. Annual report of the New York State College of Agriculture at Cornell University and the Agricultural Experiment Station. New York State College of Agriculture; Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). 514 Bulletin 316 peach region about the town of Koshkonong, in Oregon county. George Reeder, of the United States Weather Bureau, after a careful study of the topography and cHmatic conditions, reaches the conclusion that the immunity of the orchards in that vicinity from frost results from drainage of the cold air away from the orchards, and, altho
. Annual report of the New York State College of Agriculture at Cornell University and the Agricultural Experiment Station. New York State College of Agriculture; Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). 514 Bulletin 316 peach region about the town of Koshkonong, in Oregon county. George Reeder, of the United States Weather Bureau, after a careful study of the topography and cHmatic conditions, reaches the conclusion that the immunity of the orchards in that vicinity from frost results from drainage of the cold air away from the orchards, and, although the slope of the land is slight, it is sufficient to ward off frost. The famous regions known variously as " thermal belts," " frostless zones," or " verdant zones," found in certain mountainous districts of North Carolina and elsewhere, result from air drainage. The verdant. M/^r / Fig. 139.—Average date of last killing frost in spring zone in Macon county. North Carolina, in the valley of the Little Tennes- see River, was described by Silas McDowell in 1861. It lies between 300 and 700 feet above the valley floor, and the valley floor is about 2,000 feet above sea level. The breadth of this zone is about 400 feet. It follows up the smaller tributaries of the river, and in the higher valleys, where the valley floor is 3,900 feet above sea level, the verdant zone lies between 4,000 and 4,100 feet. It is said that within this zone frost never injures vegetation and the tendcrest grapes never fail to produce abundant crops. A similiar zone is found in Polk county. North Carolina, on the flank of the mountain spur adjacent to the valleys of the Blue 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 New York State College of Agriculture; Cornell University. Agricultural
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