1. Excavate the top 4-6 ins layer of dirt and fill back up with new topsoil of good quality. # U' U# n9 e% Q/ F D2. Reduce the use of chemical fertilizer and use organic one instead.
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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。 + d' U5 t0 R D% ABIGWOOOL 发表于 2010-1-4 23:21
+ E) p# _6 N3 bI 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.