1. Excavate the top 4-6 ins layer of dirt and fill back up with new topsoil of good quality.' N5 v, _+ c/ R: T! C+ e
2. Reduce the use of chemical fertilizer and use organic one instead.
3# ceramistpalace Y# h5 l9 G2 @7 O" v# S" A 8 l. e9 V, R/ d , m @: i* b' d- G) O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。 " ^' q# @8 X& C9 @, sBIGWOOOL 发表于 2010-1-4 23:21
2 D4 ]8 P! j6 b4 h' 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.