adj. Able, or suitable, to be manured or cultivated on.
the GNU version of the Collaborative International Dictionary of English
adj. Capable of cultivation.
adj. Capable of receiving a fertilizing substance.
The Century Dictionary and Cyclopedia
1. That may be cultivated; cultivable.
That may be manured, or enriched by manure; capable of fertilization.
Word Usage
"Corporation was not, to use a legal phrase, "manurable"; it could not be seized; nor had anyone (he believed) ever imagined such a thing as a dissolution of a corporation by a judgment in law until that day."