USDA NASS QuickStats — authoritative US agricultural statistics: crop yields, acreage, production, livestock inventory, and prices received. Filter by commodity (e.g. CORN, SOYBEANS, CATTLE), year (or year__GE/year__LE range), state (2-letter), county, statistic category (YIELD, PRODUCTION, AREA HARVESTED, PRICE RECEIVED), and aggregation level (NATIONAL/STATE/COUNTY). Returns normalized rows with value + unit. QuickStats caps results at 50,000 rows, so narrow broad queries (a 400 RESULT_TOO_LARGE tells you to add filters). Public-domain federal data.