Carnegie Institution of Washington Publication Volume 141 download PDF, EPUB, Kindle
Carnegie Institution of Washington Publication Volume 141 download PDF, EPUB, Kindle
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Author: Carnegie Institution of Washington
Number of Pages: 30 pages
Published Date: 01 Mar 2012
Publisher: Rarebooksclub.com
Publication Country: Miami Fl, United States
Language: English
Type: Pdf
ISBN: 9781130865721
File size: 27 Mb
Download Link: Carnegie Institution of Washington Publication Volume 141
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1910 Excerpt: ...a distinctive structural feature. (4) Apart from direct insolation, evidence has accumulated going to show that slight expansion and contraction of the sahuaro trunk follow changes of air-temperature, but in most cases these minor changes are masked bv those occasioned bv variations in amount of soil-water. (5) After the first few years, growth in the sahuaro is apical, the increments of succeeding years increasing in diameter until the trunk attains the full thickness, which it afterwards maintains through life. The average yearly growth in height of individuals was between 10 and 12 cm. From these data, which are all thus far available, it appears that a giant cactus requires on an average approximately 100 years to attain a height of 10 meters. Observations thus far do not establish any definite relation between growth and rainfall, though it is hardly conceivable that such a relation does not exist. On the other hand, the fact that.growth takes place chiefly in the summer time is unquestioned. (6) The percentage of water in an ordinary healthy sahuaro in a dry time ranges approximately from 75 per cent of the fresh weight in its lower part to more than 90 per cent in its upper part. An individual 6 meters in height absorbed and stored approximately 412 liters of water between November, 1906, and March, 1907, besides the amount transpired. Transpiration from the trunk is necessarily slow, but is rapid from flowers and flower-buds. The average transpiration of a fully-opened flower is at least 850 mg. for an hour of full sunlight. About 3.27 liters of water are stored in the tissues of every 100 flowers, but even when this is added to the amount transpired it is an inconsiderable quantity in comparison with the entire amount stored in the trunk. None the ...
Read online Carnegie Institution of Washington Publication Volume 141 Buy and read online Carnegie Institution of Washington Publication Volume 141 Download and read Carnegie Institution of Washington Publication Volume 141 ebook, pdf, djvu, epub, mobi, fb2, zip, rar, torrent Download to iPad/iPhone/iOS, B&N nook Carnegie Institution of Washington Publication Volume 141 ebook, pdf, djvu, epub, mobi, fb2, zip, rar, torrent
Carnegie Institution of Washington Publication Volume 141. Carnegie Institution of Washington
Author: Carnegie Institution of Washington
Number of Pages: 30 pages
Published Date: 01 Mar 2012
Publisher: Rarebooksclub.com
Publication Country: Miami Fl, United States
Language: English
Type: Pdf
ISBN: 9781130865721
File size: 27 Mb
Download Link: Carnegie Institution of Washington Publication Volume 141
---------------------------------------------------------------
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1910 Excerpt: ...a distinctive structural feature. (4) Apart from direct insolation, evidence has accumulated going to show that slight expansion and contraction of the sahuaro trunk follow changes of air-temperature, but in most cases these minor changes are masked bv those occasioned bv variations in amount of soil-water. (5) After the first few years, growth in the sahuaro is apical, the increments of succeeding years increasing in diameter until the trunk attains the full thickness, which it afterwards maintains through life. The average yearly growth in height of individuals was between 10 and 12 cm. From these data, which are all thus far available, it appears that a giant cactus requires on an average approximately 100 years to attain a height of 10 meters. Observations thus far do not establish any definite relation between growth and rainfall, though it is hardly conceivable that such a relation does not exist. On the other hand, the fact that.growth takes place chiefly in the summer time is unquestioned. (6) The percentage of water in an ordinary healthy sahuaro in a dry time ranges approximately from 75 per cent of the fresh weight in its lower part to more than 90 per cent in its upper part. An individual 6 meters in height absorbed and stored approximately 412 liters of water between November, 1906, and March, 1907, besides the amount transpired. Transpiration from the trunk is necessarily slow, but is rapid from flowers and flower-buds. The average transpiration of a fully-opened flower is at least 850 mg. for an hour of full sunlight. About 3.27 liters of water are stored in the tissues of every 100 flowers, but even when this is added to the amount transpired it is an inconsiderable quantity in comparison with the entire amount stored in the trunk. None the ...
Read online Carnegie Institution of Washington Publication Volume 141 Buy and read online Carnegie Institution of Washington Publication Volume 141 Download and read Carnegie Institution of Washington Publication Volume 141 ebook, pdf, djvu, epub, mobi, fb2, zip, rar, torrent Download to iPad/iPhone/iOS, B&N nook Carnegie Institution of Washington Publication Volume 141 ebook, pdf, djvu, epub, mobi, fb2, zip, rar, torrent