Ohio State University Research/Extension Bulletin

Agronomic Crops Team On-Farm Research Projects 1997

Special Circular 160-98

APPENDIX

Seeding and Nitrogen Rate Effects on Wheat Yield

Objective

To demonstrate possible effects of two seeding rates combined with two fertilizer rates on wheat yield.

Cooperator:Dennis Baker
County of Site:Darke
Nearest Town:Greenville
Major Soil Type:Miami
Drainage:Subsurface
Irrigation:None
Tillage:No-till
Previous Crop:Soybeans
Soil Test:pH 6.6
P 56
K 284
Fertilizer:10/2/96 - 100# 18-46-0 & 100# 0-0-60
Topdress on 4/11/97 using 46-0-0
Herbicide:2 qt/ac Hi-Dep on 5/16/97
Variety:Freedom
Planting Date:10/15/96
Harvest Date:7/16/97

Materials and Methods

Two replications were planted using 60 lb/A and 120 lb/A seeding rates in combination with 75 lb/A and 125 lb/A nitrogen top-dress rates. Plots were harvested with like replications together.

Results

Seeding RateNitrogen RateYield
60 lb/A75 lb/A47.7 bu./A
60 lb/A125 lb/A56.4 bu./A
120 lb/A125 lb/A63.8 bu./A
120 lb/A75 lb/A52.9 bu./A

Summary and Notes

Nitrogen was applied in the form of urea in early April. It appears that some of the nitrogen was lost, since the lower yields were on those plots where a "normal" rate of topdress N was applied.

Submitted by:
Dennis Baker
Ohio State University Extension - Darke County
700 Wayne St.
Greenville, OH 45331
937-548-5215
baker.5@osu.edu

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