1. Excavate the top 4-6 ins layer of dirt and fill back up with new topsoil of good quality.& k1 D+ G0 M4 C
2. Reduce the use of chemical fertilizer and use organic one instead.
本帖最后由 ceramistpalace 于 2010-1-5 16:28 编辑 & o) {! Z% H: N7 U% O' K
3# ceramistpalace ) P/ y3 E6 u. Q9 S' C. S3 b% k * y2 h- d) t/ u% e2 } % P7 ^: F. b3 i* R4 c g6 z# ]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。* k$ y2 H) B; w0 p+ c* R, e4 G H
BIGWOOOL 发表于 2010-1-4 23:21
$ b$ K9 ], Z0 w+ BI 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.