Managing Soybean for High Yield


  • Desire for higher soybean yield has produced considerable interest in utilizing additional management practices that may increase yield.


  • Identify cropping management practices that improve soybean yield.
  • Determine interactions between geography, weather, varieties and cropping management on yield.

Study Description

The following strips/treatments were implemented at 25 sites in 2011 and 30 in 2012 (see map below):

  • Strip 1 = Untreated seed
  • Strip 2 = PPST (Pioneer Premium Seed Treatment)
  • Strip 3 = PPST + foliar fungicide and insecticide
  • Strip 4 = PPST + foliar fungicide and insecticide + nitrogen fertilizer
research location map

Treatment Details

  • PPST (ST): Pioneer Premium Seed Treatment includes imidacloprid insecticide, trifloxystrobin and metalaxyl fungicides, and a rhizobia inoculant.
  • Foliar (Fol): Foliar-applied fungicides and insecticides were selected by individual growers and applied at labeled rates at the R3 growth stage.
  • Nitrogen (N): 100 lb N per acre was sidedressed; most applications were made at full flower (R2).


  • The overall yield was very high, averaging 65 bu/acre.
  • Soybean yield with each treatment differed significantly (p < 0.03) when compared to any of the other 3 treatments.
  • ST increased yield 1.1 bu/acre when compared to the untreated control.
  • ST+Fol increased yield 1.7 bu/acre when compared to ST.
  • ST+Fol+N increased yield 1.1 bu/acre when compared to ST+Fol.
    • The N response was 0.40 bu/acre for short-season (
    • The N response was 2.1 bu/acre for full-season (>3 MG) varieties.
  • The response to ST and Fol were nearly identical for both short and full-season varieties.
influence of seed treatment on yield
Influence of seed treatment (ST), seed treatment + foliar fungicide and
insecticide (ST+Fol), or seed treatment + foliar + nitrogen fertilizer (ST+Fol+N)
on the seed yield of soybean grown at 25 locations in 2011 and 30 in 2012. 
All treatment comparisons are significantly different (p < 0.03).

Related Content

Back to Trials

   PIONEER® brand products are provided subject to the terms and conditions of purchase which are part of the labeling and purchase documents. 2012 data are based on average of all comparisons made in 55 locations through November 19, 2012. 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. Product responses are variable and subject to a variety of environmental, disease and pest pressures. Individual results may vary. Pioneer Premium Seed Treatment for soybeans is applied at a DuPont Pioneer production facility or by an independent sales representative of Pioneer. Not all sales representatives offer treatment services, and costs and other charges may vary. See your Pioneer sales representative for details.