Electricity in Agriculture and Horticulture , livre ebook

Forgotten Books - S. Lemström

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100 pages

English

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Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. The cause of the astonishing development of vegetation under such conditions has hitherto been held to lie in the long day, which lasts from two to three months in these regions during their short summer. It is further sometimes supposed that this circumstance will provide the crops with more light and heat, the principal factors of vegetation. This is, however, not true, for calculation shows that the quantity, notwithstanding this long day, is less than it is, for instance, in 60 deg. Of latitude. In consequence of the low height of the sun over the horizon, the rays meet the earth in such an oblique direction that their illuminating and heating power is greatly lessened, and this power is also lessened by the great absorption in the atmosphere. Since the quantities of light and heat received are relatively smaller than in more southern regions, the cause of the rich development of the vegetables cannot lie in the long day, and must be sought elsewhere.

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Electronic engineering

Sciences et techniques

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Publié par	Forgotten Books
Date de parution	27 novembre 2019
Nombre de lectures	0
EAN13	9780243656691
Langue	English
Poids de l'ouvrage	3 Mo

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