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The importance of soil pH.
     Soil pH has a major impact on nutrient availability.  Soil pH that is too high or too low can seriously affect your yields.
 
 Crop  Ideal pH  Preferred Range
 Corn  6.8  6.0 to 7.0
 Soybeans  6.8  6.0 to 7.5
 Wheat  6.8  6.0 to 7.0
 Alfalfa  7.0  6.0 to 7.5


Availability of soil nutrients to a plant decrease as the width of the bar decreases.  Soil pH is a key factor in regulating nutrient supply.  Therefore, N-Rich should be used as an insurance program against possible trace element deficiencies when aiming for high yields.

ws--pH-scale 
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ws---planting






Relative (%) Yield At Different pH Levels

Crop 

 pH 4.7

 pH 5.0

 pH 5.7

 pH 6.8

 pH 7.5

 Corn

 34

 73

 83

 100

 85

 Soybeans

 65

 79

 80

 100

 93

 Wheat

 68

 76

 89

 100

 85

 Alfalfa

 2

 9

 42

 100

 100



Soil pH effect on Corn.
     *If a soil pH of 5.0 gives 73% of a potential 200 bu/A corn crop, that represents a 54 bu/A loss of genetic yield potential.

Soil pH effect on Soybeans.
     *If a soil pH of 5.0 gives 79% of a potential 50 bu/A soybean crop, that represents a 10.5 bu/A loss of genetic yield potential.
 
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