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2013 Soybean Production Update
Greg Endres, Extension area agronomistNDSU Carrington Research Extension Center
[email protected] 701-652-2951
•South-central ND season review
•Plant establishment•Timing of weed control
May-Sep monthly rainfall, South-central ND, 2013
inch
es
Soybean Establishment Study, CREC, 2011-13
• 2 ti l lage systems– conventional and direct seed (‘no-till’)
• 2 planting dates – multiple trials
• 4 (planting time) ferti l izer treatments– 6-24-6 applied on low-med P (7-9 ppm) and
high-VH K (141-216 ppm) soil – untreated check, broadcast, 2-inch band
• POST fungicide (2 of 4 reps)
Funded by ND Soybean Council
May 30
July 22
conventional direct seed
Soybean Establishment Study, Carrington, 2011-13: SEED YIELD WITH TILLAGE SYSTEMS
40.8
52.5
45.2 45.943.4
51.8
40.8
45.3
0
10
20
30
40
50
60
2011 2012 2013 3-yr ave
conventional
direct seed
*
*
Averaged across planting dates and fertilizer treatments
Soybean Establishment Studies, CREC, 2011-12: SEED YIELD WITH PLANTING DATES
43.5
53.7
37.6
27.9
40.7
50.6
30.3
19.5
0
10
20
30
40
50
60
Carrington2011
Carrington2012
New Rockford2012
Wishek 2012
early
normal
*
*
*
Apr 30/May 15 May 2/17 Apr 24/May 16May 5/19
Soybean Establishment Study, CREC, 2013: Planting dates
May 29 June 12
Soybean Establishment Study, CREC, 2013: Planting dates – impact on plant development and agronomic factors
Planting datesDates for plant development
Emergence Flower Maturity (R8)
May 29 163 196 273June 12 171 202 280Difference in days 8 6 7
Planting datesPlants/A Pod height Test weightJune 28 cm lb/bu
May 29 134,740 2 53.7June 12 129,430 4 52.1
Soybean Establishment Study, CREC, 2013: SEED YIELD WITH PLANTING DATES
43.1 42.9
0
10
20
30
40
50
Carrington
29-May
12-Jun
Averaged across tillage systems and fertilizer treatments
Planting date x maturity group, Prosper, 2013
Planting dates: May 13 and 28Maturity groups: 0.1 and 0.7(DSR 0101 and 0747)
Planting date x maturity group, Prosper, 2013Planting date
Stand Yieldplants/A bu/A
May 13 146,560 45.8May 28 165,620 40.4
Planting date
Maturity group
Yieldbu/A
May 13 0.1 46.00.7 45.7
May 28 0.1 38.20.7 42.5
Planting date x maturity group, Wishek, 2013
May 24 June 6 Planting dates:
Planting date (4) x variety (2), CREC, 2013Burton Johnson
Soybean Establishment Study, CREC, 2011-13: SEED YIELD WITH PLANTING-TIME FERTILIZER
43.745.3
42.3
46.043.0
45.8
0
10
20
30
40
50
60
2013 2011-13
check
broadcast
2" band
P = low-med and K = high-VH. 6-24-6 applied as band at planting or broadcast PRE (not mechanically incorporated). Averaged across planting dates and tillage systems.
Soybean establishment study, CREC, 2013: SEED YIELD WITH FUNGICIDE 1
44.541.5
010
2030
4050
bu/A
unt reat ed checkPriaxor
14 fl oz/A at R3-4 stages
NDSU Soybean Foliar Fungicide Trials, 2004-13 (29 tr ials): SEED YIELD1
41.943.7
010
2030
4050
bu/A
unt reat ed checkfungicide
1Headline or Priaxor applied primarily at R1-3 stages (V2-R4). Yield statistically significant (LSD 0.05) in 5 of 29 trials.
Source: Markell et al.
Timing of initial weed control Soybean yieldWeed height Soybean stage bu/A
48.0
2 to 4 inches
VC-V2 (unifoliate to 1st
trifoliate) 46.9
6 to 8 inches
V2-V4 (2nd to 4th trifoliate) 45.2
> 10 inches
V4-R2 (4th trifoliate to
full flower) 37.719.3
NDSU: 4 site-years (2011-12).
Soybean yield loss from weeds
At planting (soil application)
Untreated check
Soybean t iming of init ial weed control, Carrington, 2013
early POST – June 21
July 11 – late POST
Soybean yield with timing of initial weed control, Carrington, 2013.
22.9
32.8
27.429.8
22.7
0
5
10
15
20
25
30
35
Carrington
check
at planting
ePOST
mPOST
lPOST
Bu/
A
LSD (0.05): NS
Soybean timing of initial weed control, NCREC (Minot), 2013
Sep 12
NDSU Research Summary of Soybean Plant Establishment Factors (Oct 2013)
Factor A Yield >(%)
B NDSU tr ial site-years
^Til lage system reduced till 7 conventional till 19*
Previous crop wheat 7 soybean 6Seed inoculat ion with soybean history
yes0
no 6
Seed fungicide yes 10 no 19^Planting date < early May 13 mid May 4Planting rate (pls/A) 150-175,000 5 100-130,000 20Row spacing ( inch)
14-21 5 28-30 19
^P at planting t ime
broadcast 0 band (away from seed)
5*
^Timing of Weed Removal
at planting 5 early POST 5**Data from trials conducted during 1999-2013
Questions?