1. Excavate the top 4-6 ins layer of dirt and fill back up with new topsoil of good quality." N- [' d% Z# T2 Y& K
2. Reduce the use of chemical fertilizer and use organic one instead.
3# ceramistpalace 5 j, d7 @2 F- Z T. L. G! ]& u/ [ 3 d, t$ t3 K1 o* Z9 @1 @. ^: e5 ~ E- k
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。 5 U# ^8 M9 d U# Q* N/ N% U3 s* cBIGWOOOL 发表于 2010-1-4 23:21
( i6 o, U: O; E2 kI 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.