. Biology of rust resistance in forest trees : proceedings of a NATO-IUFRO advanced study institute, August 17-24, 1969. Trees; Pine; Trees; Rust diseases. WHITE PINES IN EASTERN NORTH .AMERICA 203. Figure 2. Young Pinus strobus stand in northern Wisconsin (photo courtesy of Wisconsin State Department of Agriculture). poorer was the response of trees of that seed source in the test area (Pauley, Spurr, and Whitmore, 1955). In other seed source tests in Wisconsin, Minnesota, Upper Michigan, and Ontario, the northern winter climate appeared to have adverse effects on trees of southern origins (K
. Biology of rust resistance in forest trees : proceedings of a NATO-IUFRO advanced study institute, August 17-24, 1969. Trees; Pine; Trees; Rust diseases. WHITE PINES IN EASTERN NORTH .AMERICA 203. Figure 2. Young Pinus strobus stand in northern Wisconsin (photo courtesy of Wisconsin State Department of Agriculture). poorer was the response of trees of that seed source in the test area (Pauley, Spurr, and Whitmore, 1955). In other seed source tests in Wisconsin, Minnesota, Upper Michigan, and Ontario, the northern winter climate appeared to have adverse effects on trees of southern origins (King and Nienstaedt, 1968; Fowler and Heimburger, unpublished data). Volume yields have been estimated in older plantations, but informa- tion on seed origin is usually not available. Yield per acre varies widely, increasing with age, site quality and spacing to at least 3 x 3 m (Vimmerstedt, 1962; Gilmore, 1968). In the southern Appalachians, yield is as high as 55,000 board feet per acre (770 m3/ha) at 35 years under the most favorable conditions (Vimmerstedt, 1962). P. strobus grows well in plantations in the midwestern United States*, where natural disjunct stands are restricted to cool microclimates. In this region, it seems to be adapted to a variety of sites, except heavy, poorly drained soils and strip mine spoil banks. P. strobus does not seem to be well adapted in places where it has been planted in western North America. Growth has been poor at Placervilli California, in the Sierra Nevada mountains. Form in Montana plantations is poor (Barnes and Bingham, 1962). Average diameter of 50-year-old plots in one Montana plantation was 24 to 30 cm (Barnes, unpublished data).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original North Atlantic Treaty Organization; International Union of Forestry Research Organi
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Keywords: ., bookauthoruni, bookcentury1900, booksubjectpine, booksubjecttrees
