Increased Seeding Rate (160K to 200K) ( Medium Yield Zone, <35 bu/A)

Trial Type

Seeding Rate/ Varieties/ Row Spacing

General Stats

County
Brown
Replications
1
Crop
Soybean
Seed Brand
No Value
Variety
No Value
Relative Maturity
1.4
Tillage
No-till
Irrigated
No Value
Drain Tile
No Value
Previous Crop
Soybean
Row Sapcing
30"
Plant Population
200000
Plant Date
10/05/2016
Cover Crop
No Value
Seed Treatment
Fungicide, Insecticide, Inoculant

Soil Stats

Soil Type
Fine
Soil pH
4.0
Organic Matter
No Value

Methodology

Treatment Information
The field was seeded at 160,000 seeds ac-1 except for four
treatment strips each seeded at 200,000 seeds ac-1.

Agronomic Information and Weather
Soybeans with a 1.4 maturity rating were no-tilled in 30” rows on
May 10. The previous crop was soybeans. Seed was treated with
insecticide, fungicide, and a B.japonicum inoculant. The field
received approx. 7.79 in. of rain and accumulated 1739 GDDs
from June 1 through August 31. This was drier and similar to the
average of 9.15 in. and 1715 GDDs.

Results

Results
On average, increasing the seeding rate from 160,000 to 200,000
seeds ac-1 did not affect yields. However, on several summit
areas, the seeding rate increase appeared beneficial. Evidence
from a 2016 on-farm trial in Brookings Co. had similar findings on
the summit positions. Additional trials with variable seeding rates
are needed in 2017.

Rainfall

Temperature

Applications

Fertilizer Applications

Insecticide Applications

Fungicide Applications

Herbicide Applications