1. Excavate the top 4-6 ins layer of dirt and fill back up with new topsoil of good quality. 5 w1 K, C/ ^# e$ q5 ~1 ~' w2. Reduce the use of chemical fertilizer and use organic one instead.
3# ceramistpalace ; ]( t. ^# f# i, F 5 Z& _& S1 U* K6 M1 C2 P7 a6 _6 H/ p$ `9 s/ t" K" D2 N# o7 s
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。 # n5 h. c* ^" b# a- dBIGWOOOL 发表于 2010-1-4 23:21
- Q! \7 Y Q. b. uI 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.