The timber of the pecan is less valuable than is that of most other hickories, and is in commercial use only as second-class material. However, it is the most important species of nut-bearing tree in the United States. Its native and introduced range includes the fertile lands of the plains of practically the entire southeastern quarter of the country. It is neither an upland nor a wet land tree. In the United States it is not found in the mountainous sections, nor, to any important extent, south of Middle Florida. In Mexico, it is occasionally found on mountain sides at considerable elevations and by some is supposed to be there indigenous. However, according to "Pomological Possibilities of Texas," written by Gilbert Onderdonk, of Nursery, Texas, and published by the State Department of Agriculture in 1911, its success at those altitudes is vitally dependent upon the water supply. In each case investigated by Mr. Onderdonk, while upon official trips made for the United States Department of Agriculture, he found the pecan trees to be adjacent to some stream, either natural or artificial. "At Bustamente," says Mr. Onderdonk, "one hundred and seven miles beyond Laredo, are pecan trees two hundred years old that have been watered all their lives and have continued productive. From these trees, grown from Texas pecans, pecan culture has been extended until there are now thousands of thrifty pecan trees under irrigation. One owner of a small lot sold his water right when his trees were about seventy-five years old, and when the writer visited his grounds fourteen years later, every one of his trees was either dead or dying."
We may yet find the pecan to be suitable for plateau or mountain land growth, but as Mr. Onderdonk reports was the case in Mexico, it is also the case here. The species must have ample water. With the proper amount of moisture, neither too much nor yet too little, there is no way of predicting to what altitudes or even latitudes it may be taken. Its northernmost points of native range are near Davenport, Iowa, and Terre Haute, Indiana. Iowa seed planted in 1887, at South Haven, Michigan, on the eastern shore of Lake Michigan, at a latitude of about 42½ degrees, have never been seriously affected by winter temperatures. However, they have fruited but little. So far as the writer can ascertain the crops of nuts have been insignificant both as regards quantity and character. Dr. Deming reports a large tree at Hartford, Conn., at a latitude of nearly 42 degrees which, judging from a photograph which he took several years ago, was then 3 feet in diameter and quite at home, so far as growth was concerned.
Other planted trees are fairly numerous along the Atlantic Coast between Washington and New York. There is one in the southern part of Lancaster County, Pa., near Colemanville, but so far as is known to the U. S. Department of Agriculture, important crops of nuts have never been realized from any of these northern trees. Crops from the native trees in the bottoms north of latitude 39 degrees or approximately that of Washington, D. C., and Vincennes, Indiana, are fairly uncertain. Northern nurserymen are now disseminating promising varieties of pecans from what has come to be known as the "Indiana district," which includes the southwestern part of that state, northwestern Kentucky and southwestern Illinois. In many respects these varieties compare very favorably with the so-called "papershells" of the southern states. They are believed to be of very great promise for northern planting in sections to which they may be adapted. However, before any northern varieties are planted for commercial (orchard) purposes, they should be fully tested as to their adaptability in the particular section where the planting is to take place. The commercial propagation of northern varieties of pecans began less than ten years ago; the first attempts were not generally successful, and as a result there are no budded or grafted trees of northern varieties yet of bearing age.
Aside from the pecan there are no named Pomological varieties of any native nut now being propagated, with very few exceptions. So far as these exceptions are concerned, it is probable that fewer than one hundred budded or grafted trees of such varieties are yet of bearing age, and of such as have attained the age at which fruit might be expected, exceedingly few have borne in paying quantities for any number of consecutive years. Therefore, with reference to the planting of native nut species for profit, the truth of the situation is simply this: In the ordinary course of events, with the exception of the pecan, years of experimentation in the testing of varieties and in a study of their cultural requirements must be gone through before any native species of nut-bearing trees can be planted in any of the northern states with a certainty of commercial return from nuts alone which would be comparable with that of many other crops which already are upon a well established commercial basis in this part of the country.
With reference to two of the foreign species of nuts which have been introduced, the situation is quite different. In order of commercial importance of the nuts now grown in this country, two foreign species, the Persian (English) walnut and the almond, stand second and third, respectively, the pecan, which is an American species only, being first. With these exceptions, the foreign introductions are all in the experimental or test stage, and while possibly the European hazel (filbert) may now be making a strong bid for commercial recognition in the northwest, and the pistache in parts of California, neither species can yet be recommended for commercial planting.
With the exception of a few hardshell varieties of almonds, which are practically as hardy as the peach and which are suitable only for home planting, as they are in no way to be compared with the almond of commerce, there is now no indication that this species is destined ever to be come of commercial importance east of the Rocky Mountains.
The Persian or so-called English walnut is of commercial importance in this county only in the far Western States. In the South, it has thus far failed altogether. In the North and East it has held out gleams of hope, first bright, then dull, for more than a century. There is no way of telling the number of trees of this species which have been planted in the northeastern section of the country, but let us imagine it to have been sixty thousand. Of these fully fifty per cent have succumbed to climatic conditions; twenty-five per cent have been but semi-hardy, and possibly twenty-five per cent have attained the bearing age. A part of each of the last two classes have borne crops of commercial size for a number of years. Some have produced nuts of good size and quality. A great many of all those surviving are now proving susceptible to a walnut blight upon which Mr. McMurran is to report tomorrow. A liberal estimate of the present number of bearing Persian walnut trees in this part of the country would be ten per cent of the original supposed sixty thousand or six thousand trees. Of these, the writer has positive knowledge of none which are now bearing crops of nuts in such quantity, and of such size, and quality and with such regularity and which have so borne for such length of time as to encourage commercial planting. Few of the eastern grown nuts are so free from tannin as to be really pleasing to the taste, or favorably comparable with the best nuts of the market. The writer is now closely watching the best known varieties which the nurserymen are putting out, but at the present time there is no variety which, in his judgment, should be commercially planted without further testing.
The proper place for such partially improved species, as are most of the nut producers hardy in this section at the present time, is that in which they may be used for more than the single purpose of nut production. Most of the species of the botanical family Juglandaceae, to which the walnuts and hickories belong, are slow growers, and as such, are objectionable to the average planter. In answer to this, it may be said that among trees, slowness of growth is invariably associated with longevity of tree and its value when cut as timber. Also, when due pains are taken, it is possible to select species which are exceedingly satisfactory in the landscape. Several of the slides, which are to follow, illustrate the individual beauty of selected nut trees, and some show their effective use in the landscape.
Foresters are now advocating the planting of trees in waste places in the country, especially about farm buildings. There are, perhaps, no conspicuous waste places with a greater aggregate area than the strips along the public highway. In certain foreign countries, these strips are planted to fruit trees and the right of harvest awarded to the highest bidder. The revenue so obtained goes a long way toward keeping the highways in good condition. It is possible that this practice may sometime be introduced into the United States, but until public opinion is radically changed, the planting of fruit trees along the highways can not be expected to yield any satisfactory returns to the public. The experience of Dr. Morris who planted cherry trees along the public road past his farm here in Connecticut, where we have just been, is typical of what, under present conditions, might be expected in any part of the country. When the cherries were ripe, automobile parties came for many miles to pick the fruit, and when that in the highway was gone, the cherries from the nearby orchard were taken. In both cases, the branches were broken down and the trees left in badly mangled condition. Dr. Morris then tried nursery-grown and expensive evergreens, but on Sundays, automobile parties came again with spades and shovels and dug up the trees.
The ratio of population to tillable land in this country is not such that, for a long time to come, the American people as a whole will be pressed into the using of highway land for the production of crops or into respecting the right of the public to harvest such crops as might be grown in its highways. Therefore, for the present, except in densely populated, or in more than ordinarily well regulated communities, it would be useless to advocate the planting of ordinary fruit trees along the public roadways.