Soil Science
Soil science calculators for texture analysis, CEC, pH amendment, organic matter, erosion estimation, and nutrient balance.
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CEC Calculator
Calculate Cation Exchange Capacity and base saturation from clay content, organic matter, and exchangeable cation levels. Evaluate nutrient retention capacity.
Cover Crop Nitrogen Credit
Estimate nitrogen credit from cover crops based on species, biomass production, and termination timing. Calculate fertilizer replacement value.
Infiltration Rate Calculator
Calculate soil infiltration rate using Horton's equation. Determine average rate, total infiltration, and runoff potential from field measurements.
Nutrient Balance Calculator
Calculate nitrogen, phosphorus, and potassium surplus or deficit by comparing fertilizer and manure inputs against crop removal rates.
Organic Matter Calculator
Calculate compost needed to raise soil organic matter, with estimates for water holding capacity improvement, CEC boost, and nitrogen mineralization.
Salt Index Calculator
Look up the salt index for common fertilizers and calculate the salt effect at your application rate. Assess seedling injury risk and placement recommendations.
Soil Compaction Assessment
Assess soil compaction severity from penetrometer readings. Accounts for soil moisture, depth, and crop-specific root restriction thresholds.
Soil Erosion (RUSLE)
Calculate soil erosion using the Revised Universal Soil Loss Equation (RUSLE). Enter R, K, LS, C, and P factors to estimate annual soil loss in tons per acre.
Soil pH Amendment
Calculate how much lime or elemental sulfur is needed per acre to adjust soil pH. Accounts for soil texture and buffer capacity.
Soil Texture Triangle
Classify soil texture using the USDA texture triangle from sand, silt, and clay percentages. Estimates drainage, water holding capacity, and permeability.