Pecan improvement work is only in its beginning. The Oklahoma Pecan Grower's Association was organized in 1926. It is devoted to the general improvement of the pecan, and to the dissemination of information gained by the members from their experience and observation. Dr. Frank Cross, head of the Department of Horticulture of our A & M College at Stillwater, is very active in nut improvement and is giving us much valuable assistance. Early in the history of our association we began to graft the large improved varieties on our seedling trees. True, many mistakes were made. I recall when all our trees producing small and inferior nuts, were cut down level with the ground, and the sprouts growing from the roots, were budded or grafted to paper-shells. This meant a long wait for production. We soon realized it was better to stub back the limbs and graft these, or permit the sprouts to develop and bud them, plus saving most of the framework of the trees, which gives us heavy production of grafted pecans in a short time. Competing growth, that is underbrush and all kinds of trees other than pecans, rob the grove of moisture, sunlight, and plant food. This growth was formerly removed by hand grubbing, but now with a large bulldozer it is pushed right out of the ground into piles where it is burned. Now the ground is clean, no stumps to grub out, and ready for a cover-crop or clean cultivation. Nothing remains but pecan trees, some elm, hackberry and oak, too large for the bulldozer. These are poisoned and burned right where they stand the following winter. For poisoning a mixture of two pounds of white arsenic and a pound of caustic soda to a gallon of water, if applied from an oilcan with a spout in an open circle chopped in the bark so as to girdle the tree, will usually deaden it in a short while. Within the year nothing is left but pecan trees. These are watched carefully for production and shelling quality and, if not desirable, or standing too thick, are removed for greater spacing for permanent trees. Today, only the smaller pecan trees are top worked, either to named varieties or to selected seedlings. Due to changed conditions of market and labor, the native pecan has come into its own. The pecan sheller buys 90% of the native pecans. He will pay only a few cents more for the big paper-shell. The native pecan is as staple as butter and eggs. Every produce man buys them for the shelling plants. This leaves the big paper-shell to seek a special market at an advertising cost. Due to the small differential in the wholesale price of the native and the paper-shell, the larger native trees are no longer top-grafted but are encouraged in every way for heavy production.