1. Excavate the top 4-6 ins layer of dirt and fill back up with new topsoil of good quality.) w1 i; o6 _5 s* d( h
2. Reduce the use of chemical fertilizer and use organic one instead.
3# ceramistpalace & I' {4 R! `2 q3 U ; q4 c/ f$ f+ z 8 _( }0 D' Z% {9 r" |* |. K/ 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。 & N" f I- U' g `BIGWOOOL 发表于 2010-1-4 23:21
) ~' ]3 F z* L% W! c* FI 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.