1. Excavate the top 4-6 ins layer of dirt and fill back up with new topsoil of good quality.5 f4 e p% i# ]
2. Reduce the use of chemical fertilizer and use organic one instead.
3# ceramistpalace 9 \4 p' G+ g a* m1 N/ d* L& w4 V/ l6 M/ |- V4 g7 p+ S( p% U' }$ y s
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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。 e* E G# B2 E3 ]) a- u" M2 tBIGWOOOL 发表于 2010-1-4 23:21
. Q% D( a1 g9 u' HI 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.