In a manner that is capable of being cultivated or in a way that demonstrates cultivability.
From 'cultivable' plus the -ly adverbial suffix. A technical term used mostly in agricultural writing to describe methods or approaches to developing land.
This word is so obscure that most word databases skip it, yet 18th-century agricultural manuals used it earnestly—showing how technical jargon disappears when the industry changes.
Complete word intelligence in one call. Free tier — 50 lookups/day.