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.
Start with the fine-earth fractions reported by your soil test: the USDA Soil Texture Triangle Calculator identifies a textural class, while measured water properties remain necessary for irrigation decisions. 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. Before purchasing, compare product offers with the Fertilizer Cost per Unit Nutrient Calculator on the same nutrient basis.
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 after creating a balanced recipe with the Compost Carbon-to-Nitrogen Ratio Calculator. Then model year-by-year organic matter trajectories using first-order decay kinetics. For greenhouse or injector delivery, the Fertigation Injector & Stock Tank Calculator keeps selected-nutrient ppm, source-water assumptions and the injector ratio separate from a field nutrient-rate plan.
Browse the task groupings below for guided workflows, or explore the full registry-derived soil and fertilizer collection. Each calculator page includes worked examples, method explanations, and links to in-depth guides.
Common Soil & Fertilizer Tasks
Understand Your Soil Texture
Classify fine-earth sand, silt and clay fractions on the USDA texture triangle before using texture as one input to field and irrigation decisions.
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
Build a compost recipe first, then plan field application from nitrogen availability and model long-term organic matter trajectories from cover crop and compost inputs.
Compare Fertilizer Value
Compare product offers by the selected N, P₂O₅ or K₂O nutrient cost before choosing a product for your field nutrient plan.
All Soil & Fertilizer Calculators
Fertilizer Rate Converter
Convert fertilizer application rates between lb/acre and kg/ha with nutrient breakdown and elemental equivalents
NPK Fertilizer Calculator
Calculate fertilizer product quantities to meet target N-P-K rates with multi-product blending and over-application warnings
Lime Requirement Calculator
Calculate agricultural lime requirement using SMP, Adams-Evans, or Mehlich buffer methods with CCE adjustment
Gypsum Requirement Calculator
Calculate gypsum amendment rate for sodic soil reclamation from ESP or SAR, CEC, and soil properties
Compost Application Rate Calculator
Calculate compost application rate from target nitrogen, compost properties, and first-year availability factor
SOM Build Plan Calculator
Model year-by-year soil organic matter trajectory from cover crop and compost inputs with first-order decay kinetics
Micronutrient Dosing Calculator
Calculate micronutrient product quantities with safety warnings for iron, zinc, boron, manganese, and copper
USDA Soil Texture Triangle Calculator
Find the USDA textural class from fine-earth sand, silt and clay percentages, with a missing-fraction helper and explicitly approved rounding normalization.
Compost Carbon-to-Nitrogen Ratio Calculator
Calculate a wet-mass-corrected compost mixture C:N ratio, moisture and each ingredient’s dry carbon and nitrogen contributions.
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.
Soil Texture Triangle and Irrigation
Use fine-earth sand, silt and clay fractions to identify a USDA texture class, then pair that result with measured water properties for irrigation planning.
Compost Carbon and Nitrogen Balance
Correct wet ingredients to dry mass, total their carbon and nitrogen contributions, and use a compost recipe C:N result without treating it as a maturity or application-rate prediction.
Connected Purchase & Fertigation Guides
These companion guides keep product-value comparison and injector mixing in their canonical Farm Economics and Greenhouse collections while linking the next planning decision here.
Fertilizer Cost Versus Nutrient Value
Compare fertilizer offers on a common N, P₂O₅ or K₂O mass basis while keeping oxide labels, secondary nutrients and over-application limits visible.
Greenhouse Fertigation Stock Tank Mixing
Calculate a selected nutrient concentration through a stock injector, document source-water assumptions, and verify the real mixture against labels and calibration.
Frequently Asked Questions
Continue Your Planning
Irrigation & Water Calculators
Coordinate nutrient management with irrigation scheduling
Crop Planning Calculators
Align fertilizer timing with planting and rotation plans
Farm Economics Calculators
Compare nutrient purchase costs with the crop budgets they affect
Greenhouse Calculators
Manage fertigation and growing media in controlled environments