1. Excavate the top 4-6 ins layer of dirt and fill back up with new topsoil of good quality.& }6 ?# W7 h7 A- w- P9 g$ l
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 3 s/ z6 Y1 V+ g: s! a# b' O5 J- z
3# ceramistpalace 6 n2 ?0 z3 w) w7 m) v0 s& e! B* M- f& Y% { H' X1 h, W: Q# B( \) M
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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。) S \4 H" w$ r/ b# P9 O h
BIGWOOOL 发表于 2010-1-4 23:21
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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.