. A primer of forestry : part I, the forest. Forests and forestry. THE FOEEST, 27 little tree stands free from those about it. As yet, too, the life of the young" forest may be threatened or even destroyed by any one of the enemies already mentioned, or it may suffer just as severely if the cover of the older trees above it is too dense. In the beginning of their lives seedlings often require to be protected by the shade of their elders, but if this protection is too long- continued they suffer for want of light, and are either killed outright or live only to drag on stunted and unhealthy
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. A primer of forestry : part I, the forest. Forests and forestry. THE FOEEST, 27 little tree stands free from those about it. As yet, too, the life of the young" forest may be threatened or even destroyed by any one of the enemies already mentioned, or it may suffer just as severely if the cover of the older trees above it is too dense. In the beginning of their lives seedlings often require to be protected by the shade of their elders, but if this protection is too long- continued they suffer for want of light, and are either killed outright or live only to drag on stunted and unhealthy lives. THE FOREST COVER ESTABLISHED. The crop which we are following has had a suitable proportion of shade and light during its earliest years, and the seedlings have spread until their crowns begin to meet. Hitherto each little tree has had all the space in the air and soil that it needed for the expansion of its top. Fig. 20.—Young White Pine seedlings whose lower branches have just begun to interfere. and roots. This would have been entirely good, except that meanwhile the soil about the trees has been more or less exposed to the sun and wind, and so has become dryer and less fertile than if it had been under cover, and consequently the growth has been slow. But now that the crowns are meeting, the situation becomes wonderfully changed. The soil begins to improve rapidly, because it is protected by the cover of the meeting crowns (fig. 20) and enriched by the leaves and twigs which fall from them. THE BEGINNING OF THE STRTTGGIiE. In so far the conditions of life are better, and in consequence the growth, and more especially the height growth, begins to show a marked increase. On the other- hand, all the new strength is in 173. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Pinchot, Gifford, 1865-1946