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Effect of Planting Date and Variety Maturity on Soybean Yield

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Objectives

  • Determine the effect of planting date on soybean growth and yield for a range of soybean variety maturities.
  • Determine if there is merit to changing to a different maturity soybean variety when planting is delayed.

Study Description

Location:   Westfield, Mass.
Location - Research Trial - Effect of Planting Date and Variety Maturity on Soybean Yield
Planting Dates:   Normal (May 10)   
Late (June 20)
Pioneer® brand soybeans
Variety / Brand1:   P22T41R2 (RR2Y)
P33T72R (RR)
P38T81R2 (RR2Y)
  • The study originally included 3 planting dates as well as 0.8 and 1.3 maturity soybean varieties; however, the earliest planting experienced severe deer damage to the earlier varieties and early frost in the fall eliminated the late (July 25) planting.
  • Consequently, the final analysis was limited to comparing yield of full-season soybean varieties planted at a normal timing versus later in the planting season.

 

Results

Effect of planting date on soybean yield.

Figure 1. Effect of planting date on soybean yield.

  • Average yield of late-planted soybean was 11.9 bu/acre less than that of soybean planted at the normal timing (Figure 1).
  • Results were similar among the 3 varieties tested (Figure 2).
  • Soybean plants with a delayed planting date exhibited a shorter stature (Figure 3).
  • These results show that timely planting of an adapted variety is an important factor in maximizing yield potential.
Soybean planting date trial near Westfield, Mass.

Soybean planting date trial near Westfield, Mass.

 

Effect of variety maturity at normal and later planting dates on soybean yield.

Figure 2. Effect of variety maturity at normal and later planting dates on soybean yield.

 

Normal and late planting date by soybean variety.

Figure 3. Normal (left) and late (right) planting date by variety.

¹All Pioneer products are varieties unless designated with LL, in which case some are brands. 2014 data are based on average of all comparisons made at one location through 11/14/14. Multi-year and multi-location is a better predictor of future performance. Do not use these or any other data from a limited number of trials as a significant factor in product selection. The foregoing is provided for informational use only. Please contact your Pioneer sales professional for information and suggestions specific to your operation. Product responses are variable and subject to a variety of environmental, disease, and pest pressures. Individual results may vary. RR - Contains the Roundup Ready® gene.

   

Always follow grain marketing, stewardship practices and pesticide label directions. Varieties with the Glyphosate Tolerant trait (including those designated by the letter “R” in the product number) contain genes that confer tolerance to glyphosate herbicides. Glyphosate herbicides will kill crops that are not tolerant to glyphosate.


Always follow grain marketing, stewardship practices and pesticide label directions. Varieties with the Genuity® Roundup Ready 2 Yield® (RR2Y) trait contain genes that confer tolerance to glyphosate, the active ingredient in Roundup® brand agricultural herbicides. Roundup® brand agricultural herbicides will kill crops that are not tolerant to glyphosate. Genuity®, Roundup® and Roundup Ready 2 Yield® are registered trademarks of Monsanto Technology LLC used under license. Individual results may vary, and performance may vary from location to location and from year to year. This result may not be an indicator of results you may obtain as local growing, soil and weather conditions may vary. Growers should evaluate data from multiple locations and years whenever possible.
ALWAYS READ AND FOLLOW PESTICIDE LABEL DIRECTIONS. Roundup Ready® crops contain genes that confer tolerance to glyphosate, the active ingredient in Roundup® brand agricultural herbicides. Roundup® brand agricultural herbicides will kill crops that are not tolerant to glyphosate.
Pioneer is a member of Excellence Through Stewardship® (ETS).
Pioneer is a member of Excellence Through Stewardship® (ETS). Pioneer products are commercialized in accordance with ETS Product Launch Stewardship Guidance and in compliance with the Pioneer policies regarding stewardship of those products. Crops and materials containing biotech traits may only be exported to or used, processed, or sold in jurisdictions where all necessary regulatory approvals have been granted for those crops and materials. It is a violation of national and international laws to move materials containing biotech traits across borders into jurisdictions where their import is not permitted. Growers should discuss these issues with their purchaser or grain handler to confirm the purchaser or handler's position on products being purchased. Excellence Through Stewardship® is a registered trademark of the Biotechnology Industry Organization.