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Analysis reveals quality differences in christmas trees based on soil type and geographic origin.
The type of Christmas tree the buying public desires is different from what most foresters consider a satisfactory tree. Poor soil may effectively control terminal growth but the quality of tree produced is inferior to that grown on fertile soil and sheared. Trees of a given species raised from seed of different geographic origin may vary greatly in quality and harvest value per acre. Angle of branching is the most important natural characteristic affecting density and shape and should be given first consideration in selecting seed trees.
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Robert G. Kintigh (1965) studied this question.
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