1. Excavate the top 4-6 ins layer of dirt and fill back up with new topsoil of good quality.6 n+ g1 I/ |1 y" ~; u
2. Reduce the use of chemical fertilizer and use organic one instead.
3# ceramistpalace : z0 X' A ]& A; L1 J/ e, n ' c) \0 o; \& h/ S$ t2 Q' C, a
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。8 P+ |5 C# B0 C6 R
BIGWOOOL 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.