A First Report on the Relations Between Climates and Crops

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U.S. Government Printing Office, 1905 - Crops and climate - 386 pages
Summary of expert opinion published up to 1891, on seed germination; soil temperature and moisture; solar energy; atmospheric conditions; and influences of climate; with data for selected U.S. and foreign locations.

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Page 367 - On the Relative Intensity of the Heat and Light of the Sun upon Different Latitudes of the Earth.
Page 309 - The visitations most marked and best defined, occur at intervals of about sixty-five years, reckoning from the middle of one period to the middle of the next period, and last from twenty to twenty-two years, making the interval from the end of one to the beginning of the next about forty-five years. 6.
Page 27 - ... and below, a red spot instead of purplish-red. With the blue glasses, which allowed some green and yellow to pass, that which was red or yellow in the leaf had spread, so that there only remained a green border or edge. Under the nearly pure violet glasses the foliage became almost uniformly green. Thus, by means of colored glasses, provided they are not yellow, horticulturists may hope to obtain at least temporary effects as to the coloring of variegated foliage. The action of electricity on...
Page 27 - ... exact degree of its action by day and by night. An atmosphere of carbonic acid gas might also be created, such as is supposed to have existed in the coal period. Then it might be seen to what extent our present vegetation would take an excess of carbon from the air, and if its general existence was inconvenienced by it. Then it might be ascertained what tribes of plants could bear this condition, and what other families could not have existed, supposing that the air had formerly had a very strong...
Page 82 - X 0.8758 where the exponent e represents the thickness of the layer of air through which the sun's rays must pass...
Page 314 - The ideal climate for wheat is one with a long and rather wet winter, with little or no frost, prolonged into a cool and rather wet spring, which gradually fades into a warmer summer, the weather growing...
Page 302 - C, obtained some of these seeds from Georgia and planted them. This crop failed to mature, and the first successful crop of long staple cotton grown in South Carolina was planted in 1790, by William Elliott, on the northwest corner of Hilton Head, on the exact spot where Jean Ribault landed the first colonists and erected a column of stone, claiming the territory for France, a century before the English settled on the coast. Mr. Elliott's crop sold for \oY2A.
Page 301 - Bahamas, and Signer Filippo Partatori (Florence, 1866) saying it came from Cat Island, one of the Barbadoes. "But as Anguilla is one of the Barbadoes, and Cat Island one of the Bahamas, it would seem difficult to decide to which group of islands we are indebted for these seed.
Page 304 - Island, Colleton County, SC, obtained some of these seeds from Georgia and planted them. This crop failed to mature, and the first successful crop of long staple cotton grown in South Carolina was planted in 1790, by William Elliott, on the northwest corner of Hilton. Head, on the exact spot where Jean Ribault landed the first colonists and erected a column of stone, claiming the territory for France, a century before the English settled on the...
Page 26 - Accordiag to the experiments we have on this subject, they would appear to have but little power over any of the functions ; but it would be worth while to investigate further the calorific regions of the spectrum by employing Dr. Tyndall's process, that is, by means of iodine dissolved in bisulphide of carbon, which permits no trace of visible light to pass. How interesting it would be to make all these laboratory experiments on a large scale ! Instead of looking into small cases, or into a small...

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