1. Excavate the top 4-6 ins layer of dirt and fill back up with new topsoil of good quality.1 w7 }/ I3 t3 N/ y
2. Reduce the use of chemical fertilizer and use organic one instead.
3# ceramistpalace , O& \9 h! _+ ^6 O- M3 m. V9 M4 \/ s' r1 M" ^& N
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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。 }# m5 M7 j' L. y6 M, z( i& o" yBIGWOOOL 发表于 2010-1-4 23:21
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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.