Professor Graves—Mr President, Ladies and Gentlemen: The movement for the conservation of our natural resources has reached the second and most critical stage in its progress. The country has expressed in unmistakable terms its approval of the principles of Conservation; there is now before it the problem of the practical application of those principles.
In forestry there is a very general agreement that our woodlands must be protected from fire, that waste must be reduced, and that a future timber supply must in some way be provided. In carrying out these purposes, differences of opinion arise, and it soon develops that with many persons the interest in forestry is confined to the abstract idea and does not extend to its practice. When the requirements of forestry are considered, forest owners usually find that they must make some modification in their methods of cutting, that they must use more care in protection from fire and in saving young growth, and that if they are to secure a new growth of trees after cutting, some investment is necessary. The general public learns that in order to secure for the Nation the permanent benefits of the forest, National and State expenditures are required.
It is at this point that indifference and even opposition to Conservation arise. Indifference is shown by the public when it fails to make adequate appropriations for public forestry. Direct opposition appears from those who fear that their interests in one way or another may be adversely affected. There is a great deal of misunderstanding in regard to the methods of Conservation, and many have charged that those methods heretofore advocated are impractical. In order to be successfully applied, Conservation must be practical; but at the same time the methods must be such as will actually accomplish its real purposes. To my mind the real significance and value of this Congress is that an opportunity is afforded to make clear the methods of Conservation, and the country will then decide whether it will really be put into practice or become a mere name.
It is not my intention now to dwell at length on the fundamental importance to the country of forest Conservation. To those who know the needs of the people for forest products, the available resources, and the manner in which they are now being used up or destroyed, it must be clear that we are facing a problem which must be met by prompt and vigorous action.
A survey of the forest resources of the world shows clearly that in the long run this Nation must be dependent chiefly on its own supplies. Those who believe that we may destroy our own forests and then draw upon foreign resources of timber are misinformed as to the facts, for those supplies will not be long available. Foreign countries will need for their own use what they can produce, and many of the exporting countries are exhausting their forests just as rapidly as America. The timber supply in this country is being rapidly depleted. We are extravagant in our use of forest products; there is waste in logging and manufacturing, and the loss by fire is a shame to the country. To offset this reduction of merchantable resources the annual production of timber by growth amounts to much less than one-third the average quantity used and destroyed. In other words, we are actually exhausting our forest supplies by use and waste.
There is a sufficient amount of land in the country better suited to forest growth than other purposes to produce all the wood and timber needed by the Nation, provided the forest is properly handled. This land includes mountain areas where the protection of the vegetation is necessary to conserve water and protect the slopes. The protective benefits of the forest can thus in most cases be secured at the same time as the production of wood and timber. There are, however, certain mountain regions of the West where large trees will not grow, and where the cover of brush and grass must be conserved to protect the slopes and to regulate the run-off of water. In these mountains special reservations must be maintained primarily for protective purposes.
There is but little disagreement in regard to these simple propositions. The difficulty lies in the fact that the people do not appreciate the need of immediate action to put the principles of forestry into practice. The reason why prompt action is not appreciated is that, except locally, the effects of forest destruction have not yet been keenly felt. It is true that the prices of certain grades of lumber have tended to increase. This increase is in part due to the reduction of supplies, but it is due also to the same causes of increased cost of production as have raised the price of other manufactured commodities (applause). The development of railroad transportation and of methods of logging have constantly opened new forest resources and furnished a supply to the public. There are today over 30,000 saw-mills throughout the country cutting timber and competing for the market. Although the prices of lumber may seem high to the consumer it is still true that in some sections the competition among the manufacturers is keeping the prices down to a point where it is hard to market low grades and to utilize in full any but the best trees in the forest. As long as the value of timber is below what it would cost to produce it by growth, the general public will not realize that our supplies are being depleted. It is after the virgin supplies are exhausted—and that will come in a comparatively short time—that the great increase in values will come and the public will suffer. We are urging action now in order that there may be new supplies produced to meet the needs of the Nation at that time. (Applause)
The general public fails also to appreciate the effect of forest destruction on stream-flow and on soil erosion. Some even go so far as to deny the connection between forests and stream-flow. There are many factors which determine the stability of water flow. Climate, character of soil, topography, and vegetative cover, all have an influence on the run-off of water. There may be a change of conditions of one or more of these influencing factors sufficient to upset the equilibrium established by nature, and alter the manner of run-off of the water in a given watershed (applause). In humid regions, where the old timber is cut off or burned, a cover of young trees or brush often springs up quickly and protects the slopes before the character of the stream channels is changed. A single clearing of the forest may thus have only a small or temporary effect on water flow. The repeated destruction of the cover may, however, result in a permanent change, and finally produce torrent conditions. Thus in the Southern Appalachian province it is not so much the present and past conditions—although those are serious—which demand forest conservation, as what will inevitably be the result of continued destruction of the cover. (Applause)
Where the conditions for forest growth are critical, and the soil and topography are such that the balance of nature is easily disturbed, the effects of forest destruction are much more quickly felt. In certain parts of the West we find already examples of flood and torrent conditions equal to those in France and Asia. For example, in Utah there are watersheds where, on account of the burning of the forests and the over-grazing of slopes, torrent conditions are already definitely established. One of the most extreme and striking instances in the West is found on the watershed of Kanab creek flowing through southern Utah and northern Arizona. As the result of over-grazing, the tributary streams have already become deep washes, and many new and deep gulches have been formed running into the main channel and into the side channels. The water which falls on the surface is quickly carried to some stream or wash which becomes a miniature torrent. The gathering of these together in the main channel makes a flood which is irresistible. The loss from the destruction of dams and bridges, the washing away of arable lands, and the deposit of rocks and gravel on cultivated fields, has been enormous. The restoration of vegetation alone will not cure the evil. It is now an engineering problem to check the torrential flow of water in the various streams and washes.