Chris Bruynis, Extension Agriculture and Natural Resources Agent
Objective: The objective of this study was to compare soybean yield response among two different manganese sources and not adding manganese.
Background |
|
| Cooperator:
Site: Nearest Town: Major Soil Type: Drainage: Irrigation: Tillage: Previous Crop: Variety: Soil Test: |
Bob Buckland
Wyandot County Carey Blount, Lykins No Tile None No-Till Corn pH 7.6 P 53 lbs/ac K 219 lbs/ac |
| Organic Matter:
Fertilizer: Herbicide: Planting Population: Planting Date: Spraying Date: Harvest Date: |
3.0%
0-0-60 100# Round-Up Ultra 215,000 May 8, 1999 June 24, 1999 October 2, 1999 |
Two different manganese sources, Tech-Mag and Tracite 10% Mn, were applied to the replicated plots. Tech-mag was applied at the rate of 8 pounds per acre and Tricite was applied at one quart per acre. The field strips were sprayed with a 45-foot sprayer with the center 25 feet being harvested from each strip. The field was sprayed with Round-Up Ultra one week prior to the Mn application to eliminate any potential antagonism between the Mn sources and the herbicide. Yields were determined by weigh wagon.
| Treatment | Yield(bu/ac |
| Untreated | 39.58 |
| Tracite 10% Mn | 38.85 |
| Tech-Mag | 39.98 |
| lsd (0.05) | 3.02 NS |
F <1 indicating no significant differences among treatment means. CV = 5.77%
Many fields in Wyandot County have relatively high pH levels, resulting in soybean crops showing symptoms of manganese deficiencies. Yield differences between the treatments were not statistically different at the 95 percent confidence level. Visually, there was an immediate response to the Mn with the treated soybeans changing from a pale yellow color to a dark green. The inability of the beans to respond to the Mn application by increased yields could have been due to the abnormally dry weather experienced during the growing season. Additional research needs to be done to clarify the use of manganese in high pH soils and the returns to the producer.
The weigh wagon was provided by Riele Farms, Pioneer Dealer, Upper Sandusky.
For more information, contact:
Ohio State University Extension, Wyandot County
109 South Sandusky Ave. Room 16
Upper Sandusky, OH 43351
419-294-4931
bruynis.1@osu.edu