1. Excavate the top 4-6 ins layer of dirt and fill back up with new topsoil of good quality.# ~. }, H# f/ n9 O+ s1 {
2. Reduce the use of chemical fertilizer and use organic one instead.
3# ceramistpalace ( J; u/ ]- T1 E5 g: ^& t0 M1 z3 X
7 G: F& K @8 c
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+ W- l# `' U IBIGWOOOL 发表于 2010-1-4 23:21
1 X' ^" k, T# z1 }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.