Part 12
With apologies for personal reference, the demands of my small commercial nursery on my time and attention have become so heavy that I am faced with the necessity of either building a permanent organization of skilled workers or dropping out altogether. Due to advancing years and other considerations I am choosing the latter course. Because of this I feel free to make certain remarks as to the future of nut tree production that I would hesitate to make if I were still in the business.
Without doubt many of the large commercial general nurseries will take up the growing and selling of nut trees. We who have pioneered in this work, should welcome the increased public interest that will result from the more extensive advertising and cataloging of nut trees. The specialist who has worked out propagation, pollination and variety problems should be more than able to hold his own against the competition of newcomers in his field, however large.
As all old-timers know, there are certain factors in the growing of nut nursery stock that do not lend themselves to the mass-production methods of the large general nurseries. Stocks, generally, take longer to produce. It may take as much as six years to produce a saleable hickory tree from the time the seed is planted. Failures in grafting and budding walnuts run high, especially with beginners. A catch of twenty-five per cent means either selective hand digging must be resorted to or seventy-five per cent of the seedling stock must be sacrificed if power digging is used.
Suitable grafting stock for chestnuts is still a matter of controversy. Good authorities claim that Chinese chestnut is unreliable as a root stock while others, including myself, as stoutly maintain that the main need is for proper technique in grafting and budding. These and other considerations, including the training of workers in improved technique, offer certain obstacles to the newcomer which, in turn, offer certain temptations that may result in harm to the whole movement toward nut tree planting.
To be specific, the difficulty of producing good grafted or budded trees of named varieties may readily tempt the less scrupulous to sell any kind of nondescript seedling, while at the same time giving the public the impression that superior stock is being offered. This is, in fact, already being done. I have before me the catalogues of three large general nurseries. One of them offers what are obviously seedling Chinese chestnuts in these words: "Only two years from now, right on your own grounds, you can pick up big, fat, tasty chestnuts from the trees you plant this year."
Of English walnuts--no variety name given and quite obviously seedlings--the following description is given: "Thin-shelled, large, delicious nuts, producing heavy crops and demanding good prices". In both these cases the prices asked are as high or higher than good, grafted, named varieties can be bought for elsewhere.
The second catalogue offers seedling black walnuts, not so designated, and also "Thomas Improved" black walnuts at a higher price. Seedling English walnuts, not stated as such, are offered as having commercial possibilities and being as good in quality as those grown elsewhere. The third catalogue is entirely ethical and legitimate. It lists a limited assortment of well-selected varieties under their true names.
When misguided buyers purchase a seedling chestnut tree with the expectation of "picking up big, fat, tasty chestnuts in two years from planting" and realize a handful of nuts after ten years of waiting, or nothing but empty burrs because of lack of pollination, nut tree planting gets a black eye. The same is true when the buyer tenderly nurses a weak-rooted English walnut seedling for fifteen years before he gets a few small, thick-shelled, astringent nuts.
When nurseries that show honesty in their advertising write me for information I give them the best I have. When their advertising is otherwise I do not trouble to answer. One party, after asking many questions, wound up by saying he wanted "to get in on this nut game." My impression was that if he had said "shell game" he would have more accurately stated his case.
Buyers should be on their guard not to be deceived by flowery, but vague descriptions. If catalogues list nut trees by recognized variety names it is pretty safe to assume that the trees are as represented. If recognized variety names are omitted the trees may safely be considered to be seedlings and that they will produce a wholly unknown quantity, no matter how alluring the advertising. Of course, this is not intended to discourage the planting of new varieties offered by nurseries of known reputation for integrity, nor of such strains as the Crath Carpathian walnut importations, from which new varieties are emerging.
As a practical note I wish to state that the black walnut is by far the most satisfactory stock on which to graft walnuts of any species. Not infrequently seedling English walnut trees take from ten to fifteen or more years to come into bearing. I have fruited fifteen or more varieties by grafting on black stocks, and in no case has it required more than five years for the trees to bear. Frequently they have borne in two or three years. The English walnut is also a more vigorous grower on black walnut roots than on its own.
The Sherwood butternut grafted five or six years ago on butternut stocks has not borne yet; grafted on a small black walnut in the nursery row in 1942 it bore one nut in 1943 and has many staminate buds for 1944 visible at the present time. Walters heartnut bears the second or third year on black walnut; it has not borne for me on butternut after seven years. The same holds good for the other heartnuts.
In the grafting of chestnuts, defective (incompatible?) unions can generally be spotted the first year. They develop with a transverse fissure into which the bark ingrows. Good unions show new tissue entirely around the closing wound; the final scar as healing approaches completion being vertical, i. e. longitudinal with the stock. This result can be obtained by proper technique.
The members of the Association can do much to further the cause of nut tree planting by discrimination in recognizing the ear-marks of honest advertising and encouraging their friends to make their purchases from conscientious, responsible nurserymen. Our Association nursery list is a valuable help in this direction.
Report from the Tennessee Valley
_By THOMAS G. ZARGER, TVA, Norris, Tennessee_
_Black Walnut Industry_--in the early fall of 1943, a survey was made of the black walnut industry in the Tennessee Valley and Nashville Basin. Four commercial cracking plants had shelled 10 million pounds of nuts purchased in 1942. This year, cracking plants have offered to buy unlimited quantities of nuts in the shell at the relatively good price of $4.50 per 100 pounds. Because of the manpower shortage, especially on the farm, the collection of nuts has not exceeded the preceding year. Pasteurizing plants had processed a quarter of a million pounds of kernels purchased in 1942. This year only three pasteurizing plants will operate, and a smaller quantity of kernels will be processed. The kernel supply from the home-cracking industry has decreased because the sanitation requirements of the Federal Food and Drug Administration are difficult to meet in the homes.
_Bearing Habits of Wild Black Walnut_--Looking forward to a fuller utilization of the wild black walnut crop, the bearing habits of the black walnut tree is being investigated. Four-year records are now available on tree growth, nut yield, and nut quality of sample trees located throughout the Tennessee Valley. For 121 trees, with a range in diameter from 4 to 28 inches total dry nut yield, in pounds, averaged as follows: 1940, 31; 1941, 24; 1942, 38; 1943, 29. There is some evidence of alternate bearing, with a heavy crop followed by a very light crop. How much larger nut crop a larger tree is expected to bear was found to increase on an average trend from 0 pounds of filled nuts for a tree of 4-inch diameter to 65 pounds for a 24-inch tree. Judged on the basis of nut quality, only one of the sample trees compared favorably with standard propagated varieties of black walnut. Filled nuts on the average, amounted to 83 percent of total nut crop weight, and had a total kernel percentage of 21. Recovery of marketable kernels averaged 17 percent of total nut weight. In order to learn still more about the bearing habits of the black walnut, records on all sample trees will be carried on for two more years.
_Macedonia Black Walnut_--A sample of black walnuts from a tree growing on the home place of Mr. N. U. Turpen at the Macedonia Community at Clarksville, Georgia, were sent to us for evaluation in 1939. The nuts were thought to be two years old--from the 1937 crop. When tested, the kernel content averaged about 40 percent--the highest on record for a black walnut. The tree, supposed to be the one which bore the nuts we tested, had not borne any appreciable amount since 1937. Since the tree yielded good crops in 1942 and 1943, we are now in a position to report further on the Macedonia walnut. Based on cracking tests of nut samples, the average nut weight and kernel percentage were 16.8 grams and 28 percent in 1942; and 16.4 grams and 29 percent in 1943. It is apparent that the Macedonia black walnut has not exhibited those exceptional characteristics of thinness of shell and high kernel percent which were found in the original sample tested.
Report from Minnesota--Letter from Carl Weschcke to Miss Mildred Jones
The winter of 1942-43 was the most damaging on fruit and nut trees within my experience of 25 years in River Falls, Wisconsin. The main reason was that we had a long wet fall and all vegetation was in a succulent green condition when our first snow storm of September 25th hit us. For other details of this winter and the Armistice Day storm of 1941, the second in its deleterious effect on horticultural varieties, please write Mr. C. G. Stratton, Coop. Observer, of River Falls, Wisconsin, who is in charge of the U. S. Government weather bureau there. Mr. Stratton furnished me with an affidavit showing one of our very coldest winters in which the temperature went down, in February, to 47° below zero. This was in 1936. This winter of extreme cold did very little damage to trees, and an apricot on which I had taken out a plant patent, subsequently called the Harriet apricot, went through this winter without any damage and bore fruit the next year. This gave me such confidence in its hardiness that I began to propagate it for sale. The winter of 1942-43 wiped out practically all of the apricot trees of this variety and all of the early Richmond cherries that had been growing on my farm for nearly twenty years. It killed more than half of the catalpa trees which were nearly as old. It also killed outright a large Stabler black walnut which had been grafted on a Minnesota seedling nearly twenty years previous. This was a fine large flourishing tree that bore each year and I had thought because of this behavior that Stabler was to be considered one of the hardiest of the black walnuts. It had stood up better than Thomas many winters. I could go on enumerating failures of many other varieties and species but it is a long story and a sad one.
To make this report more concise I will now give you my opinion as to what is hardy under these severe tests. To begin with, one of your father's hazel hybrids, of which I have two bushes, stood all of this very well. These bushes, which are perhaps fifteen years old, are still flourishing, although the main trunks are decaying rapidly. Several of the sprouts are blossoming freely. These two bushes have borne only one crop of nuts, although they blossom freely, and the catkins are about as hardy as anything in the filbert line that I have seen. The reason for their not bearing is lack of pollination. I never did find out what was satisfactory, even at the time that I hand-pollinated them to get a crop of nuts. The nuts are much more satisfactory than Winkler or Rush hazels. The Rush is absolutely worthless here; is subject to blight and is very tender to our winters. The Winkler is a very hardy variety, bears something every year. The trouble with the Winkler is that it matures its nuts so late, much later than the Jones' hybrid. I never have propagated your father's hybrid for sale as I did not know a hardy pollinizer for it. I have sold a few Winklers, recommending them for proper locations. I have one Winkler planted by a small lake cottage up at Delta, Wisconsin. This is about thirty miles west of Ashland, Wisconsin. This territory is very uncertain for successful corn raising so the Winkler is quite a hardy bush.
Four hybrid plants that bear worthwhile nuts, which grew from seed planted in 1933 and 1934, are perfectly hardy, almost as hardy as the native wild hazel and hardier than any other worthwhile filbert or hybrid that we have. This hardiness is no doubt due to the fact that the mother plant was an ordinary wild Wisconsin hazel. These hybrids, from the native hazels, we call "Hazilberts," and have obtained a United States trademark on all plants produced after this manner. Here again I have not recommended nor sold any of these because of my lack of knowledge as to the correct pollinizer; this has yet to be developed. They do not pollinize themselves nor do they pollinize each other satisfactorily. They have all the finest characteristics that you could ask for except prolificacy which may be due to the lack of a proper pollinizer. They are the most resistant to the hazel blight of anything that I have worked with so far in 25 years. Hard winters, such as we have had recently, have no deleterious effect on them. They blossom and do not lose any of their wood and apparently there is no injury. They are very vigorous plants and can be trained to a single tree standard or they make very tall-growing vigorous bushes. I have placed these filberts and their hybrids first on my list of recommended trees because they are going to be the backbone of nut tree production.
I have nearly one hundred experimental European filberts, mostly of wild varieties, of which about a dozen are hardy both in pistillate and staminate bloom, even in our most severe winters, although of this dozen only about two or three have nuts which could possibly be considered commercial. Practically all of these are being injured in one way or another by the blight. Many have passed out of existence and only two or three have been able to resist the blight so that it doesn't seem to make any headway. I do not do anything for a blighted filbert--it must take care of itself. I have experimented along these lines, however, using chemicals and other means of protection. I do not know of anything adequate except to build resistance in the plant itself through cross-breeding.
The next really successful plant is the Weschcke butternut. This is a native butternut which I discovered on my own farm. Every local woods has butternut trees in it. We must have at least five hundred butternut trees in our woods; they are subject to some kind of a bark disease but this seems to encroach on the life of the tree very slowly since trees that I remember showing signs of this disease nearly twenty years ago are still living. They are awful looking sights, however, by this time. Such large trees that have developed this blight are possibly in the neighborhood of fifty years old. The Weschcke butternut is a medium size to small butternut. Its great value lies in the fact that it splits exactly in half and the shell structure is so shallow that by merely turning the nut upside down the kernel falls out--nothing to hold it in the shell. Very frequently the kernel stays absolutely intact, its wings being held together by the little tender neck joining them at the point of the nut. The nut kernel is tender and light colored. The difficulty here is grafting them on black walnut roots; after they are grafted they grow very rapidly and bear at once. I have had them bear the first year grafted.
Next in line of hardiness and reliability is the Weschcke hickory. This is now an old-timer; since its successful grafting in 1934 it has borne an ever-increasing crop every year. This is not to be measured in bushels, however, but in pounds. No other hickory nut has begun to touch it, in its regularity, reliability and its quality: that is, no hickory so far north. It is the thinnest shelled hickory of any that I have ever tested out, and releases its kernels about the best of any. It has one fault, however; the staminate blossom is abortive, never produces any pollen. It needs a pollinizer and we have been recommending the Bridgewater and the Kirtland which we know by actual experiments have produced pollen in large amounts, sufficient for pollinization of this tree. Even before Kirtland and Bridgewater pollens were available those trees, grafted to the Weschcke, bore hickory nuts every year, but in very small quantities. I am now quite sure that they borrowed pollen from the wild bitternut trees which are in abundance nearby. There is also the other possibility, which has not been conclusively proved, that this variety is a parthenogen. Innumerable hard frosts in early springs have destroyed butternut crops and walnut crops, but these hickory nuts invariably come through such seasons and escape the early fall frosts, which come in September, for the reason that the nuts are matured usually the second week in September. We therefore can recommend the Weschcke hickory freely. We have not determined how far north it can live, but I believe the 45th parallel is very safe, and as far west as the Dakota line. It originated at Fayette, Iowa, and probably would thrive far into the south. It grafts extremely well on the wild bitternut hickory root which is about the hardiest known. Your father was very partial toward it as a stock. This root system does not handle all hickories by any means. In all my trials using pecan scions the only pecan which grafts well on it and survives indefinitely, is the Hope. This is also a very hardy tree but we cannot recommend it as a nut tree because we have never seen the parent tree bear any nuts. The parent tree is now twenty years old. Quite a large tree but no nuts. It is growing in an unfavorable location for bearing since it is shaded by much larger trees. It is growing right here in St. Paul.
The Bridgewater and the Beeman are two more hickories which are very hardy and which come into bearing quickly, also are successfully grafted on bitternut root. They do not mature their nuts so reliably nor so early by any means as the Weschcke. For a little further south they might be very reliable. They are fully as hardy and satisfactory in every other respect. The hickories that have proved to be fairly hardy but have produced very few nuts are the Cedarapids and the Kirtland. The Beaver hybrid hickory is probably next for nut production satisfaction, grafts well on bitternut root but does not seem to have a long life. The trees that I bought from your father nearly twenty years ago are now dead although they lived to become large fine trees and bore in some seasons very nice crops of nuts. The Fairbanks hickories, grafted some seventeen or eighteen years ago, are still surviving, but bear very few nuts, some seasons practically nothing at all. They very seldom ripen as they mature very much later than the natives or the other varieties mentioned above. I do not consider the Fairbanks a very edible nut anyway as they become very rancid after a couple of months. The Beaver is not a good keeper either. This is rather an important characteristic in a nut and one in which the Weschcke excels, as in ordinary office temperature it usually keeps two or three years. I believe that this is partly due to the thin shell. My theory is that the thin shell expands and contracts with heat and moisture conditions without cracking. This prevents air from getting at the kernel, and since it is the oxygen which is mostly responsible for rancidity, this exclusion of air probably accounts for the fresh state that these nuts maintain for a long time. I have noticed that thick-shelled shellbarks and, to a lesser degree the shagbarks, crack open, in minute hairline cracks, and these nuts which split like this invariably soon become rancid.
Now the black walnuts are next in order. For many years I considered the Ohio a worthless variety. They would seldom mature any of the nuts, and although they were regular bearers the thick hull was a nuisance. I have had twenty years' experience with this variety and they are the hardiest of all the old ones. They stand up very well and each year the nuts become a little more satisfactory. Evidently the trees have the ability to acclimatize themselves and they stand up better than Thomas, Stabler or Ten Eyck of the old varieties that I have tested.
More recent varieties which I have tested and have proved satisfactory, are the Paterson and the Rohwer; I recommend these two above all other black walnuts. I have two seedlings which I am watching with a great deal of interest. One is from Minnesota and the other is a failed grafted tree which sprang up from the root and so far is beginning to bear prolifically a medium sized nut with a rather thick shell which does not crack out very well but the quality is superb. It has a thin hull which you can pop off by merely pressing your thumb against it after it is thoroughly dry, coming off very clean leaving a good looking nut. The kernel is very light straw-colored and you can generally get them out in good pieces, about one-quarter of the whole kernel. Above all it matures very early, about the middle of September or sooner, and this is the deciding factor for any nut, because, no matter how well It cracks, how prolific it may be, or hardy, if you do not get a ripe nut you have nothing for here in the north. I feel quite certain that this is going to be the standard black walnut for the north. For want of a better name I have been calling it the "Ruffy" because the hull, when green, has a pimply surface and a rough appearance.