Row Spacing 15” vs. 30” Rows –Previous Residue Removed (Medium Yield Zone 35-55 bu/ac)

Trial Type

Seeding Rate/ Varieties/ Row Spacing

General Stats

County
Kingsbury
Replications
3
Crop
Soybean
Seed Brand
Stine
Variety
20RD20
Relative Maturity
2.0
Tillage
No-till
Irrigated
No Value
Drain Tile
No Value
Previous Crop
Corn
Row Sapcing
30"
Plant Population
140000
Plant Date
09/05/2015
Cover Crop
No Value
Seed Treatment
Fungicide, Insecticide, Inoculant

Soil Stats

Soil Type
Fine
Soil pH
4.0
Organic Matter
No Value

Methodology

Methods and Agronomic Information

The variety Stine 20RD20, was no-tilled in 30” rows on 5/9/15 at 140,000 seeds ac-1.  The four treatment strips were 15” rows that were created by double-planting at the same seeding rate per acre (Figure 1).  The field received approx. 13.4 in. of rain from June 1 through August 31.

Results

Results

On average, the 15” rows yielded 3 bu ac-1 less than the estimated yield of those same strips if they would have been 30” rows (Table 2).  This estimate was calculated from data surrounding both sides of each strip.  These findings contradict results from East half of the field, where stover from the previous corn crop was returned, and there was no yield difference between the 15” and 30” rows.   Another nearby trial in 2015 where previous corn stover was also returned, showed no significant yield difference between 15” and 30” row spacings as well.  On-farm row spacing trials comparing previous residue management practices may be of interest in the future.

Rainfall

Temperature

Applications

Fertilizer Applications

Insecticide Applications

Fungicide Applications

Herbicide Applications