Factorio Forums

What?

The nutrients from fish recipe should accept productivity modules, and the artificial/overgrowth soil recipes should not.

Why?

The productivity module restrictions on these recipes don’t make sense.
I did the math, and productivity modules in the fish nutrient recipe would not create a net positive nutrient loop with fish breeding. So, there is no reason for that restriction to be there.
The artificial soils are in no way intermediate products, they’re primarily buildable tiles. Recipes for landfill, concretes, icefill and foundation don’t accept productivity modules, so neither should these.
Both of these cases look like simple oversights to me, this is more of a report than a suggestion.