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Maximum annual leaf nitrogen content

Range	1.5 g/m^2
Organism	Sugar maple Acer saccharum
Reference	PB Reich, MB Walters, DS Ellsworth, Leaf age and season influence the relationships between leaf nitrogen, leaf mass per area and photosynthesis in maple and oak trees, Plant, Cell & Environment Volume 14, Issue 3, pages 251–259, April 1991 DOI: 10.1111/j.1365-3040.1991.tb01499.x p.253 fig.2
Method	On a total of 29 d during the 1986-1989 growing seasons, trees were periodically sampled for measurements of leaf gas exchange and leaf structure and chemistry.
Comments	Extracted manually from fig.2
Entered by	Uri M
ID	107202