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

Questions