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🐄 USDA ARS · Animal Genomics & Improvement Laboratory, Beltsville MD — PRECISION DAIRY FARMING · SF21

🐄 Precision Dairy Farming

Milk yield prediction — somatic cell count risk — feed conversion efficiency — reproductive performance — herd profitability. Grounded in USDA ARS AGIL dairy science and DHIA benchmarks.

🥛 USDA Live Data — Dairy Markets & Financials LIVE DATA
Select source → auto-populate calculators
Fetch one source or load all at once
NASS Milk: not loaded | AMS Dairy: not loaded | ARMS: not loaded
🥛 NASS Milk Prices
📊 AMS Dairy Markets
💰 ERS ARMS Financials
🥛 USDA NASS — Milk Price Received ($/cwt)

Live NASS milk price by state & year. Auto-fills all milk price fields across SF21 calculators.

Select state and year, then click Load Milk Prices.

Source: USDA NASS QuickStats API

📊 USDA AMS — Dairy Commodity Prices

Weekly AMS dairy commodity prices: cheese, butter, nonfat dry milk, dry whey. Contextualizes farm-gate pricing.

Select product then click Fetch AMS Prices.

Source: USDA AMS Dairy Market News

💰 ERS ARMS — Dairy Farm Financial Benchmarks

USDA ERS ARMS income statement data for dairy operations — gross income, net farm income, operating costs, cost/cwt benchmark.

Select state and year then click Fetch ARMS Data.

Source: USDA ERS ARMS

🥛 Wood Lactation Curve Model

Model SF21-S.001

Predicts daily milk yield at any stage of lactation using the Wood (1967) incomplete gamma function — peak yield, days to peak, and estimated 305-day total. Grounded in USDA ARS Animal Genomics & Improvement Laboratory dairy genetics research.

Current day of lactation (1–400)
First-day yield of lactation
Typical Holstein: 0.15–0.30
Typical Holstein: 0.002–0.005

🦠 Somatic Cell Count Risk Assessment

Model SF21-S.002

Estimates mastitis infection probability, daily yield loss, annual revenue impact, and quality penalty based on somatic cell count. Aligned with USDA DHIA SCC thresholds and Grade A Milk Standards (7 CFR Part 58).

Normal: <200   Elevated: 200–400   High: >400
Auto-filled from NASS if loaded

🌾 Feed Conversion Efficiency

Model SF21-S.003

Calculates feed conversion efficiency (FCE), income over feed cost (IOFC), and DMI as % of body weight. Based on NRC (2001) Nutrient Requirements of Dairy Cattle, 7th Edition, and USDA ARS precision nutrition models.

Typical Holstein peak: 45–60 lbs/day
Typical TMR: $0.10–0.18/lb DM

🧬 Reproductive Performance Index

Model SF21-S.004

Calculates pregnancy rate, calving interval, and excess days-open cost. Uses USDA DHIA reproductive performance standards and economic values from USDA ARS dairy herd efficiency research.

Industry target: 85–100 days
US national avg: ~30–35%
Target: 20–25% for high-performing herds

📊 Herd Profitability Dashboard

Model SF21-S.005

Full income-over-all-costs (IOAC) model integrating milk revenue, feed, labor, health, and replacement costs. Benchmarked against USDA ERS ARMS 2023 dairy farm financial data for profitability assessment.

Typical TMR: $6–$12/cow/day
Labor, health, breeding, supplies

🐄 About SF21 — Precision Dairy Farming

SF21 delivers 5 research-grade dairy science models grounded in USDA ARS Animal Genomics & Improvement Laboratory (Beltsville, MD) research and National Dairy DHIA performance benchmarks. Models cover the complete precision dairy workflow: Wood (1967) lactation curve prediction, somatic cell count risk assessment aligned with 7 CFR Part 58, NRC (2001) feed conversion efficiency and IOFC analysis, DHIA reproductive performance indices, and integrated income-over-all-costs herd profitability modeling. Live USDA data integration via NASS QuickStats, AMS Dairy Market News, and ERS ARMS auto-populates current milk prices and financial benchmarks across all calculators.

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