A farm can now hold as many production unit codes as it needs. Every block belongs to one, and reports take production unit into account. But the decision of whether to set up a new production unit or a new farm is important. The wrong choice can slow you down.
Why this matters
Plenty of operations carry three or four PUC codes but are one working farm: one chemical store, one crew, the same tractors and sprayers. The codes exist because export regulation requires them, not because the units are run separately.
That used to have to be several farms in the app, which split the stock across accounts that had no business being apart. It can now be one farm, with a code on each block.
The other way round still holds
If the a unit really is run on its own — its own store, its own crew, its own equipment — it should still be its own farm.
The reason is in how an application is recorded: the block you spray carries its production unit, but the store you draw from, the tractor, the sprayer and the operator all come from the farm. Nothing narrows those lists down by production unit. So two production units on one farm that do not share their equipment give you a choice of operators who work somewhere else and stores you cannot actually draw from — and sooner or later somebody picks the wrong one.
Which way to go
There is a one-question test, and it is not about paperwork:
Does the new land share the same chemical stores, the same tractors and sprayers, and the same operators as the land you already have?
Yes: add a production unit. No: set it up as a separate farm.
It is worth getting right the first time, because unpicking it later means moving stock and history between accounts. The full version — what to do when only some of it is shared, and what to do if it is already set up the wrong way — is in Farms and production units.