1. Excavate the top 4-6 ins layer of dirt and fill back up with new topsoil of good quality.; N9 H$ I( K8 V- r# m2 P9 l
2. Reduce the use of chemical fertilizer and use organic one instead.
3# ceramistpalace 0 H# a' @( n! p# [) @$ ~. c
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5 G; j& I }: ]: _% R v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。 * L; u4 Z z5 T5 nBIGWOOOL 发表于 2010-1-4 23:21
* L5 J. x& @, @# h$ P3 E- s! h) GI 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.