1. Excavate the top 4-6 ins layer of dirt and fill back up with new topsoil of good quality.) o; z% L1 m" i+ _. F3 n
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 : h7 _5 N. F" `. H. E; m% W
3# ceramistpalace + P4 c7 s$ \2 `5 J4 L" W 2 }# L2 j6 s+ O, i5 o: T! {8 [( b& L. c( a6 {# i. \( k4 J a
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。 3 }) v( d% @0 B9 z8 m+ u" o6 KBIGWOOOL 发表于 2010-1-4 23:21
' b4 A, q8 Z1 g3 n5 H% X; Y
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.