1. Excavate the top 4-6 ins layer of dirt and fill back up with new topsoil of good quality.' X5 y' |: W0 h, C9 K
2. Reduce the use of chemical fertilizer and use organic one instead.
3# ceramistpalace + v8 r" q, I6 z. w+ z+ U. q1 P Y- O8 p1 i
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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。$ d! y% P U* x9 R! h% i
BIGWOOOL 发表于 2010-1-4 23:21
[, S% D1 I! eI 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.