How to get dog urine smell out of dirt

by Elaine
The people that lived in our home before us had a bunch of dogs . I have a couple dogs of my own . I have been fixing up my back yard and as I dig I can smell years of dogs going potty back there . any suggestions as to how to get rid of this oder. It is really bad when the ground gets wet , pee yoo, please forgive the pun.

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