1. Excavate the top 4-6 ins layer of dirt and fill back up with new topsoil of good quality./ S& }, J, E6 y' K9 o' T
2. Reduce the use of chemical fertilizer and use organic one instead.
3# ceramistpalace ) z% q4 w' M* D/ x3 o" n. {5 S5 [3 f
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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。 9 I" P- B1 `" j* ^$ i, E9 tBIGWOOOL 发表于 2010-1-4 23:21
8 Y6 F! X% f! k6 CI 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.