66.7 bu/a 64.3 bu/a
Corn RW Insecticide trial on continuous corn
• Lyon County, planted May 4. Both hybrids contain Herculex Extra traits.
• 5 reps
With Aztec HC W/out
Site 1: 218.1 bu/a 214.5 bu/a
Site 2: 236.8 bu/a* 231.0 bu/a
* = significant at P < .10
Corn Herbicide Yield ComparisonA trial to compare crop yield on corn post treated with either
Impact+atrazine+MAS+AMS to Realm Q + glyphosate
Impact Realm Q
Site #1: 231.6 bu/a 233.1 bu/a
Site #2: 252.8 bu/a 254.4 bu/a
Site #3: 229.7 bu/a 231.7 bu/a
Site #4: 232.7 bu/a 233.7 bu/a
Other trials conducted on NW Iowa farms in 2017
• Encirca with Y-drop N application
• Soybean inoculation
• Side dress N vs. none with manure
• Early v. late planting of soybean
• To find results from additional trials,
check these web sites:
– http://farms.ag.iastate.edu/farms
• OR:
– http://www.extension.iastate.edu/plymouth/
crops
**But – full results won’t be available in a
printed form until February, I think.
There is more!!!
Joel DeJong, ISUEO Field AgronomistPlymouth Co. Extension Office
jldejong@iastate.edu712-546-7835 @joel_dejong
Thank you.
What questionsdo you have for
me?
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