A First Report on the Relations Between Climates and CropsSummary 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 11
... shade on development ( Hellriegel ) Influence of long and short waves of light ( Vöchting ; Sachs ) Influence of dryness and sunlight on development of tubers ( Knight ; Langenthal ; Wollny ) .. 3.558222REEF222 8 80 65 67 67 69 72 73 73 ...
... shade on development ( Hellriegel ) Influence of long and short waves of light ( Vöchting ; Sachs ) Influence of dryness and sunlight on development of tubers ( Knight ; Langenthal ; Wollny ) .. 3.558222REEF222 8 80 65 67 67 69 72 73 73 ...
Page 22
... shaded from the effect of sunshine ; this is the temperature of the air very nearly as given by the whirled or ventilated or sling thermometers and is that which is needed in dynamic meteorology . But the sunshine produces important ...
... shaded from the effect of sunshine ; this is the temperature of the air very nearly as given by the whirled or ventilated or sling thermometers and is that which is needed in dynamic meteorology . But the sunshine produces important ...
Page 39
... shade temperature 1,546 ° C .; at Lynden ( North Cape ) , 72 days , total shade temperature 675 ° C. Or , if we use , not the shade temper- atures , but those of a thermometer exposed to the full sunshine , as is done by Gasparin , then ...
... shade temperature 1,546 ° C .; at Lynden ( North Cape ) , 72 days , total shade temperature 675 ° C. Or , if we use , not the shade temper- atures , but those of a thermometer exposed to the full sunshine , as is done by Gasparin , then ...
Page 59
... shade only when the sun shines on it , and that it is lower than the temperature of the air in the shade only when the radiation cools it at nighttime or when the rain falls in the daytime and is for a short time followed by rapid ...
... shade only when the sun shines on it , and that it is lower than the temperature of the air in the shade only when the radiation cools it at nighttime or when the rain falls in the daytime and is for a short time followed by rapid ...
Page 72
... the moderate heat of summer upon the seashore , a circumstance which is shown by thermometers exposed in the open air and in the shade , but 72 Sunshine and transpiration (Marié-Davy; Deherain) Annual distribution of sunshine (Humboldt)
... the moderate heat of summer upon the seashore , a circumstance which is shown by thermometers exposed in the open air and in the shade , but 72 Sunshine and transpiration (Marié-Davy; Deherain) Annual distribution of sunshine (Humboldt)
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Common terms and phrases
acid actinometric degrees agricultural altitude ammonia annual atmosphere August average barley blossoming bushels carbonic acid cent cereals chemical chlorophyll climate Collomia Crataegus crop cultivation date of flowering date of sowing December epoch evaporation experiments favorable fertilizers following table frost germination given gives grain grams growth harvest heat Hervé Mangon inches increase influence intensity July July 18 July 23 June June 16 June 22 kilograms latitude leaf Leguminosa light Linsser maize Marié-Davy maximum mean daily temperatures mean temperature meteorological meters method moisture Montsouris nitrates nitrogen observations October oxygen perature plants plats quantity radiation rain rainfall Réaum ripening roots season seed Sept September September 29 Sesamum shows soil solar sown species stant stations sum total sunlight sunshine surface tempera temperature Thermal constants thermometer tion ture varieties vegetation wind winter wheat
Popular passages
Page 369 - On the Relative Intensity of the Heat and Light of the Sun upon Different Latitudes of the Earth.
Page 311 - 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 316 - 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 304 - 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 303 - 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 306 - 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...