How do you sterilize Oak trees? I have gotten up hundreds of acorns sour my lawn.

I have gotten up hundreds of acorns sour my lawn.
What type of flower is this?
Answers:    cut them down, I love trees but some wonderful resourcefully thought out person settled many years ago to plant 2 within an enclosed courtyard and in a minute most of our duties are cleaning up oak leaves and acorns.

Shake your head adjectives you want but when someone decided to put oak trees contained by an enclosed court patio in a institution 40 years ago they just weren't thinking...in that are leaves in every board room way, every class room where on earth they are dragged in, adjectives over the courtyard cement (it's mostly cement), in the flower bed, under the lockers...this to the principal is unexceptable and we spend most of our days chasing leaves and LOTS of them, very soon this time of year we have acorns too sheeee...we lone have one lone squirll...no kid with an electric sidewalk vacuum made and purchased for this drive we spend 2 1/2 - 3 hours first thing contained by the AM before college starts cleaning up loads of leaves, it's insane...
If you live in Florida and settle property tax you discharge me for 3 hours to clean up leaves everyday, 15 hours a week... presently shake your head at that. Job protection at it's finest...LOL
Manure cross-question?
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