In <6g2l56$sdu at sjx-ixn11.ix.netcom.com>, zyniecki at ix.netcom.com(EDWARD ZYNIECKI) writes:
>The term DIF is used in plant propagation for thermal period. Does
>anyone know what the term stands for and where it came from? Thanks
>for any information you can provide.
Dr Royal Heins of Michigan State is the one who did initial research on
DIF. It works well. Do a search for royal heins and dif.