. Canadian forestry journal. Forests and forestry -- Canada Periodicals. 230 Canadian Forcsfry Journal, May, icj20. Light Demanders: Black Ash: White Ash; jack I'inc; Red Pine; Cotton- wond ; tamarack; Hickories; Lo- cust. In the case of yoiin^ stands of mixed species it is desirable to have some knowledge of each species re- quirements in ,reg-ar(l to lii^dit and shade. Take for example a stand of young Avhite pine and hemlock com- ing -up together. The white pine l)e- ing the more valuable it is the tree we desire to encourage the most. It is well, therefore, to know that the hemlock will pr
. Canadian forestry journal. Forests and forestry -- Canada Periodicals. 230 Canadian Forcsfry Journal, May, icj20. Light Demanders: Black Ash: White Ash; jack I'inc; Red Pine; Cotton- wond ; tamarack; Hickories; Lo- cust. In the case of yoiin^ stands of mixed species it is desirable to have some knowledge of each species re- quirements in ,reg-ar(l to lii^dit and shade. Take for example a stand of young Avhite pine and hemlock com- ing -up together. The white pine l)e- ing the more valuable it is the tree we desire to encourage the most. It is well, therefore, to know that the hemlock will produce more shade than the white pine, and we must favor the white pine when thinning, tO' encourage it to keep ;diead of the hemlock. Should the hemlock become the_ dominant, or leading tree, the white pine will suffer bv beino; too severely shaded. In thinning, select the trees you desire to retain and then decide what trees should be cut to help the ones that are to remain. It is well to thin on the safe side and take out too lit- tle, rather than too much. One can always come back later and remove a few trees if necessary. It is a much more difficult matter to overcome the evil of too heavy a thinning. It is a good general rule not to cut a tree if its removal will leave an opening which cannot be closed by the branches of surrounding trees in from three to four years. Begin to thin when the trees are still young, as soon as the lower set of branches havq ; been killed, and repeat this thinning every five or six years. Light thinning every five or six years is bet- ter than severe thinnings made at longer periods. The average wood- lot owner, however, will probably find . it more convenient to begin thinning when the material is of sufficient siz^ to make firewood or be used for some —B. R. MORTON. "CANADA FIFTY ; YEARS rentide Coni])any's nurseries at Proulx, and some (^[ the old cutting operations in ilie Teche district. He has also visited
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