Economic weed threshold modeling, herbicide resistance risk assessment, cover crop suppression science, and integrated weed management scoring — grounded in USDA ARS weed science research.
Official USDA price received and yield data by commodity, state, and year. Price auto-populates Storage Loss market price (SF18-S.003). Yield provides per-acre quantity reference for drying and storage calculators.
Source: USDA NASS QuickStats. Reference data used as fallback. Not endorsed by NASS.
Monthly USDA WASDE forecast — U.S. production, use, ending stocks, and projected season-average price. Use alongside NASS actuals to stress-test storage loss and drying calculations against forecast price scenarios.
Source: USDA FAS PSD Online (WASDE-aligned monthly forecast). Reference data used as fallback.
Side-by-side view of NASS historical actuals versus USDA WASDE forecast. Fetch both sources first, then select a commodity to compare. Use the price difference to run scenario analysis in the economics calculators.
Tip: Use the WASDE forecast price in economics calculators to model best-case / worst-case ROI scenarios alongside the NASS actual.
Determine the economic threshold for herbicide application based on weed density, competitive ability, crop value, and control cost. Based on USDA-ARS weed interference and threshold research.
Assess herbicide resistance development risk based on mode of action history, application frequency, and weed biology. Generates IWM rotation recommendations per USDA-ARS resistance management guidelines.
Estimate weed biomass suppression, light interception, and herbicide reduction potential from cover crop residue. Based on USDA-ARS cover crop and integrated weed management research.
Generate an IWM diversity score for your weed management program. Evaluates mechanical, cultural, biological, and chemical control diversity to assess long-term sustainability and resistance prevention.
Built on USDA-ARS Weed Science Research Unit science — AgrStak SF18 science calculators translate federal weed management research into farm-level decisions. From economic weed thresholds and herbicide resistance risk scoring to cover crop suppression modeling and IWM diversity assessment, these 4 models support agronomists and farmers managing weed pressure across diverse cropping systems.
Models integrate USDA-ARS weed interference research, resistance management guidelines, and integrated weed management (IWM) frameworks. Part of AgrStak's 431-model platform — patent pending.