NUT GROWING AND TREE BREEDING AND THEIR RELATION TO CONSERVATION

Professor J. Russell Smith, Pennsylvania

Prof. Smith: Mr. Chairman, ladies and gentlemen; I am going to ask your indulgence for including in my subject a matter that perhaps goes a little beyond the scope of this organization, for I wish to speak of fruit as well as nut-bearing trees. Conservation, whose object is the preservation of our resources for future generations, as well as for ourselves, finds its greatest problem in the preservation of the soil. The forests can come again if the soil be left. It is probable that we can find substitutes for coal, and for nearly everything else, but once the soil is gone, all is gone; and the greatest danger to the soil is not robbery by ill cropping, because no matter how man may abuse the soil, scientific agriculture can bring it back with astonishing speed. But the greatest enemy of conservation is erosion, the best checks for erosion are roots.

Thus far, the only man who has been telling us anything about planting roots upon the hillsides is the forester. But he usually sets nothing but wood trees, which at the end of fifty or a hundred or a hundred and fifty years, we can cut down, and which, during the intervening time, have done nothing but cast shade, drop leaves and retain the soil. My doctrine is that the potentially greatest crop-producing plants are not those on which we now depend for our food, but are the trees,; that the greatest engines for production are not the grasses, but the trees. Our agriculture is an inheritance from the savage, and the savage found that he could do better with annual grains than he could with nut trees, because he didn't know how to improve the nut crop by selection of the trees, while there came involuntarily an improvement in the other crops. No man today knows the parentage of some of the cultivated plants and grains on which we now depend. Thus we came down to the present day of science, with the purely chance discoveries of savages as the main dependence of mankind for the basis of agriculture.

We have within a decade discovered the laws of plant breeding. We know a good deal more about it now than ever before and are in a position to start about it very deliberately and with a reasonable certainty that we are going to get certain combinations of qualities if we keep at it long enough. Thus the hickory and walnut offer perfect marvels of possibilities. Look around on these tables and see the size of some of these things. There are hickory nuts 1¼ inch long and there are shagbarks as full of meat as pecans and probably quite as good. There are in Kentucky, I am told, hickory nuts that you can take in your fingers and crush. Here we have the pecan, this great big shellbark from Indiana, the shagbark from the North, and the thin shell nuts from Kentucky. Now hybridize these and I think, if you work at it long enough, you will get a tree that will have all those good qualities.

The wonderful black walnut is a tree of hardiness, and the delicious Persian or English walnut is a nut of acceptable form. The pair offers splendid possibilities in their hybrid progeny.

We have fruits thus far recognized as of little value which offer great possibilities as forage producers. The mulberry bears from June to September and the persimmon from September till March and the pig harvests them himself.

We have the possibility of a brand-new agriculture, depending not upon grains, but upon tree crops, provided someone will breed the crop-yielding trees which we can use. This will permit us to use entirely different kinds of land from that now considered best for agriculture. The natural necessities for plant growth, I believe, are heat, moisture, sunlight and fertility. Now they are not all the limiting factors with man, because man adds the fifth, the arbitrary fact of arability, and that right away bars out about half of the fertile earth, because when we insist on heat, light, moisture, fertility and arability, we leave out that rough half of the earth equally fertile, idle, subject only to the work of the forester, who will give us a forest about 1999. It might just as well be planted with a host of crop-yielding trees, the walnuts, hickory nuts, pecans, persimmons, mulberries—and the list is very long. There are at the present time in use in Mediterranean countries twenty-five crop-yielding trees other than the ordinary orchard fruits. I am told that they have oak trees there which yield an acorn that is better than the chestnut. A pig will fill himself with acorns on the one hillside and with figs on the next hillside and then lie down and get fat. We are too industrious, we wait on the pig; I want the pig to wait on himself.

But who is going to breed these things? These crop yielding trees? A gentleman told us this morning that he was not nervous, that he could watch a hickory tree grow, and stated that he had forty acres of land and was breeding trees for fun. Here is Dr. Morris, who is having a delicious time doing the same thing. We should not have to depend on enthusiasts who are working for fun; we must not depend on such sources for the greatest gifts in the line of food production that man can imagine. This work should be done by every state in the Union. I believe that it is capable of proof that we can get just as much yield from a hillside in untilled fruit and nut-yielding trees, as we can from putting that same hillside under the plough and getting wheat, corn, barley, rye and oats and a little grass once in a while. It will make just as much pig or just as many calories of man food from the tree crops as it will make under the plough. And under the plough that hillside is going down the stream to choke it and reduce the hillside to nothing.

We have three classes of land. The first class is the level land, which belongs to the plough now and for all time. The third class, which is the unploughable steep mountain and hill land, is probably as great in area as the level land, and between the two is the hilly land that we are now cultivating to its great detriment, visibly reducing the earth's resources by bringing about rapidly that condition which has led to the saying in the Old World: "After man, the desert." The Roman Empire, where men have had possession for two thousand years, proves, "After man, the desert." It is equally proven in much of China, but it can be prevented if these hill lands are put to trees. But we cannot afford to put those lands into trees unless the trees yield.

I move that this Association memorialize those persons who are in position to promote the breeding of fruit and nut-yielding trees, that we may bring nearer the day of tree-crop agriculture. I want a letter to go from this Association with the authority of the Association and its sanction, to the Secretary of Agriculture at Washington and to all the men in authority in the Bureau of Plant Industry at Washington, to the Presidents of the State Agricultural Colleges, the Directors of Experiment Stations and professors who are interested in plant breeding. That will make a list of three or four hundred persons and involve an expenditure of a few dollars but I believe it will be productive of good. I hope that the Association will see fit to lend its name and a little cash to that proposition, because if we can get the authority of the state and the money of the state, the results will come much more rapidly than if there are just a few of us doing it independently. (Applause.)

The Chairman: Will someone put Prof. Smith's suggestion in the form of a motion?

A Member: I move that it be referred to the Committee on Resolutions.

(Motion carried.)

Mr. Corsan: Undoubtedly we all agree with Prof. Smith. He spoke of the persimmon. When I speak of the persimmon in my country nobody knows what I am talking about. I found two trees in Battle Creek, Michigan, in a front yard. The person who owned them was an old lady. I said, "Will you give me these persimmons?" She said, "Yes, take them all; the neighbors come here and while they are getting the persimmons they bother me a lot. Everybody seems to like them." They were delicious persimmons that were quite edible before frost, they are probably the two furthest north persimmon trees in the world. I went a little way around Devil Lake, and found pawpaws. They are a very good fruit when cultivated. The idea of preserving the soil and not sending it all into the Lakes and down into the Gulf of Mexico—that is a good idea of Prof. Smith's.

Mr. Gardner: I submit that that Battle Creek woman should start a new breakfast food. (Laughter.)

Mr. Corsan: Every second year there is an immense crop on one of the persimmon trees; they are a male and female, I think. You can't see the branches for the fruit, and the thermometer there falls to 22 degrees below zero.

The Chairman: You can graft the male trees with pistillate grafts if you want to, or you can transfer grafts both ways. The persimmon and pawpaw will undoubtedly both grow at Toronto. They are not indigenous there because of natural checks to development in their sprouting stage, but if you buy Indiana stock for Toronto, such transplanted trees will both grow there, I am sure. This is not quite relevant to Prof. Smith's paper. It seems to me that Prof. Smith gave us a very comprehensive resumé of facts bearing upon the situation, perhaps not particularly calling for discussion. We are very glad to have his arraignment of facts.

The next paper on the program will be that of Dr. Deming. While Dr. Deming is getting ready, I would like to have the trees shown. Mr. Jones will speak about his pecans, these specimens of young trees here.

Mr. Jones: These are pecans that Mr. Roper brought up from the Arrowfield Nurseries. (Here Mr. Jones described the trees.)

The Chairman: Would those trees grow after they have been dried as much as that?

Mr. Jones: I don't think so; pecans don't stand much drying.

The Chairman: No, unless you cut off all the roots.

Prof. Smith: If we should dig up a tree like this and cut it off a foot and a half down, would it be all right to transplant it?

Mr. Jones: Yes, if your season should not be too dry.

The Chairman: What has been your experience with the Stringfellow method of cutting off every single root?

Mr. Jones: We cut the tap-roots off, but leave an inch of the lateral roots.

The Chairman: I think you can do better by following the Stringfellow method and cutting off all the laterals.

Prof. Smith: If you were going to transplant those for your own use where would you cut them off?

Mr. Jones: About here, a foot and a half down.

The Secretary: And the top?

Mr. Jones: Yes, sir, I'd reduce the top about that much; I think we will have to work for a better root for the North.