M. Ferretti et al., MINERAL NUTRIENTS AND TRACE-METALS IN TREE-RINGS OF PINUS SP, Fresenius' journal of analytical chemistry, 347(10-11), 1993, pp. 467-470
Ca, Mg, K, Na, Fe, Mn, Cu, Al, Zn, Pb, Cd, Rb have been determined in
the rings of two Pinus sp. trees growing in different sites in Italy.
Noticeable behavioral differences exist between nutrients and trace me
tals.