The Floyd pecan.—This is another supposed-to-be hybrid, and of the same species of hickory as the last; but the one nut which I received differed from the Nussbaumer by being somewhat larger, and the shell with more prominent ridges and a little thicker. It was said to have been found somewhere in southern Indiana by a Mr. Floyd, who, believing it to be of great value, refused to give any information likely to aid any one else to locate the original tree, neither would he part with any of the nuts except the one specimen which eventually came into my hands. Of course all horticulturists know that seedlings raised from such freaks among nut trees are far too uncertain to be of much value, but ignorance in such matters often leads the possessor of an article slightly differing from the ordinary to permit his imagination to warp his good sense.
Cultivation of the Hickories.—The hickories have been so seldom planted in our Northern States for any purpose, that anything like a systematic cultivation of these trees is a thing almost unknown. Of course there is no good reason why the hickories should not be multiplied and cultivated as well as other kinds of trees, but in some unknown way the idea became prevalent that these trees could not be transplanted with any assurance of success, and this has been kept alive, either through ignorance or by those whose interest led them to encourage the planting of the rapid-growing and easily propagated kinds, instead of those which, though less profitable to the producer, would be of far greater value to the purchaser. It must be admitted, however, that the hickories are not so tenacious of life as the willows, poplars, elms and similar kinds of trees, requiring more care in their cultivation if they are to be transplanted when of a proper size for setting along roadsides or elsewhere, for shade and ornament, but they are certainly no more difficult to make live than the beech, oak, tulip and various species of the magnolia.
The slow growth of the hickories while young is another objection often urged as a fault of these trees, but there is nothing lost but time in waiting, and this passes just as swiftly whether we plant trees that may in ten years yield a golden harvest, or nothing but leaves; besides, the hickories respond as readily to stimulants and good care generally as the common fruit trees of our orchards. While the farmers of our Northern States are generally quite indifferent as to what becomes of their old hickory trees, and seldom attempt to preserve the wild seedlings that spring up in the fields and on the borders of forests, their fellow countrymen of the Southern States have, within the past two or three decades, discovered that they possess an inexhaustible source of wealth in their common pecan nut. Formerly these trees were sacrificed whenever a choice piece of tough timber was wanted, and often merely to secure the entire crop of nuts without waiting for nature to drop them within reach; but the advent of many lines of railroads, steamboats, and other means of communication with the great cities and their markets, has changed this inclination to destroy into one of preservation. The old pecan trees are not only appreciated as a source of income, but thousands and tens of thousands of seedlings are now annually raised and planted, to insure larger returns in the near or distant future. In fact, pecan culture has already become an important industry in several of the Southern States, although in point of age it is little more than a fledgling. We have no statistics to show what the annual crop averages in pounds or bushels, but it must be something enormous if we make our estimate from the quantities received and distributed in the Northern States. But with all the efforts put forth to secure a supply of these nuts, and the high prices they command at both wholesale and retail, the demand seems to keep well in advance of the supply, and this will, in all probability, continue as our population increases. In the way of demand, the same is true with our northern species of the shellbark hickories, which were formerly very abundant, but of late years have become rather scarce, for reasons too obvious to call for any explanation at this time.
In selecting a location for planting and cultivating the hickories, including the pecan, a moist, deep soil is certainly preferable to any other, especially for the three species and their varieties most promising for this purpose, because we find them growing wild in such situations and soils. But while these naturally deep, rich and moist soils are to be preferred, no one need hesitate to plant hickories on light, dry, and even poor soils, if they are properly enriched, or a few shovelfuls of fine old stable manure is thoroughly mixed with the earth in which the roots are set, and then a mulch applied to the surface to keep the soil moist. Almost any old waste fibrous material, such as leaves, straw, hay, weeds or coarse manure, will answer for mulching newly planted trees, and it should be applied to a depth of three or four inches, and renewed annually, or as often as necessary to prevent the growth of grass or weeds growing within three or four feet of the stem of the tree. In all dry climates and soils mulching should be considered an important operation, not to be omitted until the trees are from six to ten years old, and it may usually be continued a longer time with benefit.
Propagation.—All the species of the hickory are very readily grown from nuts gathered when ripe and planted within a few weeks; or they may be mixed with or stratified between layers of sand and light soil and buried in the open ground for the winter, and the planting deferred until the following spring. They are not at all delicate and will withstand considerable drying and neglect, and will grow, if stored in a cool cellar, without being packed in either soil, sand or other material. But as I have had no occasion to determine how much neglect these nuts will withstand, nor to what extremes of adverse conditions it is safe to subject them, I shall leave investigation in this direction to others, because in general practice no valuable seed or plant grows any too readily and freely to satisfy the cultivator, and for this reason I recommend either planting hickory nuts in the fall, or burying them between layers of light soil or sand, sifting out and planting early the following spring. If any considerable quantity is to be planted they should be dropped three or four inches apart in shallow trenches and covered about two inches deep. The distance between the rows may be from two to three feet, depending upon the implements to be used in their cultivation.
The soil for a seedbed should, of course, be made rich and deep, or the same as recommended for chestnuts, and all the means usually employed to assist the growth of cultivated plants are applicable to nut trees. I may also add that cutworms, white grubs and other noxious insects are enemies of nut-tree seedlings as well as garden vegetables. The seedling hickories should be treated as advised for chestnuts; that is, dug up when one or, at the latest, two years old, and their central or taproot shortened to at least one-half their original length, and then reset in nursery rows, and at a distance of twelve to fifteen inches apart in the row. If grown in ordinary upland, the transplanted seedlings will make a better growth if heavily mulched than under the usual system of clean cultivation, and it is usually less expensive; besides, by keeping the surface of the soil cool and moist, we encourage and assist the production of fibrous lateral roots, which, as a rule, are none too abundant on seedling hickories, no matter under what conditions or system of cultivation they are raised.
When the seedlings have grown in the nursery rows two or three years, they will probably be large enough for planting where they are to remain permanently; but if, for any reason, they are not disposed of, then they should be again transplanted,—the larger roots shortened,—and re-set in good rich soil. The object of transplanting is to insure the production of small fibrous roots, and a frequent renewal of the same, close to the main stem or stock, as long as the trees remain in the nursery, whether this be two or twenty years. This is somewhat of an expensive operation, but the value of stock thus handled is enhanced far more than the cost of such transplanting, and purchasers are, or at least should be, willing to pay a fair price for such trees.
It is the natural habit of the hickories, as well as many other kinds of deciduous trees, to produce in their earlier stages of growth rather large, deeply penetrating, naked roots, with few small fibers, and in this condition they are not so readily and successfully transplanted as the kinds possessing a more ramified root system. This, perhaps, has misled many persons to believe that certain kinds of trees, like the hickories, could not be moved at all, or at least not with any assurance of being made to live. This idea has become so prevalent among inexperienced cultivators, and, I regret to add, often reiterated by theorists, that it has discouraged many who otherwise would have raised and planted nut trees in preference to other kinds.
Admitting that it is the general habit of most kinds of forest trees to produce deeply penetrating taproots, when grown from seed, it proves nothing more than that these parts may be of some importance to the plants while they are young, and under natural conditions, yet they are not absolutely necessary, and, at most, are only temporary organs, like the tails of tadpoles, always disappearing with maturity.
Any one at all observing, and having had an opportunity of examining limited or extended areas of forest trees thrown over by hurricanes, must have noticed that no tree of any considerable size and age possessed a taproot, but had been for years kept in its upright position by lateral brace-roots, and through these it had also obtained nutriment from the surface soil. Some of my correspondents in the South have expressed their surprise at not finding any trace of the original central roots on old pecan trees, when blown over by severe wind storms. But it is the same everywhere with forest trees and where the soil is naturally loose and moist: the principal or supporting roots spread out widely and remain near the surface, and the central roots or taproots disappear much earlier than in dry soils.