Acidity/Alkalinity of Fertilizer Materials

Acidity/Alkalinity of Fertilizer Materials

In terms of CaCO3 (pure lime) per 100# of material
MATERIAL ACIDITY
Ammonium Nitrate -60
Ammonium Sulfate -110
Animal Tankage +10
Basic Slag +70
Bone Meal +20
Calcitic Lime (ground) +98
Calcium Nitrate +20
Cottonseed Meal -9
Dolomitic Lime (ground) +100
Dried Blood -22
Epsom Salt (MgSO4) 0
Fish Scraps -8
Gypsum (CaSO4) 0
Magnesium Oxide +250
MAP | DAP -65 | -70
Phosphate Rock +10
Potassium Magnesium Sulfate 0
Potassium Nitrate +26
Potassium Sulfate 0
Sodium Nitrate +29
Sulfur -218
Sulfur coated Urea -118
Urea -84
Wood Ash +60

For example, 9 lbs of pure lime would be required to neutralize the acidity created by 100-lbs of cotton seed meal. Positive values indicate the ability to neutralize acidity.

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