interesting thread. ive seen threads in the past with people using batteries, coiled copper wire & a nail(iirc) to make mag fields in grows, but was never convinced. as for throwing some magnets in your substrate/pots is a new one on me, but interesting none the less. G'luck
plenty of stuff on the web on the issue: http://www.google.co.uk/#hl=en&sugexp=les%3B&gs_nf=3&cp=51&gs_id=48&xhr=t&q=using+magnetic+fields+growing+plants+google+scholar&pf=p&tbo=d&rlz=1R2GGIT_en-GB&biw=1280&bih=577&sclient=psy-ab&oq=using+magnetic+fields+growing+plants+google+scholar&gs_l=&pbx=1&bav=on.2,or.r_gc.r_pw.r_qf.&fp=d5e665ec2b788175&bpcl=38625945
plenty of stuff on the web on the issue: http://www.google.co.uk/#hl=en&sugexp=les%3B&gs_nf=3&cp=51&gs_id=48&xhr=t&q=using+magnetic+fields+growing+plants+google+scholar&pf=p&tbo=d&rlz=1R2GGIT_en-GB&biw=1280&bih=577&sclient=psy-ab&oq=using+magnetic+fields+growing+plants+google+scholar&gs_l=&pbx=1&bav=on.2,or.r_gc.r_pw.r_qf.&fp=d5e665ec2b788175&bpcl=38625945