Many smaller plantings of nut trees have been made throughout the midwest and thousands of seedling trees having been top-worked.
Most of the native walnut trees through this section have been cut for timber and the native chestnut has been killed by the blight, making a shortage that should be replaced with the better varieties of walnut and the Chinese chestnut.
The earlier plantings of the Persian walnut from France and England were not hardy in the midwest but the Carpathian walnut from Poland seems to be doing well.
Some parts of this territory are suitable for almost any kind of nut trees. There is a vast field in the Midwest awaiting development in nut culture.
Some Aspects of the Problem of Producing Curly-Grained Walnut
L. H. MACDANIELS, Cornell University, Ithaca, N. Y.
About 15 years ago a tree of the Lamb Curly Walnut was planted at Ithaca, N. Y. After the tree had grown to a height of about 12 feet, it was topworked about 8 feet from the ground to scions of the Cornell variety of Black Walnut with the idea that it would be possible to grow a trunk of curly walnut and a top of a named variety. The tree grew rapidly and in the fall of 1952 had a trunk 10 inches in diameter at the base. Sometime in 1952 the tree became infected with bunchy-top disease and was cut in an attempt to eliminate this disease from the premises. It was expected that the trunk would show figured curly grain and plans were made to have at least a part of the log cut into veneer. On cutting the tree, however, and examining the wood, there was no evidence of curly grain detectable either by casual personal observation or from samples sent to the Forest Products Laboratory at Madison, Wisconsin. This, of course, was a disappointment because J. F. Wilkinson had shown samples of walnut grown from scions of the Lamb Walnut obtained from the late W. B. Bixby which showed evidence of curly grain. A photograph of the wood secured from Mr. Wilkinson is shown in figure 1. Wood samples from a tree growing at Beltsville, Maryland, which was also secured from Mr. Bixby by C. A. Reed, does not show evidence of curly grain.
The simplest explanation of the failure of the tree in Ithaca to show curly grain would be that somehow the tree was not properly labelled or that scions were mixed in propagation and that the trunk was not derived from the original Lamb Curly Walnut. However, the fact that only a few trees were concerned makes it improbable that trees were mislabelled in the Ithaca planting and there is no good reason to believe that the tree planted at Beltsville was not authentic.
[Illustration: Fig. 1. Radial face of wood of grafted Lamb black walnut grown by J. F. Wilkinson. Wavy or curly grain is apparent on right side which is the outer part of the log (about natural size).]
Another possibility is that the original Lamb Walnut was a chimera. Such a tree would have mixed tissues in its growing points, some having the curly grain character and others not. In such a tree some scions would produce curliness and others straight grain. It may be that these were mixed in the original collection.