Nitrogen Placement eFields Collaborating Farm
STUDY INFORMATION Planting Date
6/1/17
Harvest Date
10/17/17
Variety
P0825 AM
Population
34,000
Acres
10
Treatments
4
Reps
4
Treatment Width
40 ft.
Tillage
No-Till
Management
N/A
Previous Crop
Soybeans
Row Spacing
30 in.
Soil Type
Kokomo silty clay, 48% Strawn-Crosby complex, 52%
Clark County
Growing Season Weather Summary
OBSERVATIONS During the growing season, ample rain during the early growth stages provided a boost to growing crops. After the sidedress nitrogen application, a visual boost in crop vigor was observed equally for both the control (180 lb N) and the other treatments (100 lb N). This confirmed that there were no limiting factors in the crop prior to the late season application.
RESULTS Treatments (Placement)
OSU Extension
APR
MAY
JUN
JUL
AUG
SEP
Total
Precip (in.)
2.63
2.87
1.6
4.06
5.45
4.84
21.45
Cumulative GDDs
146
482
1163
1928
2704
3264
3264
SUMMARY •
The y-drop and late-season coulter treatments produced statistically significant higher yields when compared with the control and center of row treatments.
•
Conditions after the late-season application were persistently dry. This could explain the lack of nitrogen uptake for the surface applied systems.
Planting Application V10 Application (lbs N/ac) (lbs N/ac)
Moisture (%)
Yield (bu/ac)
Standard Practice
180
0
22.0
216 b
Coulter
100
80
22.2
233 b
Nutra-Boss
100
80
22.1
232 a
Center-drop
100
80
22.2
214 b
Treatment Means with the same letter are not significantly different according to Fisher’s Protected Least Significant Differences (LSD) test at alpha = 0.1.
54 | Ohio State Digital Ag Program
LSD: 7.86 CV: 2.71%