Investigations aimed to reveal peculiarities of laser-induced fluorescence (LIF) of the Siberian stone pine (Pinus sibirica Du Tour) and the warty birch (Betula pendula Roth.) have been carried out for different concentrations of easily hydrolyzable nitrogen in soil. Along with remote LIF-signal analysis of experimental transplants and reference plants at λ = 685 and 740 nm, needles and leaves pigmentation as well as nitrogen concentration in soil have been measured. An optimal nitrogen level as well as wood plants response to nitrogen surplus in soil have been ascertained.