1. Excavate the top 4-6 ins layer of dirt and fill back up with new topsoil of good quality. ) |/ h% L3 @8 X* R2. Reduce the use of chemical fertilizer and use organic one instead.
3# ceramistpalace 9 c4 {: ~: `# C* G9 d2 I ( M) T4 c) }& X0 D m/ v# A+ q 6 H2 O6 J* q" D1 P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。; o+ W9 n5 ?' B5 i- I0 ]/ L3 Z
BIGWOOOL 发表于 2010-1-4 23:21
9 R: W6 _/ y5 J+ r1 rI 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.