1. Excavate the top 4-6 ins layer of dirt and fill back up with new topsoil of good quality.9 m- b3 }* b$ z2 Y. R, L4 V, q
2. Reduce the use of chemical fertilizer and use organic one instead.
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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。' G" _! C4 v% u# m
BIGWOOOL 发表于 2010-1-4 23:21
! p8 a; O( ?1 F' s! VI 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.