Row Spacing Effect on Yield of Wheat Varieties


  • Evaluate yield performance of new Pioneer® brand wheat varieties at 7.5-inch and 15-inch row widths.

Experimental Procedure

Plot layout: 10 ft by 78 ft
Replicates: 3
Locations: 1
Pioneer® varieties:      •  25R40
•  25R46
•  25R77
Planting Date: 10/18/2011
Harvest Date: 6/25/2012


Photo: wheat field

Wheat row spacing research study near Custar, Ohio; June 11, 2012.


Yield advantage of 7.5-inch vs. 15-inch row width

Yield advantage of 7.5-inch row width across all wheat varieties tested in 2010–2012

   Year      Yield Advantage  
   2010 12%
   2011 -3%
   2012 11%
   2010-12 Average   7%
  • All 3 varieties tested in 2012 had greater average yield in 7.5-inch row width than 15-inch row width.
  • Yield response to row width in 2012 was similar to results observed in 2010. 2011 was an unusual year in which 15-inch row width had greater yields than 7.5-inch row width.
  • 25R40 had the highest yield across both row widths. This is consistent with results from previous years in which the highest yielding variety in narrow rows was also highest in wider rows (25R47 in 2010 and 25R34 in 2011).
  • This study was conducted in collaboration with the Ohio State University, Northwest OARDC. Special thanks to Matt Davis, Station Manager.

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 one location through 6/25/12. 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.