Page:Tree Crops; A Permanent Agriculture (1929).pdf/248

 190 FACTS ABOUT CROP TREES

The cost of extracting the kernels of the walnuts from an acre of land is probably more than that of slaughtering and dressing the meat from an acre of land. However, I am not certain of this. But now machinery is being developed for the black walnut, as it has been developed for the California walnut industry—for example, the important discovery (see U. S. Department of Agriculture) that a restaurant potato-peeling machine and a small hose stream of water take the black and dirty hulls off black walnuts and clean the nuts at a rapid rate. Perhaps this in conjunction with some kind of a mechanical crusher might open a market for inferior black walnuts for poultry food on the farm, the chickens picking out the meats.