1. Excavate the top 4-6 ins layer of dirt and fill back up with new topsoil of good quality.5 u) a9 N4 l8 z7 s) @" |3 }4 s
2. Reduce the use of chemical fertilizer and use organic one instead.
3# ceramistpalace $ b% Q, g, ]! y* ` " e E4 z# n, B( g & _5 l: K& A. h/ W' h- ?6 O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。 ( v- g9 O$ V5 E C# k! }BIGWOOOL 发表于 2010-1-4 23:21
1 i' l. A) D9 }, d+ k0 @I 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.