A narrow-linewidth master-oscillator fiber power amplifier system was presented,in which an ultrastable, continuous-wave,single-frequency laser was adopted as t
Macronutrients (N, P, K, Ca, Mg, and S) in litter of three primarily spruce (Picea purpurea Masters) (SF), fir (Abies faxoniana Rehder & E. H. Wilson) (FF), and