At present we can make a tree that will produce 500 pounds of walnuts in 25 to 30 years. With 12 trees to the acre, will give 6000 pounds of nuts; two and one-half times that of wheat at 40 bushels per acre, and they will not require the expensive refrigerator cars and rapid transit of perishable fruits. TRAINING THE TREES It will only be necessary to train the limbs in seven or eight feet all round to be able to double the number of trees to the acre. Then train the trees skyward and increase the number of nut-bearing boughs, and the yield will be increased accordingly. If the nuts on the higher branches fill as well as on the lower, the tree can not be made to grow too high, because we have no violent storms to throw down the trees, and the nuts are self-gathering. These and many other valuable and interesting problems in the industry are to be worked out. According to Prof. Lewis, who is good authority, a later and better method is to cut the young tree back to 4 feet and make it throw out three or four laterals. When these laterals are fully grown, bind them up in a bundle one or two feet diameter with soft strands of rope. In the dormant season cut these laterals back to about two feet. This will multiply the branches. Cut back the new growths again the next year, and so on; this will greatly increase the nut-bearing boughs and will train the tree upward. This seems to be the most sensible method of pruning yet proposed. NO DISEASES INJURE OREGON WALNUTS The soft, moist atmosphere of western Oregon, so favorable to the English walnut, seems wholly unfavorable to pests that destroy the crop in other climates. A crop has never been lost or materially injured in Oregon through these sources; in fact, so free are the Oregon trees of such enemies that little thought or attention has been given to this phase of the subject. In a few localities where caterpillars have attacked the foliage they have been quickly eradicated by an arsenic spray. Fumigating will kill insect life. A bacterial disease that has made its appearance in California has not been seen in this state. Winter spray of lime and sulphur will kill moss and lichens, which are about the only parasites that attempt to fasten on Oregon walnut trees. [Illustration: _Old Walnut Trees Planted About 1850 Near McMinnville, on the Yamhill River_] [Illustration: POLLINATION The Walnut] POLLINATION