Report of the Michigan Academy of Science, volume 15
Report of the Michigan Academy of Science, volume 15
Michigan Academy of Science. Council
The book Report of the Michigan Academy of Science, volume 15 was written by author Michigan Academy of Science. Council Here you can read free online of Report of the Michigan Academy of Science, volume 15 book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Report of the Michigan Academy of Science, volume 15 a good or bad book?
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From the preceding it is seen that pines are at present quite scarce on these hills, persisting on but a few of them, and then only on the sides toward the river. They have been left here on the more inac- cessible places by the lumbermen, and have persisted because the de- ciduous trees can not use the sterile and rather unstable soil where they are perched. The deciduous trees do not seem as well able to stand the caving of the soil as do the younger pines, nor do they es- tablish themselves ...as well on the denuded areas. The pines are not reproducing themselves to any extent; no cones were present on the trees, and only one fallen cone was found. These pines may fruit only at long intervals, most of them are too young to fruit. With a fair seed-production the pines might persist here for a long time, but seed-production has been nearly entirely stopped, probably because of the death of the older trees where the soil has caved from about their roots. University of Michigan, April, 1913.
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