1. Excavate the top 4-6 ins layer of dirt and fill back up with new topsoil of good quality.% u3 g% ^& n/ p/ G9 t
2. Reduce the use of chemical fertilizer and use organic one instead.
/ j; ~- j. ?; y) G5 Y8 h. O6 t$ M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。 ( c) g4 h2 e! a3 u+ ABIGWOOOL 发表于 2010-1-4 23:21
7 Y8 f% R+ j) w$ Q0 y5 m6 Y1 aI 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.