The herd, the flock and the harvest — most of it running from the 1860s, which makes these the longest records anywhere on this site. The interesting part is rarely the total: it is that output kept climbing while animals and acres fell, because yield per cow, per bird and per acre did the work instead.
What the country grows and raises, back to 1866.
The longest records on this site. Corn, wheat, cotton, hay, barley and oats all run from 1866; cattle, hogs and sheep from the same decade. Beef and pork production start in 1899, milk in 1924.
The recurring story is output rising while the inputs fall:
Source is USDA NASS QuickStats (public domain). Coverage is uneven and that is the source, not a gap: poultry, goats and eggs only exist in QuickStats from 2008 — the older poultry numbers are in printed USDA yearbooks the API does not carry.
Inventories and production are different kinds of number. A head count on 1 January and a year’s total output are not comparable directly, so read them as separate lines rather than one story.