1. Excavate the top 4-6 ins layer of dirt and fill back up with new topsoil of good quality. x, Q1 K8 ]+ f7 t q
2. Reduce the use of chemical fertilizer and use organic one instead.
: C. K' I0 }# Z6 Z6 cI 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.