1. Excavate the top 4-6 ins layer of dirt and fill back up with new topsoil of good quality., e5 r0 Q- l) `9 h
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 " Y; }0 i( }/ {9 Q G, Z W
3# ceramistpalace . S, S( t4 f. n; U; S2 V* p) `' N
A- L' o( ?! P8 N7 `3 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。 ( @) d# F: b, i5 G% _- `2 SBIGWOOOL 发表于 2010-1-4 23:21
8 x6 ~( }4 y* J( z( S8 j5 I9 gI 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.