1. Excavate the top 4-6 ins layer of dirt and fill back up with new topsoil of good quality. R* U/ j$ `2 u3 e: Y0 s* f- t/ u0 w
2. Reduce the use of chemical fertilizer and use organic one instead.
3# ceramistpalace + W8 J/ D; U0 R/ V
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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。$ F& n* V; V. R) U
BIGWOOOL 发表于 2010-1-4 23:21
+ L/ |) ]( i8 ~ H/ A) v% {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.