1. Excavate the top 4-6 ins layer of dirt and fill back up with new topsoil of good quality. 8 w' x* [. `3 r# S; @, n, |2. Reduce the use of chemical fertilizer and use organic one instead.
3# ceramistpalace & m1 Q# l& _+ ~# i. p 9 k" K; c+ z. R K% b' F& D9 \; m$ R+ m' d/ E0 v
可是我已经铺上了大概3IN 的COMPOST 土,要挖起来就费劲了。不过还要谢谢您的回复。5 s" J$ p6 l1 Z# T
BIGWOOOL 发表于 2010-1-4 23:21
) n# c8 F* w, m( kI 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.