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201 - pH Balance

01 pH Balance Formulas

Written by Regan Heine

Updated at July 14th, 2025

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Running all pH-based lime formulas ensures you generate accurate, zone-specific lime rates tailored to each field’s soil acidity and buffering capacity. By using both soil pH and buffer pH layers—along with your ECCE, target pH, and minimum rate inputs—you can confidently recommend lime where it’s needed and avoid over-application where it’s not.

For best results, always double-check that:

All required variables are entered (ECCE, Target pH, Minimum Rate)

The correct soil layers are present and labeled properly

You’re using the appropriate formula for your desired lime product (e.g., ag lime vs. pelletized)

Need help interpreting results or customizing formulas? Reach out to your agronomy advisor or support team.

AMS for High pH, Element Sulfur for high pH

Uses most recent soil data to determine applicate rate. No variables in both, just set you min/max in prefs.

Both formulas aim on applying on acres where pH is above 7. If pH is below 7, the formula will output 0. 

 
 

Magnesium/Calcium Balance

No variables, just set you min/max in prefs. 

This formula uses granular K-Mag. Applies K-Mag to be in balance with your calcium level. 

 
 

Pell Lime to Custom % BS

Product : Pell Lime

Use : Spot treating low pH areas, or general quick fix low pH. 

Type Name Description
Variable Target BS % Ca The desired base saturation % for calcium (default: 68%)
Variable PellLime Ratio If using a blend, enter % of pell lime in blend (default: 100%)
Layer Soil BS Ca or Soil Ca % Current calcium base saturation from soil test (%)
Layer Soil Ca Mehlich 3 or Soil Ca Calcium level in ppm from soil test
 
 

Target pH Lime ECCE lbs/ton, Target pH Lime Percent ECCE

Customized Lime Application for Your Field

Our lime recommendation tool helps determine how much lime to apply to each zone of your field based on current soil conditions and your goals. We use your inputs, along with soil test data, to generate a precise lime rate (in tons/acre) — helping correct soil acidity and improve crop performance.

Input Source What It Means

ECCE (lbs/ton) or

Lime ECCE

You provide it The quality of the lime you're using. Higher ECCE = more effective lime. This is given out wherever you purchase lime. 
Target pH You provide it Your goal for soil pH (usually between 6.0 and 6.9 depending on crop type). 
Minimum Rate You provide it A safety-net application rate used when soils are extremely acidic. Default is set at 0.5 tons. This is different than the minimum rate located in the “prefs,” use this when using this formula.
Soil pH Soil test map Shows how acidic or basic the soil is today.
Buffer pH Soil test map Measures how resistant the soil is to changing pH — helps estimate how much lime is needed.
 
 

Target Mg% Build - K-Mag

Product : K-Mag

When to Use:

When magnesium base saturation is below target and interfering with nutrient balance

In soils with high calcium or potassium, which can suppress Mg uptake

To improve soil structure and water retention in sandy or light-textured soils

Type Name Description
Variable Target Mg % The desired magnesium base saturation percentage
Layer Soil Mg % or Soil BS Mg Current magnesium base saturation (%)
Layer Soil Mg or Soil Mg Mehlich 3 Current magnesium in ppm
 
 

 

 

 

 

 

 

equilibrium acid-base

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