Where is the INI of farm (for example: data\ini\fxlist.ini)? In the __edain_data?
Because I don't know which farm you want to edit, I'll give you the paths for all economy structures:
Gondor Farm: data\ini\object\goodfaction\structures\men\farm.ini
Rohan Farm: data\ini\object\goodfaction\structures\rohan\farm.ini
Imladris Farm:
data\ini\object\goodfaction\structures\imladris\imladrisfarm.ini
Mallorn Tree: data\ini\object\goodfaction\structures\elven\elvenmallorntree.ini
Dwarven Mineshaft:
data\ini\object\goodfaction\structures\dwarven\dwarvenmineshaft.ini
Mordor Slaughterhouse:
data\ini\object\evilfaction\structures\mordor\mordorslaughterhouse.ini
Isengard Furnace:
data\ini\object\evilfaction\structures\isengard\isengardfurnace.ini
Angmar Mill:
data\ini\object\evilfaction\structures\angmar\angmarmill.ini
Wild Mineshaft:
data\ini\object\evilfaction\structures\wild\wildmineshaft.ini