1. Excavate the top 4-6 ins layer of dirt and fill back up with new topsoil of good quality.7 k6 n4 l! ]5 P i1 O" H# X
2. Reduce the use of chemical fertilizer and use organic one instead.
3# ceramistpalace * ^/ |$ v* f# P: K. r; y0 D 8 i8 y( S- g( T2 } 1 E5 P9 T3 ]' R( @- c! g: V* @9 V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。- ~: i0 G1 h v' I! u0 N B
BIGWOOOL 发表于 2010-1-4 23:21
- S# h% s2 ^# s4 R3 I5 d- g
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.