1. Excavate the top 4-6 ins layer of dirt and fill back up with new topsoil of good quality. 4 m: A: m7 ^0 M% p+ q1 B& D9 T2. 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 ; V3 r0 s% m, [9 l" y, W& ^
3# ceramistpalace ! ~0 a0 `+ @' a h. z8 j 6 k; P1 t' Y" h6 k" ^& F. h4 {5 b5 S2 G
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。, {' W0 W) \5 M/ k
BIGWOOOL 发表于 2010-1-4 23:21
# w& f' _- y. }; r7 LI 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.