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File:Development and activities of roots of crop plants; a study in crop ecology (1922) (20703887469).jpg

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Title: Development and activities of roots of crop plants; a study in crop ecology
Identifier: developmentactiv00weav (find matches)
Year: 1922 (1920s)
Authors: Weaver, John E. (John Ernest), 1884-1966; Jean, Frank Covert, 1880- joint author; Crist, John W. , joint author
Subjects: Roots (Botany); Plant ecology; Crops and climate
Publisher: Washington, Carnegie Institution of Washington
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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12 Development and Activities of Roots of Crop Plants. height of about 3 feet. The mature root system bore a strong resemblance in form to that found at the last examination. It was characterized by the large number of deeply penetrating roots. Some of these ran almost verti- cally downward from the base of the plant, while others went out obliquely to a distance as great as 12 inches and then turned downward with a gradual
Text Appearing After Image:
Fig. 2. -A. University No. 21 oats at maturity. B. Swedish Select oats at maturity. curve. Other roots took positions intermediate to these extremes (fig. 2 b). The number of these deeper roots varied from 7 to 11. They pursued a rather tortuous course. The usual depth of penetration ranged from 2 to

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Weaver, John E. (John Ernest), 1884-1966; Jean, Frank Covert, 1880- joint author;

Crist, John W., joint author
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26 August 2015
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current08:27, 26 August 2015Thumbnail for version as of 08:27, 26 August 20152,584 × 2,924 (1.99 MB)Fæ (talk | contribs)== {{int:filedesc}} == {{information |description={{en|1=<br> '''Title''': Development and activities of roots of crop plants; a study in crop ecology<br> '''Identifier''': developmentactiv00weav ([https://commons.wikimedia.org/w/index.php?title=Specia...

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