1. Excavate the top 4-6 ins layer of dirt and fill back up with new topsoil of good quality.9 F" ]" E" Q0 k; j# K
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 1 g/ Q- b0 t R# m0 h
3# ceramistpalace 4 [+ g' t* }" n6 E# z
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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。; ~/ H0 e7 V6 u; A/ M. l
BIGWOOOL 发表于 2010-1-4 23:21
* ?; x% `* a* u0 E" x4 ~5 nI 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.