Black Walnut
Already the black walnut had been referred to in this article. In its further behalf may be said that like the pecan it is one of America's most rapid growing valuable trees. It does not grow with the speed of a poplar, a willow, or a linden. Neither does any other tree of value or longevity. Two 6-year-old trees of the eastern black walnut grown in the Wiliamette Valley of Western Oregon, bore approximately a peck of nuts apiece, in 1919, when they were photographed by the writer. In good soil and under favorable conditions of growth, it will be seen that the black walnut is not always slow in developing but that it is sometimes a rapid grower.
Three varieties of black walnut are now available from the nurserymen. They are the Thomas from Pennsylvania, the Ohio from some 20 miles south of Toledo, and the Stabler from Howard County, Maryland 15 or 20 miles outside the District of Columbia. All are prolific, precocious and of superior cracking quality. The Thomas was discovered and first propagated some 30 years ago. The young grafted trees show a tendency to begin bearing in the nursery rows.
At the present time, the black walnut is regarded as being of greater promise for planting in the northern states than is any other species either native or introduced.