1. Excavate the top 4-6 ins layer of dirt and fill back up with new topsoil of good quality. n/ l, d& x" l& s8 s( C
2. Reduce the use of chemical fertilizer and use organic one instead.
3# ceramistpalace & c) Z2 n8 j, B& i- ?) s( t! b' m! S, f2 U5 G
7 k- o7 y$ [, P6 m N
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。 $ ]- x8 g/ J$ d6 H# k' W9 R6 ^1 \- HBIGWOOOL 发表于 2010-1-4 23:21
% s( p( f8 s8 tI 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.