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Rick KochenowerOPREC
Oklahoma State University
Higher rainfall regions may see more benefit Timing of strip till will influence in panhandle
Warmer soils when planting in cool soils Better early season growth Benefit of clean seeding area when
compared to no-till Allow for use of AA fertilizer Fertilizer placement Double crop after grazing wheat? When it is dry, can always get moisture to
plant Break up plow pan with deep ripping
5053565962656871747780
4/25/2003 5/5/2003 5/15/2003 5/25/2003
Deg
rees
F
Strip-tillNo-till
404346495255586164677073
4/28/2004 5/3/2004 5/8/2004 5/13/2004 5/18/2004 5/23/2004
De
gre
es
F
Strip-tillNo-till
One location 41 bu/ac yield increase for strip-till when compared to no-till◦ May have been due to decreased stand for no-till◦ 22,600 plants/ac for strip-till compared to 17,400
for no-till No difference observed at two other locations
Treatment Grain Yield (bu/ac)Strip-till 130 lbs N 123.7
No-till 75 lbs N 121.7No-till 130 lbs N 120.0Strip-till 75 lbs N 118.7
No-till 0 lbs N 111.2Mean 119.1C.V. 12.9
L.S.D. 23.7
Grain Sorghum yields for three tillage practices at OPREC
Year2003 2004 2005 2006 2007
Yield
(bu/
ac)
20
30
40
50
60
70
80
No-till Conventional Strip-till
Timing 2004
No-till 62.5
Fall 45.5
Spring 47.6
Mean 51.9
CV % 15.6
L.S.D NS
2005
81.7
77.6
66.9
75.4
9.8
NS
2006
80.1
54.1
56.6
63.6
15.9
23.0
3-year
74.8
59.1
57.9
63.9
19.0
12.1
Results have been mixed Good intermediate step for a producer that
doesn’t want to jump into no-till Allows for use of cheaper N fertilizer Timing in area will be most important impact If you have shallow plow plan can break
without deep ripping
Dr. Chad Godsey and Randy Taylor Roger Gribble Orthman manufacturing Oklahoma Grain Sorghum Commission
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