1. Excavate the top 4-6 ins layer of dirt and fill back up with new topsoil of good quality. 1 U. ]! n$ B% j/ w6 ]8 S- y B+ \2. Reduce the use of chemical fertilizer and use organic one instead.
3# ceramistpalace 4 c& I+ q8 d( c# S* @: j' A m% }! W& z; M4 a4 _3 S4 e a3 t- r6 H, r M" s/ }; K+ E, ]
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。 / A4 H! f k1 Z, r [! y5 z% EBIGWOOOL 发表于 2010-1-4 23:21
% m- n6 Z- p' i; Q8 OI 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.