YielixManage Nutrients, Correct pH, and Build Soil Health
Healthy soil is the foundation of productive agriculture. These calculators help you make data-driven decisions about what to apply, how much, and when — starting from your soil test results and working through to field-ready application rates.
If your soil test shows nutrient deficiencies, use the NPK Calculator to determine exactly how much fertilizer product to apply for your target N-P-K rates. Need to convert between metric and imperial units? The Fertilizer Rate Converter handles lb/acre to kg/ha conversions with full nutrient breakdowns. For trace elements, the Micronutrient Dosing calculator calculates safe application rates for iron, zinc, boron, manganese, and copper with toxicity warnings.
When pH correction is needed, the Lime Requirement calculator supports SMP, Adams-Evans, and Mehlich buffer methods with CCE adjustment, while the Gypsum Requirement calculator addresses sodic soil reclamation from ESP or SAR values. For long-term soil health, plan compost applications and model year-by-year organic matter trajectories using first-order decay kinetics.
Browse the task groupings below for guided workflows, or explore the full set of seven soil and fertilizer calculators. Each calculator page includes worked examples, method explanations, and links to in-depth guides.
Common Soil & Fertilizer Tasks
Calculate Fertilizer Rates and Blends
Determine the right product quantities to meet target N-P-K rates, convert between lb/acre and kg/ha, and dose micronutrients safely.
Correct Soil pH and Structure
Calculate lime application rates from buffer pH methods, or determine gypsum requirements for sodic soil reclamation.
Build Soil Organic Matter
Plan compost applications based on nitrogen availability, and model long-term soil organic matter trajectories from cover crop and compost inputs.
All Soil & Fertilizer Calculators
Convert fertilizer application rates between lb/acre and kg/ha with nutrient breakdown and elemental equivalents
Calculate fertilizer product quantities to meet target N-P-K rates with multi-product blending and over-application warnings
Calculate agricultural lime requirement using SMP, Adams-Evans, or Mehlich buffer methods with CCE adjustment
Calculate gypsum amendment rate for sodic soil reclamation from ESP or SAR, CEC, and soil properties
Calculate compost application rate from target nitrogen, compost properties, and first-year availability factor
Model year-by-year soil organic matter trajectory from cover crop and compost inputs with first-order decay kinetics
Calculate micronutrient product quantities with safety warnings for iron, zinc, boron, manganese, and copper
Soil & Fertilizer Guides
Understanding NPK Fertilizer Labels
Decode fertilizer bag labels, convert between oxide and elemental forms, and calculate how much product you need for your field.
How to Correct Soil pH with Lime
Understand buffer pH methods, CCE adjustments, and how to calculate the right lime application rate for your soil.
Building Soil Organic Matter
Learn how cover crops, compost, and reduced tillage work together to build soil organic matter over time.