Canola Seeding Rate 2013 (Sample)

 

icon_details  Details:

  • Year - 2013
  • Variety - 5440
  • Seeding Date - May 22, 2013
  • Fertility - 125-35-0-15
  • Seeding Rates (lbs/ac) - 2.5, 4.0, 5.5
  • Replicates - 4

icon_notes  Notes:

  • Experiment used a randomized complete block design
  • TKW of Canola seed was 5.0 g with germination rate of 95%
  • Mortality was 16%
  • Plant counts between the treatments are significantly different
  • Yields of the 4 lbs/ac and 5.5 lbs/ac treatments are not significantly different
  • Yield of the 2.5 lbs/ac treatment is significantly different from 4 lbs/ac and 5.5 lbs/ac.

icon_data3  Yield Data:

2.5 lbs/ac (B) 59.5 bu/ac
4.0 lbs/ac (A) 63.1 bu/ac
5.5 lbs/ac (A) 63.7 bu/ac

CV = 2.1    LSD = 2.2

Seeding rates followed by the same letter are not significantly different.

icon_economic  Economic Analysis:

2.5 lbs/ac 4.0 lbs/ac 5.5 lbs/ac
Yield (bu/ac) 59.5 63.1 63.7
Price ($/bu) $11.00 $11.00 $11.00
Treatment Cost ($/ac) $27.50 $44.00 $60.50
Gross Revenue ($/ac) $627.00 $650.10 $640.20

icon_plantgrowth  Plant Counts:

2.5 lbs/ac

4.4
Plants / ft²

4.0 lbs/ac

6.9
Plants / ft²

5.5 lbs/ac

9.2
Plants / ft²

CV = 11.4    LSD = 1.4

icon_discussion  Discussion:

Our mortality rates were a little higher in 2013 and our seed was larger, which left us with lower plant counts than the first year of our trial.  In 2013 the lower seeding rate of 2.5 lbs/ac only produced 4.4 plants/ft².  Yields at this rate were still impressive at around 60 bu/ac, but we did not achieve Maximum Economic Yield at 2.5 lbs/ac in 2013, instead we did at 4.0 lbs/ac or 6 plants/ft².  As was the case in 2012, we ended up with more second flush weeds in the lower seeding rate treatments; the weeds consisted of wild buckwheat, redroot pigweed and cleavers.  Dockage for the three seeding rates were 2.3% (2.5 lbs/ac), 1.5% (4.0 lbs/ac) and 1.2% (5.5 lbs/ac), with the differences being a result of more weed seeds in our sample at the lower seeding rates.  In our opinion, all three treatments should have received a second application of Liberty.

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