2017 Organic Corn Performance Trial

Curt Reese and Brad Heins, WCROC

December 2017

This trial was conducted at two sites, one at the West Central Research and Outreach Center (WCROC), Morris, and the other at the Southwest Research and Outreach Center, Lamberton, MN.  At each location, there were two plots: one managed by organic practices and the other was in conventional production.  The Morris conventional trial was corn during 2016 and received 150-60-0-15 of fertilizer in the fall 2016.  The organic trial was planted with alfalfa for two years and liquid swine manure was applied in the fall of 2016.  Weed control was excellent at the Morris organic site; no differences in population were noted between plots.  Weed control methods for the organic test at Morris included one pass of a flex tine harrow at three inch corn followed by one pass of row cultivation.  Weed control methods for the organic test at Lamberton were two passes of a rotary hoe followed by one pass of row cultivation and hand weeding  No fertilizer was applied to the conventional trial at Lamberton.  No lodging or ear dropping were noted at either the Morris or Lamberton sites. 

Plots were four rows wide and 30 inch spacing with a seeding rate of 35,000 seeds per acre at all locations.  The Morris organic trial was planted May 30, 2017 and the conventional was planted June 2, 2017.  The organic trial was harvested November 3, 2017 and the conventional trail was harvested October 27, 2017.   

The Lamberton trials were planted on May 16 and harvested on November 1, 2017.  

Each trial was a randomized complete block test with three replications.  Data was analyzed by using Statistx version 10 software.

Morris Organic Trial

The ANOVA P value for yield was .034 and a LSD of .1 is reported.  LSD .1=14.5 bu/acre

Morris Organic Corn Trial 2017

Morris Conventional Trial

The ANOVA P value for yield was..02 and a LSD of .1 is reported * LSD .1=21.0bu/acre

Morris Conventional Corn Trial 2017

Lamberton Organic Trial

The ANOVA P value for yield was .0041 and an LSD of .1 is reported.  LSD .1=26.4 bu/acre

Lamberton Organic Corn Trial 2017

Lamberton Conventional Trial

The ANOVA P value for yield was .07 and a LSD of .1 is reported * LSD .1=18.3 bu/acre

Lamberton Conventional Corn Trial 2017

The WCROC would like to thank Albert Lea Seed and Blue River Hybrids for support of this project.  We also thank Steve Quiring, Joel Ekberg, and Daniel Nelson for technical support of this project.  View our 2016 corn trial results.