Roundup Ready 2 Xtend Soybeans Versus LibertyLink Soybeans - MN, OH, IN, KY

TRIAL OVERVIEW

Growers faced with challenging weed control problems due to herbicide tolerance are looking for new and improved weed control methods. The recent launch of the Roundup Ready® Xtend Crop System provides growers one of the most effective broadleaf weed control programs. A multi-state project was developed to compare Roundup Ready 2 Xtend® soybean and LibertyLink® trait platforms in a conventional herbicide system to focus solely on germplasm performance.

RESEARCH OBJECTIVE

The objective of this study is to compare soybean yields from Roundup Ready 2 Xtend soybean and LibertyLink soybean products. Field trials were conducted in a weed-free environment, thus eliminating weed control as a confounding factor.

Location Soil Tillage Type
Planting Date

Harvest Date

Planting
Rate/Acre
Angola, IN Silt Loam Convential 06/02/2017 11/01/2017 140,000
West Lafayette, IN Silty Clay Loam Conventional 05/17/2017 10/17/2017 140,000
New Richmond, IN Silty Clay Loam Conventional 06/02/2017 10/30/2017 140,000
Elwood, IN Silt Loam Conventional 05/31/2017 10/21/2017 140,000
Salem, IN Silt Clay No-Till 05/17/2017 10/06/2017 145,000
Owensboro, KY Silt Clay No-Till 05/11/2017 09/28/2017 145,000
Edwardsport,IN Silt Loam Conventional 05/19/2017 10/20/2017 140,000
Evansville, IN Silt Loam Conventional 05/16/2017 10/17/2017 140,000
Orrville, OH Loam No-Till 06/01/2017 10/19/2017 140,000
Martin, OH Silt Loam No-Till 06/01/2017 10/27/2017 140,000
Capac, MI Silt Loam Conventional 05/17/2017 10/05/2017 150,000
Mason, MI Sandy Loam Conventional 05/13/2017 11/10/2017 150,000
Westphalia, MI Loam Conventional 05/13/2017 10/01/2017 150,000
Cassopolis, MI Loam Conventional 05/15/2017 10/20/2017 150,000

SITE NOTES:

  • 14 testing locations in 2017: IN (7), MI (4), OH (2), KY (1).
  • Weed-free research trials were achieved using locally recommended herbicide programs. All plots at each location received the same herbicide treatments.
  • Trials were small plots with two or four replications.
  • Results were analyzed as a randomized complete block (RCB) design (alpha = 0.10).

UNDERSTANDING THE RESULTS


Figure 1. Multi-year average yield of Roundup Ready 2 Xtend® soybeans versus LibertyLink® soybeans. Data from 2016 includes 16 locations and 2017 data includes 14 locations across Michigan, Indiana, Kentucky, and Ohio. Yield means with the same letter are not significant at P = 0.10 (comparison made within testing year). 

  • Results illustrate higher yield potential of Roundup Ready 2 Xtend® soybean products when compared to older technologies such as LibertyLink® soybean products (Figure 1).
  • Superior yield results of Roundup Ready 2 Xtend® soybean products in this study do not include potential benefits of weed control from the Roundup Ready® Xtend Crop System.
  • Results in 2017 are consistent with findings of the study conducted in 2016 (Figure 1).
  • These results are consistent with other research studies comparing herbicide tolerant traits.

WHAT DOES THIS MEAN FOR YOUR FARM?

  • Roundup Ready Xtend soybean products had higher yield potential than LibertyLink soybean products.
  • By planting Roundup Ready Xtend soybean products and incorporating Roundup Ready PLUS® Crop Management Solutions, farmers can both maximize soybean yield potential and weed control.