Katlynn Weathers, D. Brian Arnall, Chad Godsey, William Raun

Katlynn Weathers, D. Brian Arnall, Chad Godsey, William Raun

Katlynn Weathers, D. Brian Arnall, Chad Godsey,
William Raun, & Lance Shepherd
Plant and Soil Sciences Department, Oklahoma State
University, Stillwater, OK
• In a matter of six years canola production has increased from
nearly zero acres planted to 136,000 acres harvested.
• With an increase in acres grown:
 Increase of questions about;
 canola nutrient management needs and application techniques
• Nutrient management is important
 its affect on winter survival
 seed quality
 yield
• Banding fertilizer with seed
 common practice in winter wheat
• Why are we doing this?
• No research has been implemented in the southern great
plains to quantify the impact of banding nitrogen based
fertilizer with seed or established a threshold application rate.
Acres Harvested (1000s)
140
120
100
80
60
40
20
0
2007
2009
2010
2011
2012
Figure 1. Increase of acres of canola harvested in Oklahoma
since 2007.
National Agricultural Statistical Service. www.nass.usda.gov/
• Evaluate the effects of banding Diammonium
Phosphate (DAP or 18-46-0);
 Plant Stand
 Yield
 Oil Quality
• To identify the critical level at which salt
injury occurs when DAP is applied with seed.
• 2 sites
 Perkins – low pH
 Lahoma – low P
• Five rates DAP were placed with the
seed.
• Pre-Plant and Top Dress N Rates were
applied by broadcast application
• Stand counts were taken 2 weeks after
planting over 1 m of row in five
random locations per plot
• GreenSeeker™ to document growth
and vigor of plants at multiple times
during the growing season.
• Plots were swathed then harvested
with Massey 8XP plot combine.
• Subsamples analyzed for protein and
oil content.
• Very low yields due to
a dry fall and spring
• Yield ranged from 3.5
to 13 bu ac-1
• Stand count
decreased as rates of
DAP increased.
• Oil Content in trt 2,
which did not get any
P, had lower oil
content.
0 lbs.
DAP/ ac
DAP 18-46-0 placed with Canola Seed at planting.
30 lbs.
60 lbs.
90 lbs.
120 lbs.
DAP/ ac
DAP/ ac
DAP/ ac
DAP/ ac
150 lbs.
DAP/ ac
Treatment
Bushels per
T Grouping
acre
Protein
T Grouping Oil Quality T Grouping
NDVI
T Grouping
1
27
AB
21.44
A
43.6
AB
0.38
CDE
2
23
AB
21.91
A
42.75
C
0.44
BCD
3
20
AB
21.37
A
43.76
A
0.52
AB
4
18
B
21.63
A
43.4
ABC
0.54
A
5
22
AB
21.5
A
43.63
AB
0.51
AB
6
29
A
21.47
A
43.53
AB
0.45
ABC
7
28
AB
21.9
A
43.17
ABC
0.37
CDE
8
24
AB
21.67
A
43.28
ABC
0.35
DE
9
25
AB
21.59
A
43.18
ABC
0.36
CDE
10
28
A
22.09
A
42.96
BC
0.41
CDE
11
30
A
22.12
A
43.12
ABC
0.41
CDE
12
22
AB
21.26
A
43.67
AB
0.37
CDE
13
27
A
22.05
A
42.97
BC
0.31
E
0.4 m2 is about 3ft of row.
• Stand was significantly negatively impacted at
rates of >60 lbs. of DAP per acre and higher.
• Protein was not affected by treatment at either
location.
• NDVI values were higher with treatments of
pre-plant nitrogen than those of no additional
pre-plant nitrogen.
• Low phosphorus availability effected oil quality.
• Ensure proper fertility is in place at planting.
Thank-you!!!
Oklahoma Oil Seed Commission for
funding this project!