The tree

Tree leaves have been collected from three series of forest plots, each series with a wide range of tree species established on a fairly uniform soil type. The contents of sodium, potassium, calcium, magnesium, iron, manganese, silica, phosphorus, ash, carbon, and nitrogen in the tree leaves are given.

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The chemical compositions of the leaves are related to soil conditions and the tree species selected for afforestation. When hardwood leaves are compared with softwood leaves some consistent differences in chemical composition occur between the two groups at all three localities. The ecological and silvicultural applications of foliar analysis are considered.