Intensive Spring Wheat Management - Garrison, ND
Cooperator: Sakakawea MEY club, Brad
Miller, Dakota Growers Pasta Co. Carrington, ND
Kent McKay, Area Extension Specialist/Cropping Systems
Kristie Michels, Research Specialist
Shanna Mazurek, Field Assistant
Trial Information:
The objective of this trial was to evaluate seeding rate, nitrogen
rate/yield goal, and nitrogen application timing in spring wheat. The
trial was conducted on the Darrin Sletten farm 12 miles northwest of
Garrison. The trial was a randomized complete block design with four
replications. 'Reeder' spring wheat was seeded May 18 on previous canola
ground. The soil tested 40 pounds of nitrogen in the top two feet. Yield
goals of 50 and 70 bushels were compared in the study; which resulted in
an additional 85 and 135 pounds of actual nitrogen per acre to be applied.
Seeding rates of 1.2 million Pure Live Seed (PLS) (83 lbs/A) and 2.0
million PLS (140 lbs/A) were used. Fertility treatments are described
below. Plots were harvested with a plot combine on September 1.
Fertility Treatments:
1. 50 bu yield goal: 85 lbs of actual N (urea) was broadcasted May 10.
2. 70 bu yield goal: 135 lbs of actual N
(urea ) was broadcasted on May 10.
3. 70 bu yield goal: 85 lbs of actual N
(urea) was broadcasted on May 10. An additional 50 lbs of actual N was
applied at the 5 leaf stage on June 22 with a CO2 pressurized sprayer,
equipped with StreamJet nozzles delivering 16.6 gallons of 28-0-0.
4. 70 bu yield goal: 85 lbs of actual N
(urea) was broadcasted on May 10. An additional 50 lbs of actual N was
applied at the flag leaf stage July 7 with a CO2 pressurized sprayer,
equipped with StreamJet nozzles delivering 16.6 gallons of 28-0-0.
5. 50 bu yield goal: 40 lbs of actual N
(urea) was broadcasted May 10. An additional 45 lbs of actual N was
applied at the 5 leaf stage June 22 with a CO2 pressurized sprayer,
equipped with StreamJet nozzles delivering 15 gallons of 28-0-0.
6. 50 bu yield goal: 85 lbs of actual N was
applied at the 3 leaf stage June 11 with a CO2 pressurized sprayer,
equipped with StreamJet nozzles delivering 28.3 gallons of 28-0-0.
7. 50 bu yield goal: 85 lbs of actual N was
applied at the 5 leaf stage June 22 with a CO2 pressurized sprayer,
equipped with StreamJet nozzles delivering 28.3 gallons of 28-0-0.
Seeding Rate Results:
Stand counts were taken June 4. The 1.2 M seeding rate established
approximately 900,000 plants per acre, while the 2.0 M seeding rate
established 1.5 million plants per acre. There was no difference in plant
population across fertility treatments. The 2.0 M seeding rate
significantly raised test weight when averaged across all fertility
treatments (Table 1).
|
Table 1. Spring wheat yield, test weight
and protein results averaged across fertility treatments |
|
Table 2. Intensive Spring Wheat Management
Trial Results, Garrison, ND. 2004 |
|
|
Seed |
Yield Goal |
Yield |
Test Wht. |
Protein |
Net Income |
|
Treatment |
Rate/A |
bu/A |
bu/A |
lb/bu |
% |
$/Acre* |
|
85 lbs N Preplant |
1.2M PLS |
50 |
49.5 |
60.8 |
12.9 |
108.85 |
|
85 lbs N Preplant |
2.0M PLS |
50 |
50.5 |
61.4 |
12.8 |
106.93 |
|
85 lbs N Preplant |
1.2M PLS |
50 |
51.0 |
60.8 |
12.8 |
103.41 |
|
Headline 3 fl oz/A 5 leaf |
|
|
|
|
|
|
|
85 lbs N Preplant |
2.0M PLS |
50 |
52.5 |
61.7 |
12.9 |
102.90 |
|
Headline 3 fl oz/A 5 leaf |
|
|
|
|
|
|
|
135 lbs N Preplant |
1.2M PLS |
70 |
52.3 |
60.2 |
14.1 |
127.33 |
|
135 lbs N Preplant |
2.0M PLS |
70 |
54.2 |
61.1 |
14.0 |
128.87 |
|
85 lbs N Preplant + 50 lbs N 5 lf |
1.2M PLS |
70 |
49.9 |
60.7 |
13.6 |
107.18 |
|
85 lbs N Preplant + 50 lbs N 5 lf |
2.0M PLS |
70 |
53.9 |
61.5 |
13.6 |
115.03 |
|
85 lbs N Preplant + 50 lbs N flag |
1.2M PLS |
70 |
48.0 |
60.6 |
13.2 |
93.52 |
|
85 lbs N Preplant + 50 lbs N flag |
2.0M PLS |
70 |
53.0 |
61.1 |
13.8 |
117.50 |
|
40 lbs N Preplant + 45 lbs N 5 lf |
1.2M PLS |
50 |
49.6 |
60.9 |
12.7 |
100.98 |
|
40 lbs N Preplant + 45 lbs N 5 lf |
2.0M PLS |
50 |
51.6 |
61.8 |
13.0 |
109.76 |
|
85 lbs N 3 leaf |
1.2M PLS |
50 |
49.0 |
60.9 |
12.2 |
98.81 |
|
85 lbs N 3 leaf |
2.0M PLS |
50 |
48.3 |
61.9 |
12.3 |
92.00 |
|
85 lbs N 5 leaf |
1.2M PLS |
50 |
47.2 |
60.9 |
12.4 |
97.78 |
|
85 lbs N 5 leaf |
2.0M PLS |
50 |
48.9 |
61.5 |
12.5 |
97.65 |
|
LSD (P=.05) |
|
|
2.8 |
0.6 |
0.5 |
NA |
|
Standard Deviation |
|
|
1.9 |
0.4 |
0.4 |
NA |
|
CV |
|
|
3.8 |
0.7 |
2.9 |
NA |
|
Grand Mean |
|
|
50.6 |
61.1 |
13.0 |
106.8 |
|
*Spring wheat price quoted from Garrison Farmers Union
Elevator on December 2, 2004. $3.31 for 14% protein; an $0.08
discount for every 1/5 percentage point below 14, e.g. 13% protein was
$2.91 |
|
Net income figured as gross income minus seed,
fertilizer, fungicide, and application costs. Other expenses would be
the same across treatments. Prices used for figuring net income are:
Urea, $0.1335/lb; Urea application, $3.75/A; 28-0-0, $0.89/G; 28-0-0
application, $4.00; and Headline 3 fl oz/A, $5.69/A |
Results:
Spring wheat yield averaged across all treatments was 51 bushels per acre.
The 70 bu YG fertility treatments only produced wheat yields in the 50 bu
range; however, averaged across treatments had slightly higher yields than
the 50 bu YG fertility treatments. The 70 bu YG treatments had
significantly higher protein than most 50 bu YG treatments. This resulted
in higher net income for the 70 bu YG treatments, especially with the 2.0
M PLS fertility treatments. Even though the 2.0M PLS 70 bu YG treatments
had higher nitrogen and seed cost expenses, the higher protein increased
the grain price resulting in higher net income.
|
