The latest issue of Crop Insights from Pioneer Hi-Bred International Inc. looks at soybean yields in no-till vs. conventional fall-tillage systems.

A PDF of "Crop Insights, Influence of Tillage on Soybean Yield in the United States and Canada", may be downloaded at Crop Insights 49.

An extensive literature review was conducted on soybean
research that compared yields of no-tillage to conventional
fall-tillage systems in the United States and Canada.

In summary:

  • The trial results were mapped by region to look for geographic and environmental patterns in the relative performance of no-tillage versus conventional tillage on soybean yield.

  • The national average difference in soybean yield between no-tillage and conventional tillage was found to be negligible with a 0.7 percent advantage to no-till.

  • No-till tended to have greater yields than conventional tillage in the south and west regions. The two tillage systems had similar yields in the central United States, and no-till typically produced lower yields than conventional tillage in the northern United States and Canada.

  • No-till had greater soybean yields than conventional tillage on moderate- to well-drained soils, but slightly lower yields than conventional tillage on poorly drained soils.

  • Soybean yields tended to benefit more from crop rotation in no-till compared to continuous cropping.

  • Pioneer researchers have assigned a High Residue Suitability rating for all Pioneer(R) brand soybean varieties. The goal of this rating is to give customers guidance on selecting varieties suitable for high-residue tillage systems.

  • Pioneer said its next Crop Insights will investigate the response of corn grain yield to no-till versus conventional tillage.

    SOURCE: Pioneer Hi-Bred International news release.