1. Excavate the top 4-6 ins layer of dirt and fill back up with new topsoil of good quality.0 U' ]6 ?+ X8 D J5 W
2. Reduce the use of chemical fertilizer and use organic one instead.
3# ceramistpalace @( B$ i3 E2 Z' Q! z3 h' h% V. G- Y
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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 R2 A/ P1 M2 z1 w6 [& {6 H
BIGWOOOL 发表于 2010-1-4 23:21
: t4 n2 i) F; ?/ T/ P% M6 PI 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.