Observations from the 2009 and 2010 Crop years
• Moisture at and 15 days after planting: Drier 09 stand was
dramatically effected, Wetter 2010 little effect
-1.11E-15
0.3
0.6
0.9
1.2
3.5 4.5 5.5 6.5 7.5
Re
lati
ve
Yie
ld
Soil pH
More InformationWebsites:
www.soiltesting.okstate.edu
www.npk.okstate.edu
Publications:F-2239: Cause and Effects of Acidity
PT 2003-08: Liming Acid Soils, What to expect
PT 2002-15: The Risk of Not Liming
Contacts:Brian Arnall
[email protected]
twitter @OSU_NPK
Hailin Zhang
[email protected]
Wetter 2010 little effect
• Once crop is established (knee high) visual difference in mid
range pH (4.5-5.0) were reduced. Only top 4-6 inches of the soil
profile was acidified.
•Heading was delayed by as much as 7 days in low pH
plots.•Residual weed control negatively effected by
acidity.•Visually, heat and drought tolerance reduced by
acidity.
Relative Yield (RY) of grain sorghum across pH at Lahoma and
Perkins.
RY equals (plot yield/ max yield) of site. Max yield was 50 and
70 bu/ac at
Lahoma and Perkins respectively.
