fanhoiyiu 發表於 2012-9-3 11:48
可唔可以真係用骨灰既呢?
骨灰.....indeed, when bone got burn into ash, most of the volatile component, like phosphorous, nitrate,.....gone, and only calcium ion left behind, i assume, bone ash got not much nutrient left when compare to bone powder, as they are only ground into tiny powder,and nutrient will release into soil from time to time |