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.