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| Matt, I find it hard to believe that grains can be grown to any sufficient level lower than a pH of 5 no matter what your topsoil is like. Zinc really gets tied up over 7.5. However, the macros are fine up to 7.5. Phos starts to get tied up below 6.2; Nitro and Potash at 5.7. The nutrient availabilty charts do not have an asterisk attached for differences in geography. They are pretty much a known fact. The problem I see with higher pH's (7.2 and higher) are carryover problems, mostly from soybean herbicides into corn.
Here are your acceptable ranges for crops you listed:
Wheat 6.0 - 7.0
Soybeans 6.0 - 7.5
Corn 6.0 - 7.0
Milo 5.5 - 7.0
BLUEBERRIES 4.5 - 6.0
Bottom line: Lime wins over fertilizer when it comes to spending nutrient dollars.
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Lime application
