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Title: Nitrogen Rates on Hard Red Winter & Spring Wheat

Scott Banks, OMAF, Field Crop Technology

Objective: To look at optimum N rates for 1) Yield and 2) Protein.

Background: With the new higher yielding varieties, the current nitrogen rates may not be optimizing yield and by achieving the protein level required obtaining the full protein premium.

Locations: Quinte Regional SCIA

Site Selection: 7 On-farm sites (see plot layout below)

Plot Setup and Harvesting Layout: Each treatment to be replicated at least once. The replication could be the other side of the field. Avoid placing the same treatment beside each other.

Treatment Sizes: The width of each treatment would be a minimum of 3 widths of the combine header, to allow harvest up & back, or as wide as the wide of the fertilizer spreader/applicator (60 feet).

Assessments: Soil nitrated sample to be taken 1st at thaw and again within 5 days prior to each N application. Plant population counts to be taken.Grain Yield, moisture, protein and bushel weight to be measured at harvest.

Duration: 3 years

Plot Layout Hard Red Winter Wheat

  • Standard Nitrogen Rate (X lbs/ac)
  • Standard Nitrogen Rate (X lbs/ac) - to be harvested
  • Nitrogen Rate (0 lbs/ac) - to be harvested
  • Nitrogen Rate (X-30 lbs/ac) - to be harvested
  • Nitrogen Rate (X+30 lbs/ac) - to be harvested
  • Standard Nitrogen Rate (X lbs/ac) - to be harvested
  • Standard Nitrogen Rate (X lbs/ac)
  • Standard Nitrogen Rate (X lbs/ac) - to be harvested
  • Nitrogen Rate (X+30 lbs/ac) - to be harvested
  • Nitrogen Rate (0 lbs/ac) - to be harvested
  • Nitrogen Rate (X-30 lbs/ac) - to be harvested
  • Standard Nitrogen Rate (X lbs/ac) - to be harvested
  • Standard Nitrogen Rate (X lbs/ac)

2003 Results

Cooperator: Dennis Laver
Plot: Nitrogen Rates on Hard Red Winter Wheat
Variety: AC Morley
Pianting Date: 1-Oct-02 No-till
Fertilizer: 11-52-0 @100 lbs/ac
Urea 8-May-03
Previous Crop: Soybeans
Pool B =$1 70.00 per mt     $0.32 /lbs N
N Rate(lbs/ac)Protein %Yield (bu/ac)Yield (mt/ac)Protein Premium ($/mt)Gross ($/ac) N Cost $/acGross Less N Costs
011.450.01.4$9$244$0.00$244
7012.660.41.6$15$304$22.40$282
10012.663.01.7$15$317$32.00$285
10012.667.51.8$15$340$32.00$308
13012.773.02.0$15$368$41.60$326
Average12.462.8 

Cooperator: David Glover
Plot: Nitrogen Rates on Hard Red Winter Wheat
Pool B = $170.00     $0.32 $/lbs N
N Rate(lbs/ac)Protein %Yield (bu/ac)Yield (mt/ac)Protein Premium ($/mt)Gross ($/ac) N Cost $/acGross Less N Costs
011.661.01.7$11$301$0.00$301
4011.967.01.8$14$336$12.80$323
7012.173.02.0$15$368$22.40$345
10012.682.02.2$15$413$32.00$381
Average12.170.8 

Cooperator: Darcy McKague
Plot: Nitrogen Rates on Hard Red Spring Wheat
Pool C = $200.00/mt     $0.32/lbs N
N Rate(lbs/ac)Protein %Yield (bu/ac)Yield (mt/ac)Protein Premium ($/mt)Gross ($/ac) N Cost $/acGross Less N Costs
0n/a27.00.7 $147$0.00$147
40n/a32.00.9 $174$12.80$161
70n/a38.01.0 $207$22.40$184
100n/a46.01.3 $250$32.00$218
Average 35.8 

Note: the above results are from only 1 year. In 2003, the high rate was the most economic return to nitrogen (MERN) in each of these plots. In the two Hard Red Winter Wheat plots, the maximum protein premium was achieved at the 70 lbs N/acre rate.

Thank you to the project co-operators for their time and effort invested in the project and to Jason Webb, with Campbellford Farm Supply, who assisted with the co-operators and collecting the data.