fertileness

noun

1. (rare, uncountable)The state or characteristic of being fertile.

   “... and he, according to the fertileness of the Italian wit, did not only afford us the demonstration of his practice, but sought to enrich our minds.”

   “This valley is eighty-seven miles long. It did not have the fertileness of Brown's Park.”

   “The fertileness of Place du Bois, "rich in its exhaustless powers of reproduction," reflects a golden age of easy life.”