Planting density optimization, fertilizer recommendations, yield forecasting, irrigation scheduling, GDD tracking, soil interpretation, lime requirements, and crop rotation analysis — powered by USDA NASS, ARS, and NRCS research data.
World Agricultural Supply and Demand Estimates — select a commodity to load the latest USDA production, ending stocks, and season-average price forecasts. Values auto-populate into price and yield fields below.
Model SF1-S.001
Calculate optimal seeding rate in seeds/acre and lbs/acre for any crop. Adjusts for germination rate, row spacing, and field conditions using USDA ARS calibrated population targets.
Model SF1-S.002
Generate nitrogen, phosphorus, and potassium recommendations from soil test results and yield goal. Integrates NRCS soil data with university extension fertilizer guidelines.
Model SF1-S.003
Track crop development stages using GDD accumulation. Identify current crop stage and days to maturity using USDA ARS calibrated base temperatures and phenological milestones.
Model SF1-S.004
Calculate crop water requirements and irrigation timing using reference ET and crop coefficients. Based on the USDA ARS AZSCHED / FAO-56 evapotranspiration methodology.
Model SF1-S.005
Interpret soil test results for pH, organic matter, CEC, phosphorus, and potassium against NRCS critical thresholds. Generates lime and amendment action recommendations by crop.
Model SF1-S.006
Estimate crop yield potential and compare against USDA NASS county benchmarks. Models the combined effect of soil productivity rating, water regime, and field management on expected yield.
Model SF1-S.007
Calculate agricultural lime application rate to raise soil pH to target. Uses the NRCS SMP buffer pH method and adjusts for lime quality (Effective Neutralizing Material — ENM/ECC).
Model SF1-S.008
Quantify the agronomic and economic benefits of crop rotation. Models nitrogen credit from legumes, yield response, and disease pressure reduction from USDA ARS long-term rotation research.
Built on USDA NASS, ARS, and NRCS research data, AgrStak's Crop Production & Agronomy calculators translate federal agronomic science into instant farm-level decisions. From seeding rate optimization to soil fertility interpretation, these 8 models support agronomists, crop consultants, extension specialists, and precision farmers across the United States. Part of AgrStak's 431-model platform — patent pending.