| quantifying nitrogen-fixation in feather moss carpets of boreal forests. | biological nitrogen (n) fixation is the primary source of n within natural ecosystems, yet the origin of boreal forest n has remained elusive. the boreal forests of eurasia and north america lack any significant, widespread symbiotic n-fixing plants. with the exception of scattered stands of alder in early primary successional forests, n-fixation in boreal forests is considered to be extremely limited. nitrogen-fixation in northern european boreal forests has been estimated at only 0.5 kg n ha(- ... | 2002 | 12410308 |