1. Excavate the top 4-6 ins layer of dirt and fill back up with new topsoil of good quality. ! N) \ C; C- a0 l6 j7 q2 ?" j2. Reduce the use of chemical fertilizer and use organic one instead.
本帖最后由 ceramistpalace 于 2010-1-5 16:28 编辑 1 }+ T9 d g# r/ I
3# ceramistpalace 3 b& v# o3 n0 B
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: t Z6 M) s' a4 i) T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 R; e* b+ @/ x* _" S, ~7 j* ]
BIGWOOOL 发表于 2010-1-4 23:21
' i, ~& b! I R& J" JI 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.