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Corrective rate — base saturation method
V% method. Indicative estimate for the 0–20 cm layer.
How to calculate the corrective rate by base saturation
- 1
Gather the soil analysis. From the soil analysis, obtain the current base saturation (V%) and set the target V% (the crop's goal).
- 2
Enter CEC and PRNT. Enter the soil's CEC (T) and the neutralizing value (PRNT) of the corrective (calcium & magnesium carbonate) you intend to use.
- 3
Compute the base requirement. The lime requirement for a 100%-PRNT amendment is LR = (V2 − V1) × CEC ÷ 100.
- 4
Adjust for product quality. Adjust for the corrective's quality: rate (t/ha) = LR × 100 ÷ PRNT.
- 5
Multiply by the area. Multiply the per-hectare rate by the total area to get the amount of corrective needed.
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