Corn Silage Row Width Study


  • Evaluate corn silage yield and starch content responses to narrow-row configurations.
  • Determine if there are hybrid interactions among different row widths.

Study Description


Plot Size: >0.5 acres
Row Widths: 15 inches vs. 30 inches
Twin (7.5-inch on 30-inch centers) vs. 30-inch
Replicates: 3
Locations: 4 (see map below)
Pioneer® Brand Hybrid:    P1376HR (HXX, LL, RR2) (BMR)
  P0210HR (HX1, LL, RR2)
  P1498HR (HX1, LL, RR2)
  34A89 (HXX, LL, RR2)

Key Points

  • Yield and quality responses appear to be hybrid-dependent.
  • Plant population was not a factor in this experiment, further research is needed to evaluate interactions of row width and population.



  • Though not statistically different, P1376XR had incrementally greater yield in 15-inch row spacing compared to 30-inch rows, with a yield advantage of 1.2 tons/acre.
  • P1376XR in 30-inch rows demonstrated a 2.3 ton/acre yield advantage when compared to twin rows.
  • P1498HR demonstrated a significant 1.8 ton advantage in 30-inch rows when compared to twin rows (P=0.04).
  • Starch differences among row widths were not significant.


HX1 - Contains the Herculex® I Insect Protection gene which provides protection against European corn borer, southwestern corn borer, black cutworm, fall armyworm, lesser corn stalk borer, southern corn stalk borer, and sugarcane borer; and suppresses corn earworm.
HXX - Herculex® XTRA contains both the Herculex I and Herculex RW genes.
Herculex® Insect Protection technology by Dow AgroSciences and Pioneer Hi-Bred. Herculex® and the HX logo are registered trademarks of Dow AgroSciences LLC.

RR2 - Contains the Roundup Ready® Corn 2 trait that provides safety for over-the-top applications of labeled glyphosate herbicides when applied to label directions.
Roundup Ready® is a registered trademark used under license from Monsanto Company.

LL - Contains the LibertyLink® gene for resistance to Liberty® herbicide.
Liberty®, LibertyLink® and the Water Droplet Design are trademarks of Bayer.

PIONEER® brand products are provided subject to the terms and conditions of purchase which are part of the labeling and purchase documents.

Product responses are variable and subject to many factors including soil type, management practices and environmental stress as well as disease and pest pressures. Individual results may vary.