Northern Nut Growers Association Report of the Proceedings at the Thirty-Eighth Annual Meeting: Guelph, Ontario, September 3, 4, 5, 1947
Science
Northern Nut Growers Association Report of the Proceedings at the Thirty-Eighth Annual Meeting: Guelph, Ontario, September 3, 4, 5, 1947
Northern Nut Growers Association -- Periodicals; Nut trees -- Periodicals; Nuts -- Periodicals
Growth was reported in terms of total height for each tree. These
heights were then converted to annual growth rates for trees 3 to 8
years old and placed in arbitrary classes are follows: low (less than 1
foot) medium (1 to 2 feet), and high (over 2 feet). Test plantings in
North Carolina had the highest growth rate; those in Mississippi, the
lowest. In other states, growth rates fell between these two and were
quite similar for the most part (Table 3). Average for all trees was 1.6
feet per year. Trees averaging less than one foot of height growth per
year were slow to come into bearing. Only 14 percent of the trees in the
low growth rate class were bearing. On the other hand, 71 percent of the
trees with a high growth rate had come into bearing. Growth of black
walnut, following recovery from transplanting shock, depends on site
conditions and tree care. Trees set in fertile soil with an adequate
moisture supply and kept free of livestock and other damage make rapid
growth. Trees set in poor, thin or droughty soil do not make much growth
if they survive at all. Black walnut is very sensitive to any wounds
and, if subject to mechanical or livestock damage, growth is retarded.
Cases of exceptional growth and bearing were reported. One in eastern
Tennessee is worthy of brief description. There were two trees in this
planting set approximately 40 feet apart. One was on the edge of a
garden; the other, in a chicken run. In seven years the first tree grew
to a height of 32 feet--an average growth of 4.5 feet a year. It began
bearing in 1943 and produced a crop of nuts each year up to the time of
the survey. The 1946 crop, reported as a light one, yielded 3.5 pounds
of kernels. The other tree, shown in Figure 1, was 18 feet tall, having
averaged 2.5 feet a year. It also began bearing annual crops in 1943,
and in 1946 it had a very heavy crop for its size, yielding 2.5 pounds
of kernels. Here are two Thomas trees of the same age planted
practically side by side; one is almost twice the size of the other, but
they both began bearing annual crops three years after planting.
=Field Survey in Sample Area.= To check on the adequacy of the
questionnaire survey, 108 test plantings in eastern Tennessee were
visited and inspected. Forty of these had been reported on by mail; 68
had not. In general, the trees had been planted on the best sites
available. Some were set out in farm orchards (Figure 2); a large number
were planted in yards as combination nut and shade trees (Figure 3).
Field examination of the 40 plantings which had returned questionnaires
revealed conditions very similar to those reported (Table 4). Survival
was found to be 75 percent compared with a reported 77 percent. Average
tree height was reported as 9 feet; actual height averaged 11 feet.
There was some hesitancy in reporting tree deaths caused by livestock; 4
percent was reported while 23 percent was found. Such mortality was
usually listed as unknown on questionnaires.
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