1. Excavate the top 4-6 ins layer of dirt and fill back up with new topsoil of good quality.2 K o5 N+ r+ N- V
2. Reduce the use of chemical fertilizer and use organic one instead.
+ k7 b) S y9 N8 e( X: ~- N4 K* P
I should tell a bobcat is required if you wanna do the whole front/back yard OR just spot-excavation (dig a bigger and deeper than normal hole, dump the old dirt and back fill w/ good topsoil when you want to plant a new tree) if you gonna do the job yourself.