Late Season Nitrogen Application (Site 2)

Trial Type

N Fertilizer, Medium Yield

General Stats

County
Lincoln
Replications
6
Crop
Soybean
Seed Brand
No Value
Variety
S26P3
Relative Maturity
2.6
Tillage
Conventional Till
Irrigated
No Value
Drain Tile
No Value
Previous Crop
Corn
Row Sapcing
30"
Plant Population
140000
Plant Date
25/05/2018
Cover Crop
No Value
Seed Treatment
Fungicide, Inoculant

Soil Stats

Soil Type
Fine
Soil pH
4.0
Organic Matter
No Value

Methodology

Golden Harvest S26P3 maturity group 2.6 soybeans were planted on May 25, 2018 at 140,000 seeds/acre in 30 inch rows.  Factor® (urease inhibitor) coated Urea (46-0-0) was applied at 20 lbs-N/ac by a hand spreader on August 24th, 2018.  The small plots were harvested and weighed in a weigh wagon.

Results

The nitrogen fertilizer decreased yield by 1.21 bu/ac.  This yield decrease was not significantly different than the unfertilized controls (p=0.835).  High variance also was noticed (Table 1) between plots.  More research is required to determine if late season nitrogen application can increase yields.

 

 

Acknowledgements:

Funding for this research project was provided by the South Dakota Soybean Research and Promotion Council. The authors would also like to thank the soybean producers who participated in this project.

Rainfall

Temperature

Applications

Fertilizer Applications

Insecticide Applications

Fungicide Applications

Herbicide Applications