. (F-443112, 447815) Figure 1. — Two views of the Aurora jack pine direct seeding. In 1936 the area was burned over by a wild- fire, destroying the layer of heavy duff as well as the rodent population. A broadcast seeding was made in spring 1937. Ten years later the area seeded on bare ground averaged 10,600 seedlings per acre. • SUBSEQUENT SEEDING TRIALS • The success of the seeding at Aurora did not arouse much general interest, probably because it was given little publicity. It likely was respons- ible, however, for at least some of the seeding trials put in by various members of the staff
. (F-443112, 447815) Figure 1. — Two views of the Aurora jack pine direct seeding. In 1936 the area was burned over by a wild- fire, destroying the layer of heavy duff as well as the rodent population. A broadcast seeding was made in spring 1937. Ten years later the area seeded on bare ground averaged 10,600 seedlings per acre. • SUBSEQUENT SEEDING TRIALS • The success of the seeding at Aurora did not arouse much general interest, probably because it was given little publicity. It likely was respons- ible, however, for at least some of the seeding trials put in by various members of the staff of the Lake States Forest Experiment Station in the late 30's. These and subsequent tests in the 40's and 50's were mostly with jack pine, but a few trials were also made with red pine, white pine, white spruce, black spruce, and balsam fir. Some were made in Minnesota on the Chippewa and Superior National Forests, and some in Wisconsin and Michigan. Canadian foresters have also been interested in seeding, in fact, even longer than we in the Lake States. Their early studies, however, were reported only recently and are included here ( Cay- ford, 1959; Haig, 1959). The general details of these various trials are given by seeding methods under species. Others may have been installed, but they have not been reported in the common channels used for for- estry publications. The results of the seedings have been rated as to success in three groups, good, fair, and poor- to-failure, on the basis of the criteria shown in table 1. The standards set up are somewhat lower for spruces and balsam fir than for pines. This is because the spruces and balsam fir can stand more suppression and also tend to fill in by means of early self-seeding. Jack Pine The many trials of direct seeding with jack pine in the Lake States and adjacent Canada in- clude almost all of the possible combinations of seeding methods and site preparation. They cover sites from eastern Ontario to western Manitoba.
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Keywords: ., bookcentury1900, bookcollectionbiodiversity, booksubjectconifers
