1. Excavate the top 4-6 ins layer of dirt and fill back up with new topsoil of good quality.7 }* }! O5 c5 L d# p" ~+ T, f A
2. Reduce the use of chemical fertilizer and use organic one instead.
3# ceramistpalace 3 d4 n0 A: x( Q' l5 A- x8 Q( i) ]4 j1 z
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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。 1 V8 Z9 v+ u# n' f; O0 I+ n" OBIGWOOOL 发表于 2010-1-4 23:21
) Y6 R5 V: M; H# D |$ }/ }4 V! uI 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.