Which preposition to use with fertilizing

with Occurrences 3%

Fulfill the eternal laws, foster them, and then the earth will be so much the more fecund the more it is fertilized with blood, and the thrones the more solid the more they rest upon crimes and corpses.

by Occurrences 1%

He first came to the Tankesso, a rapid stream flowing into the Niger just below its cascades, and noticed here a mountain of pale pink quartz in regular strata of eighteen inches in thickness, a few miles below which the river flows in a wide and tranquil stream through extensive plains, which it fertilizes by its inundations.

into Occurrences 1%

He spoke of none of the achievements which the world granted to be his; instead, the little byway humanities were called forth, for the other to hearbuds of thought and action, which other pressures had kept from fertilizing into seedthe very things he would have delighted in relating to a dear, wise woman.

to Occurrences 1%

But an immense field for expending the public money and increasing the power and patronage of this Government was left open in the concession of even a limited power of Congress to improve harbors and riversa field which millions will not fertilize to the satisfaction of those local and speculating interests by which these projects are in general gotten up.

towards Occurrences 1%

Is it possible that something the same happens with whole nations and peoplesan actual lust and passion of conflict, a mad intercourse and ravishment, a kind of generation in each other, and exchange of life-essences, leaving the two peoples thereafter never more the same, but each strangely fertilized towards the future?

after Occurrences 1%

Then it'll need a lot of fertilizing after that.

Which preposition to use with  fertilizing